/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/popl20-more/buffer-mult.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 14:19:06,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 14:19:06,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 14:19:06,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 14:19:06,199 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 [2022-02-15 14:19:06,219 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 14:19:06,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 14:19:06,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 14:19:06,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 14:19:06,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 14:19:06,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 14:19:06,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 14:19:06,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 14:19:06,222 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 14:19:06,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 14:19:06,223 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 14:19:06,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 14:19:06,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 14:19:06,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 14:19:06,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 14:19:06,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 14:19:06,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 14:19:06,224 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 14:19:06,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 14:19:06,224 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 14:19:06,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 14:19:06,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 14:19:06,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 14:19:06,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 14:19:06,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 14:19:06,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:19:06,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 14:19:06,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 14:19:06,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 14:19:06,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 14:19:06,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 14:19:06,226 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 14:19:06,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 14:19:06,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 14:19:06,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 14:19:06,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 14:19:06,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 14:19:06,455 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 14:19:06,455 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 14:19:06,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl [2022-02-15 14:19:06,456 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl' [2022-02-15 14:19:06,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 14:19:06,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 14:19:06,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 14:19:06,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 14:19:06,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 14:19:06,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,506 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 14:19:06,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 14:19:06,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 14:19:06,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 14:19:06,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 14:19:06,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 14:19:06,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 14:19:06,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 14:19:06,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 14:19:06,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/1) ... [2022-02-15 14:19:06,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:19:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:06,553 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) [2022-02-15 14:19:06,559 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 [2022-02-15 14:19:06,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 14:19:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 14:19:06,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 14:19:06,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 14:19:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 14:19:06,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 14:19:06,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 14:19:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 14:19:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 14:19:06,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 14:19:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 14:19:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 14:19:06,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-15 14:19:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-15 14:19:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-15 14:19:06,594 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 14:19:06,628 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 14:19:06,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 14:19:06,749 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 14:19:06,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 14:19:06,775 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 14:19:06,777 INFO L202 PluginConnector]: Adding new model buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:19:06 BoogieIcfgContainer [2022-02-15 14:19:06,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 14:19:06,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 14:19:06,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 14:19:06,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 14:19:06,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:19:06" (1/2) ... [2022-02-15 14:19:06,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d037a and model type buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:19:06, skipping insertion in model container [2022-02-15 14:19:06,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:19:06" (2/2) ... [2022-02-15 14:19:06,795 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult.wvr.bpl [2022-02-15 14:19:06,798 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 14:19:06,799 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 14:19:06,799 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 14:19:06,799 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 14:19:06,848 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-15 14:19:06,894 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 14:19:06,900 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 [2022-02-15 14:19:06,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-15 14:19:06,909 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-02-15 14:19:07,017 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 14:19:07,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:07,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:07,038 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2022-02-15 14:19:07,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:07,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676694639] [2022-02-15 14:19:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:07,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:07,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:07,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676694639] [2022-02-15 14:19:07,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676694639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:07,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:07,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:19:07,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912536920] [2022-02-15 14:19:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:07,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:19:07,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:19:07,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:19:07,282 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:07,385 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2022-02-15 14:19:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:19:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 14:19:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:07,411 INFO L225 Difference]: With dead ends: 1236 [2022-02-15 14:19:07,412 INFO L226 Difference]: Without dead ends: 1109 [2022-02-15 14:19:07,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:19:07,415 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:07,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-02-15 14:19:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2022-02-15 14:19:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2022-02-15 14:19:07,567 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2022-02-15 14:19:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:07,567 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2022-02-15 14:19:07,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2022-02-15 14:19:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:19:07,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:07,573 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, 1] [2022-02-15 14:19:07,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 14:19:07,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:07,574 INFO L85 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2022-02-15 14:19:07,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:07,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755281084] [2022-02-15 14:19:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:07,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:07,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:07,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755281084] [2022-02-15 14:19:07,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755281084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:07,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:07,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:19:07,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011716853] [2022-02-15 14:19:07,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:07,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:07,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:07,628 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:07,744 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2022-02-15 14:19:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:19:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:19:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:07,753 INFO L225 Difference]: With dead ends: 1524 [2022-02-15 14:19:07,753 INFO L226 Difference]: Without dead ends: 1418 [2022-02-15 14:19:07,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:07,759 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:07,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-02-15 14:19:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2022-02-15 14:19:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2022-02-15 14:19:07,806 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2022-02-15 14:19:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:07,806 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2022-02-15 14:19:07,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2022-02-15 14:19:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:19:07,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:07,812 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, 1] [2022-02-15 14:19:07,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 14:19:07,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2022-02-15 14:19:07,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:07,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145251771] [2022-02-15 14:19:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:07,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:07,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:07,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145251771] [2022-02-15 14:19:07,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145251771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:07,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:07,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:19:07,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581060727] [2022-02-15 14:19:07,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:07,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:07,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:07,893 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:07,971 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2022-02-15 14:19:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:19:07,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:19:07,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:07,982 INFO L225 Difference]: With dead ends: 2017 [2022-02-15 14:19:07,982 INFO L226 Difference]: Without dead ends: 1875 [2022-02-15 14:19:07,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:07,988 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:07,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-02-15 14:19:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2022-02-15 14:19:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2022-02-15 14:19:08,034 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2022-02-15 14:19:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:08,034 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2022-02-15 14:19:08,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2022-02-15 14:19:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:19:08,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:08,038 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, 1, 1, 1, 1] [2022-02-15 14:19:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 14:19:08,039 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2022-02-15 14:19:08,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:08,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185007685] [2022-02-15 14:19:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:08,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:08,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:08,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185007685] [2022-02-15 14:19:08,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185007685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:08,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124097345] [2022-02-15 14:19:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:08,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:08,096 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) [2022-02-15 14:19:08,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 14:19:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:08,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 14:19:08,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:08,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:08,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124097345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:08,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:08,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-02-15 14:19:08,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17538795] [2022-02-15 14:19:08,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:08,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 14:19:08,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:08,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 14:19:08,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 14:19:08,306 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2022-02-15 14:19:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:08,463 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2022-02-15 14:19:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 24 [2022-02-15 14:19:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:08,473 INFO L225 Difference]: With dead ends: 2308 [2022-02-15 14:19:08,473 INFO L226 Difference]: Without dead ends: 2108 [2022-02-15 14:19:08,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:08,478 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:08,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-02-15 14:19:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2022-02-15 14:19:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2022-02-15 14:19:08,530 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2022-02-15 14:19:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:08,530 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2022-02-15 14:19:08,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2022-02-15 14:19:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2022-02-15 14:19:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:19:08,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:08,535 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, 1, 1, 1, 1] [2022-02-15 14:19:08,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-15 14:19:08,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:08,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2022-02-15 14:19:08,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:08,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962553829] [2022-02-15 14:19:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:08,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:08,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:08,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962553829] [2022-02-15 14:19:08,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962553829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:08,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:08,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:19:08,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332253741] [2022-02-15 14:19:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:08,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:08,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:08,816 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:08,896 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2022-02-15 14:19:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:19:08,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:19:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:08,905 INFO L225 Difference]: With dead ends: 1950 [2022-02-15 14:19:08,905 INFO L226 Difference]: Without dead ends: 1860 [2022-02-15 14:19:08,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:08,908 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:08,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-02-15 14:19:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2022-02-15 14:19:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2022-02-15 14:19:08,949 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2022-02-15 14:19:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:08,951 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2022-02-15 14:19:08,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2022-02-15 14:19:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:19:08,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:08,961 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, 1, 1, 1, 1] [2022-02-15 14:19:08,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 14:19:08,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2022-02-15 14:19:08,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:08,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775822388] [2022-02-15 14:19:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:08,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:08,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:08,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775822388] [2022-02-15 14:19:08,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775822388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:08,985 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:08,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:19:08,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243630703] [2022-02-15 14:19:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:08,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:08,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:08,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:08,986 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:09,046 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2022-02-15 14:19:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:19:09,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:19:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:09,053 INFO L225 Difference]: With dead ends: 1308 [2022-02-15 14:19:09,053 INFO L226 Difference]: Without dead ends: 1308 [2022-02-15 14:19:09,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:09,054 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:09,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:19:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-02-15 14:19:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2022-02-15 14:19:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2022-02-15 14:19:09,079 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2022-02-15 14:19:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:09,079 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2022-02-15 14:19:09,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2022-02-15 14:19:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:19:09,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:09,082 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, 1, 1, 1, 1] [2022-02-15 14:19:09,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 14:19:09,082 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2022-02-15 14:19:09,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:09,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291480679] [2022-02-15 14:19:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:09,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:09,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:09,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291480679] [2022-02-15 14:19:09,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291480679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:09,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:09,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:19:09,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053062578] [2022-02-15 14:19:09,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:09,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:09,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:09,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:09,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:09,112 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:09,161 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2022-02-15 14:19:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:19:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:19:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:09,166 INFO L225 Difference]: With dead ends: 1142 [2022-02-15 14:19:09,167 INFO L226 Difference]: Without dead ends: 1120 [2022-02-15 14:19:09,167 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 [2022-02-15 14:19:09,167 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:09,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:19:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-02-15 14:19:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2022-02-15 14:19:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2022-02-15 14:19:09,190 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2022-02-15 14:19:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:09,191 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2022-02-15 14:19:09,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2022-02-15 14:19:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 14:19:09,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:09,193 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:09,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 14:19:09,194 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2022-02-15 14:19:09,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:09,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10286911] [2022-02-15 14:19:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:09,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:09,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:09,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10286911] [2022-02-15 14:19:09,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10286911] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:09,216 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:09,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:19:09,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214352153] [2022-02-15 14:19:09,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:09,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:09,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:09,217 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:09,252 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2022-02-15 14:19:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:19:09,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-15 14:19:09,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:09,259 INFO L225 Difference]: With dead ends: 1334 [2022-02-15 14:19:09,259 INFO L226 Difference]: Without dead ends: 1334 [2022-02-15 14:19:09,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:19:09,259 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:09,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:19:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-02-15 14:19:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2022-02-15 14:19:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2022-02-15 14:19:09,299 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2022-02-15 14:19:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:09,300 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2022-02-15 14:19:09,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2022-02-15 14:19:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 14:19:09,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:09,303 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:09,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 14:19:09,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2022-02-15 14:19:09,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:09,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120928821] [2022-02-15 14:19:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:09,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:09,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:09,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120928821] [2022-02-15 14:19:09,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120928821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:09,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291595076] [2022-02-15 14:19:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:09,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:09,334 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) [2022-02-15 14:19:09,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 14:19:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:09,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-15 14:19:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:09,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-15 14:19:09,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291595076] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:09,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-15 14:19:09,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-02-15 14:19:09,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756171300] [2022-02-15 14:19:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:09,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:09,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:09,400 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:09,428 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2022-02-15 14:19:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:19:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-15 14:19:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:09,436 INFO L225 Difference]: With dead ends: 1658 [2022-02-15 14:19:09,436 INFO L226 Difference]: Without dead ends: 1658 [2022-02-15 14:19:09,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:09,437 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:09,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:19:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-02-15 14:19:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2022-02-15 14:19:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2022-02-15 14:19:09,463 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2022-02-15 14:19:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:09,463 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2022-02-15 14:19:09,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2022-02-15 14:19:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 14:19:09,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:09,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:09,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:09,682 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,SelfDestructingSolverStorable8 [2022-02-15 14:19:09,682 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2022-02-15 14:19:09,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:09,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500312699] [2022-02-15 14:19:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:09,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:09,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:09,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500312699] [2022-02-15 14:19:09,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500312699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:09,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094720189] [2022-02-15 14:19:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:09,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:09,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:09,758 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) [2022-02-15 14:19:09,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 14:19:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:09,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-15 14:19:09,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:09,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 14 [2022-02-15 14:19:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:10,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:10,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:10,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:19:10,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:10,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-02-15 14:19:10,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-02-15 14:19:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:10,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094720189] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:10,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:10,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-15 14:19:10,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931654111] [2022-02-15 14:19:10,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:10,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:19:10,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:10,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:19:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:19:10,491 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:10,612 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2022-02-15 14:19:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 14:19:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:10,627 INFO L225 Difference]: With dead ends: 2387 [2022-02-15 14:19:10,627 INFO L226 Difference]: Without dead ends: 2308 [2022-02-15 14:19:10,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:19:10,628 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:10,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 193 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-02-15 14:19:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2022-02-15 14:19:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2022-02-15 14:19:10,723 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2022-02-15 14:19:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2022-02-15 14:19:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2022-02-15 14:19:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 14:19:10,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:10,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:10,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:10,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:10,952 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2022-02-15 14:19:10,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:10,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753088882] [2022-02-15 14:19:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:10,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:12,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:12,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753088882] [2022-02-15 14:19:12,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753088882] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:12,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368227854] [2022-02-15 14:19:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:19:12,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:12,066 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) [2022-02-15 14:19:12,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 14:19:12,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:19:12,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:12,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-15 14:19:12,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:12,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-15 14:19:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:12,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:13,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:13,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-02-15 14:19:13,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:13,199 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 9 treesize of output 14 [2022-02-15 14:19:13,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-02-15 14:19:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:13,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368227854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:13,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:13,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-02-15 14:19:13,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737942129] [2022-02-15 14:19:13,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:13,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:13,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:13,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:13,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:13,232 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:13,797 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2022-02-15 14:19:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:13,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 14:19:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:13,805 INFO L225 Difference]: With dead ends: 2792 [2022-02-15 14:19:13,805 INFO L226 Difference]: Without dead ends: 2713 [2022-02-15 14:19:13,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:13,806 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:13,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:19:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-02-15 14:19:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2022-02-15 14:19:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2022-02-15 14:19:13,845 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2022-02-15 14:19:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:13,845 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2022-02-15 14:19:13,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2022-02-15 14:19:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 14:19:13,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:13,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:13,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:14,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:14,069 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:14,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2022-02-15 14:19:14,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:14,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699232781] [2022-02-15 14:19:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:14,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:14,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:14,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699232781] [2022-02-15 14:19:14,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699232781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:14,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742216685] [2022-02-15 14:19:14,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:19:14,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:14,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:14,173 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) [2022-02-15 14:19:14,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 14:19:14,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:19:14,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-15 14:19:14,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:14,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-15 14:19:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:14,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:14,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:14,410 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 30 treesize of output 32 [2022-02-15 14:19:14,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:14,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-02-15 14:19:14,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-02-15 14:19:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:14,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742216685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:14,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:14,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-02-15 14:19:14,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552304970] [2022-02-15 14:19:14,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:14,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:14,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:14,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:14,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:14,501 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:14,593 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2022-02-15 14:19:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:14,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 14:19:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:14,601 INFO L225 Difference]: With dead ends: 2570 [2022-02-15 14:19:14,601 INFO L226 Difference]: Without dead ends: 2491 [2022-02-15 14:19:14,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:14,602 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 94 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:14,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 160 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-02-15 14:19:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2022-02-15 14:19:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2022-02-15 14:19:14,640 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2022-02-15 14:19:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:14,640 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2022-02-15 14:19:14,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2022-02-15 14:19:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 14:19:14,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:14,645 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:14,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:14,861 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,SelfDestructingSolverStorable11 [2022-02-15 14:19:14,861 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2022-02-15 14:19:14,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:14,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348783620] [2022-02-15 14:19:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:14,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:14,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:14,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348783620] [2022-02-15 14:19:14,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348783620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:14,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129123637] [2022-02-15 14:19:14,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:19:14,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:14,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:14,940 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) [2022-02-15 14:19:14,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 14:19:14,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:19:14,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-15 14:19:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:15,041 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 14 [2022-02-15 14:19:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:15,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:15,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:15,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:19:15,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:15,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-02-15 14:19:15,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-02-15 14:19:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:15,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129123637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:15,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:15,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-02-15 14:19:15,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350125588] [2022-02-15 14:19:15,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:15,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:15,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:15,224 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2022-02-15 14:19:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:15,357 INFO L93 Difference]: Finished difference Result 2992 states and 11283 transitions. [2022-02-15 14:19:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 29 [2022-02-15 14:19:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:15,365 INFO L225 Difference]: With dead ends: 2992 [2022-02-15 14:19:15,365 INFO L226 Difference]: Without dead ends: 2913 [2022-02-15 14:19:15,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:15,366 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:15,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 219 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2022-02-15 14:19:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2081. [2022-02-15 14:19:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2022-02-15 14:19:15,407 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2022-02-15 14:19:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:15,408 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2022-02-15 14:19:15,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2022-02-15 14:19:15,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2022-02-15 14:19:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 14:19:15,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:15,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:15,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:15,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:15,628 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:15,629 INFO L85 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2022-02-15 14:19:15,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:15,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428598233] [2022-02-15 14:19:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:15,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:15,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:15,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428598233] [2022-02-15 14:19:15,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428598233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:15,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235780719] [2022-02-15 14:19:15,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:19:15,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:15,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:15,704 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) [2022-02-15 14:19:15,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 14:19:15,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:19:15,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:15,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-15 14:19:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:15,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-02-15 14:19:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:15,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:15,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:15,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:19:16,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:16,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-02-15 14:19:16,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-02-15 14:19:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:16,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235780719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:16,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:16,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-02-15 14:19:16,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498808869] [2022-02-15 14:19:16,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:16,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:16,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:16,076 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:16,195 INFO L93 Difference]: Finished difference Result 2770 states and 10407 transitions. [2022-02-15 14:19:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:16,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 14:19:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:16,203 INFO L225 Difference]: With dead ends: 2770 [2022-02-15 14:19:16,203 INFO L226 Difference]: Without dead ends: 2691 [2022-02-15 14:19:16,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:16,203 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:16,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 207 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-02-15 14:19:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 1882. [2022-02-15 14:19:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2022-02-15 14:19:16,240 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2022-02-15 14:19:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:16,240 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2022-02-15 14:19:16,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2022-02-15 14:19:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 14:19:16,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:16,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:16,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:16,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:16,458 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2022-02-15 14:19:16,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:16,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580571204] [2022-02-15 14:19:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:16,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:16,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:16,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580571204] [2022-02-15 14:19:16,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580571204] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:16,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595552391] [2022-02-15 14:19:16,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:19:16,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:16,536 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) [2022-02-15 14:19:16,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 14:19:16,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:19:16,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:16,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 14:19:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:16,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-02-15 14:19:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:16,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:16,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:16,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-02-15 14:19:16,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:16,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-02-15 14:19:16,880 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-02-15 14:19:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:16,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595552391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:16,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:16,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-15 14:19:16,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195556255] [2022-02-15 14:19:16,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:16,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:19:16,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:19:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:19:16,923 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2022-02-15 14:19:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:17,026 INFO L93 Difference]: Finished difference Result 2635 states and 9856 transitions. [2022-02-15 14:19:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:17,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 29 [2022-02-15 14:19:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:17,033 INFO L225 Difference]: With dead ends: 2635 [2022-02-15 14:19:17,033 INFO L226 Difference]: Without dead ends: 2556 [2022-02-15 14:19:17,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:19:17,033 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 53 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:17,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-02-15 14:19:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1926. [2022-02-15 14:19:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2022-02-15 14:19:17,092 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2022-02-15 14:19:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:17,092 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2022-02-15 14:19:17,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2022-02-15 14:19:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2022-02-15 14:19:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 14:19:17,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:17,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:17,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:17,312 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,SelfDestructingSolverStorable14 [2022-02-15 14:19:17,313 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2022-02-15 14:19:17,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:17,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041225908] [2022-02-15 14:19:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:17,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:17,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:17,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041225908] [2022-02-15 14:19:17,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041225908] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:17,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444021073] [2022-02-15 14:19:17,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:19:17,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:17,342 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) [2022-02-15 14:19:17,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 14:19:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 14:19:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:17,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:17,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444021073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:17,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:17,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-02-15 14:19:17,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650583738] [2022-02-15 14:19:17,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:17,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:19:17,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:19:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:19:17,465 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:17,554 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2022-02-15 14:19:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:19:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-15 14:19:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:17,561 INFO L225 Difference]: With dead ends: 3472 [2022-02-15 14:19:17,562 INFO L226 Difference]: Without dead ends: 3318 [2022-02-15 14:19:17,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:19:17,562 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:17,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 74 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-02-15 14:19:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2022-02-15 14:19:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2022-02-15 14:19:17,611 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2022-02-15 14:19:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:17,612 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2022-02-15 14:19:17,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2022-02-15 14:19:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 14:19:17,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:17,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:17,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:17,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-15 14:19:17,832 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:17,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2022-02-15 14:19:17,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:17,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002639519] [2022-02-15 14:19:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:17,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:17,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:17,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002639519] [2022-02-15 14:19:17,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002639519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:17,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:19:17,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 14:19:17,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956368754] [2022-02-15 14:19:17,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:19:17,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:17,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:19:17,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:17,856 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:17,909 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2022-02-15 14:19:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:19:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-15 14:19:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:17,921 INFO L225 Difference]: With dead ends: 5761 [2022-02-15 14:19:17,922 INFO L226 Difference]: Without dead ends: 5510 [2022-02-15 14:19:17,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:17,922 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:17,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 52 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:19:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2022-02-15 14:19:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2022-02-15 14:19:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2022-02-15 14:19:18,057 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2022-02-15 14:19:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:18,057 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2022-02-15 14:19:18,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2022-02-15 14:19:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 14:19:18,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:18,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:18,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 14:19:18,068 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2022-02-15 14:19:18,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:18,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600441534] [2022-02-15 14:19:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:18,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 14:19:18,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:18,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600441534] [2022-02-15 14:19:18,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600441534] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:18,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439308934] [2022-02-15 14:19:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:19:18,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:18,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:18,092 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) [2022-02-15 14:19:18,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 14:19:18,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:19:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:19:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 14:19:18,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 14:19:18,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439308934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:18,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:18,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-15 14:19:18,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799802356] [2022-02-15 14:19:18,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:18,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:19:18,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:19:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:19:18,281 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:18,666 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2022-02-15 14:19:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 14:19:18,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-15 14:19:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:18,714 INFO L225 Difference]: With dead ends: 17927 [2022-02-15 14:19:18,715 INFO L226 Difference]: Without dead ends: 15301 [2022-02-15 14:19:18,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:19:18,715 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:18,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 160 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:19:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-02-15 14:19:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2022-02-15 14:19:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2022-02-15 14:19:19,067 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2022-02-15 14:19:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:19,067 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2022-02-15 14:19:19,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2022-02-15 14:19:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 14:19:19,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:19,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:19,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:19,289 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,SelfDestructingSolverStorable17 [2022-02-15 14:19:19,289 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2022-02-15 14:19:19,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:19,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823443698] [2022-02-15 14:19:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:19,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:19,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:19,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823443698] [2022-02-15 14:19:19,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823443698] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:19,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462612245] [2022-02-15 14:19:19,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:19:19,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:19,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:19,318 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) [2022-02-15 14:19:19,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 14:19:19,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:19:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:19:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:19,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:19,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462612245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:19,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:19,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-15 14:19:19,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054388628] [2022-02-15 14:19:19,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:19,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:19:19,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:19:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:19:19,534 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:20,026 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2022-02-15 14:19:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 14:19:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-15 14:19:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:20,085 INFO L225 Difference]: With dead ends: 21371 [2022-02-15 14:19:20,085 INFO L226 Difference]: Without dead ends: 20932 [2022-02-15 14:19:20,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:19:20,087 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 350 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:20,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 83 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:19:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2022-02-15 14:19:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2022-02-15 14:19:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2022-02-15 14:19:20,635 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2022-02-15 14:19:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:20,635 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2022-02-15 14:19:20,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2022-02-15 14:19:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 14:19:20,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:20,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:20,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:20,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:20,890 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2022-02-15 14:19:20,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:20,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712902655] [2022-02-15 14:19:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:20,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:20,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:20,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712902655] [2022-02-15 14:19:20,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712902655] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:20,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572837045] [2022-02-15 14:19:20,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:19:20,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:20,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:20,915 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) [2022-02-15 14:19:20,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 14:19:20,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 14:19:20,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:20,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:19:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:21,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:21,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572837045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:21,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:21,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-15 14:19:21,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237582272] [2022-02-15 14:19:21,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:21,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:21,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:21,091 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2022-02-15 14:19:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:21,481 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2022-02-15 14:19:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:19:21,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2022-02-15 14:19:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:21,545 INFO L225 Difference]: With dead ends: 20596 [2022-02-15 14:19:21,545 INFO L226 Difference]: Without dead ends: 20518 [2022-02-15 14:19:21,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:19:21,545 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 183 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:21,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 61 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:19:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2022-02-15 14:19:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2022-02-15 14:19:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2022-02-15 14:19:22,051 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2022-02-15 14:19:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:22,051 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2022-02-15 14:19:22,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2022-02-15 14:19:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2022-02-15 14:19:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 14:19:22,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:22,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:22,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:22,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:22,295 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2022-02-15 14:19:22,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:22,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583841615] [2022-02-15 14:19:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:22,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:22,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:22,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583841615] [2022-02-15 14:19:22,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583841615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:22,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972063132] [2022-02-15 14:19:22,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:19:22,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:22,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:22,322 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) [2022-02-15 14:19:22,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 14:19:22,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:19:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:19:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:22,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:22,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972063132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:22,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:22,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-15 14:19:22,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835492711] [2022-02-15 14:19:22,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:22,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:22,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:22,520 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:23,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:23,015 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2022-02-15 14:19:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:19:23,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-15 14:19:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:23,089 INFO L225 Difference]: With dead ends: 22733 [2022-02-15 14:19:23,089 INFO L226 Difference]: Without dead ends: 21028 [2022-02-15 14:19:23,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:19:23,090 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 210 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:23,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 99 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:19:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2022-02-15 14:19:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2022-02-15 14:19:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2022-02-15 14:19:23,543 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2022-02-15 14:19:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:23,544 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2022-02-15 14:19:23,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2022-02-15 14:19:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 14:19:23,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:23,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:23,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:23,798 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,SelfDestructingSolverStorable20 [2022-02-15 14:19:23,798 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2022-02-15 14:19:23,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:23,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935527209] [2022-02-15 14:19:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:23,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:23,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:23,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935527209] [2022-02-15 14:19:23,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935527209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:23,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117829903] [2022-02-15 14:19:23,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:19:23,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:23,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:23,832 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) [2022-02-15 14:19:23,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 14:19:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:19:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:23,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:24,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117829903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:24,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:24,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-15 14:19:24,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728209612] [2022-02-15 14:19:24,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:24,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:19:24,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:19:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:19:24,034 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2022-02-15 14:19:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:24,722 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2022-02-15 14:19:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:19:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 34 [2022-02-15 14:19:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:24,832 INFO L225 Difference]: With dead ends: 31402 [2022-02-15 14:19:24,832 INFO L226 Difference]: Without dead ends: 31094 [2022-02-15 14:19:24,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:19:24,833 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 321 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:24,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 77 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:19:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2022-02-15 14:19:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2022-02-15 14:19:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2022-02-15 14:19:25,597 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2022-02-15 14:19:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:25,597 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2022-02-15 14:19:25,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2022-02-15 14:19:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2022-02-15 14:19:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 14:19:25,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:25,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:25,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:25,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:25,856 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2022-02-15 14:19:25,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:25,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396591955] [2022-02-15 14:19:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:25,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:25,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:25,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396591955] [2022-02-15 14:19:25,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396591955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:25,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583316779] [2022-02-15 14:19:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:19:25,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:25,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:25,918 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) [2022-02-15 14:19:25,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 14:19:25,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:19:25,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:25,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:19:25,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:26,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583316779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:26,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:26,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-15 14:19:26,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572182699] [2022-02-15 14:19:26,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:26,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:26,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:26,173 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:26,685 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2022-02-15 14:19:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:19:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-15 14:19:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:26,781 INFO L225 Difference]: With dead ends: 33709 [2022-02-15 14:19:26,781 INFO L226 Difference]: Without dead ends: 32656 [2022-02-15 14:19:26,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:19:26,784 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:26,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 102 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:19:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2022-02-15 14:19:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2022-02-15 14:19:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2022-02-15 14:19:27,620 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2022-02-15 14:19:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:27,620 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2022-02-15 14:19:27,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2022-02-15 14:19:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 14:19:27,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:27,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:27,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-15 14:19:27,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:27,884 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2022-02-15 14:19:27,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:27,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571228946] [2022-02-15 14:19:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:27,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:19:27,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:27,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571228946] [2022-02-15 14:19:27,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571228946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:27,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290516397] [2022-02-15 14:19:27,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:19:27,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:27,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:27,915 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) [2022-02-15 14:19:27,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 14:19:27,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:19:27,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:27,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:19:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:19:28,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 14:19:28,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290516397] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:28,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:28,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-15 14:19:28,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871111469] [2022-02-15 14:19:28,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:28,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:19:28,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:19:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:19:28,094 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:28,658 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2022-02-15 14:19:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:19:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-15 14:19:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:28,827 INFO L225 Difference]: With dead ends: 31214 [2022-02-15 14:19:28,828 INFO L226 Difference]: Without dead ends: 31106 [2022-02-15 14:19:28,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:19:28,828 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:28,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 73 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:19:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2022-02-15 14:19:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2022-02-15 14:19:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2022-02-15 14:19:29,658 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2022-02-15 14:19:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:29,658 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2022-02-15 14:19:29,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2022-02-15 14:19:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 14:19:29,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:29,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:29,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:29,934 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,SelfDestructingSolverStorable23 [2022-02-15 14:19:29,934 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2022-02-15 14:19:29,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:29,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622406513] [2022-02-15 14:19:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:29,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-15 14:19:29,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:29,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622406513] [2022-02-15 14:19:29,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622406513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:29,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349136531] [2022-02-15 14:19:29,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:19:29,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:29,965 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) [2022-02-15 14:19:29,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 14:19:30,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:19:30,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:30,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:19:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-15 14:19:30,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-15 14:19:30,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349136531] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:30,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-15 14:19:30,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-02-15 14:19:30,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257436167] [2022-02-15 14:19:30,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:30,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:19:30,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:30,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:19:30,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:30,070 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:30,446 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2022-02-15 14:19:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:19:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-15 14:19:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:30,564 INFO L225 Difference]: With dead ends: 29524 [2022-02-15 14:19:30,565 INFO L226 Difference]: Without dead ends: 29524 [2022-02-15 14:19:30,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:19:30,567 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:30,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:19:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2022-02-15 14:19:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2022-02-15 14:19:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2022-02-15 14:19:31,251 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2022-02-15 14:19:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:31,251 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2022-02-15 14:19:31,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2022-02-15 14:19:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 14:19:31,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:31,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:31,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:31,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:31,683 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2022-02-15 14:19:31,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:31,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193019805] [2022-02-15 14:19:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:31,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-15 14:19:31,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:31,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193019805] [2022-02-15 14:19:31,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193019805] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:31,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603047039] [2022-02-15 14:19:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:19:31,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:31,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:31,731 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) [2022-02-15 14:19:31,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 14:19:31,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:19:31,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:19:31,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-15 14:19:31,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-15 14:19:31,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603047039] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:19:31,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-15 14:19:31,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-02-15 14:19:31,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565252202] [2022-02-15 14:19:31,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:19:31,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:19:31,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:19:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 14:19:31,830 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:32,042 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2022-02-15 14:19:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:19:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-15 14:19:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:32,329 INFO L225 Difference]: With dead ends: 30000 [2022-02-15 14:19:32,329 INFO L226 Difference]: Without dead ends: 30000 [2022-02-15 14:19:32,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 14:19:32,332 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:32,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 57 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:19:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2022-02-15 14:19:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2022-02-15 14:19:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2022-02-15 14:19:32,977 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2022-02-15 14:19:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:32,977 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2022-02-15 14:19:32,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2022-02-15 14:19:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 14:19:33,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:33,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:33,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:33,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:33,240 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2022-02-15 14:19:33,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:33,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769698434] [2022-02-15 14:19:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:33,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 14:19:33,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:33,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769698434] [2022-02-15 14:19:33,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769698434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:33,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047182235] [2022-02-15 14:19:33,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:19:33,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:33,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:33,262 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) [2022-02-15 14:19:33,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 14:19:33,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:19:33,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:19:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 14:19:33,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 14:19:33,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047182235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:33,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:33,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-02-15 14:19:33,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326949660] [2022-02-15 14:19:33,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:33,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 14:19:33,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 14:19:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 14:19:33,410 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-02-15 14:19:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:33,857 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2022-02-15 14:19:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 14:19:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2022-02-15 14:19:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:34,006 INFO L225 Difference]: With dead ends: 37294 [2022-02-15 14:19:34,006 INFO L226 Difference]: Without dead ends: 37294 [2022-02-15 14:19:34,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 14:19:34,007 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 91 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:34,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:19:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2022-02-15 14:19:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2022-02-15 14:19:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2022-02-15 14:19:35,240 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2022-02-15 14:19:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:35,240 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2022-02-15 14:19:35,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-02-15 14:19:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2022-02-15 14:19:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:19:35,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:35,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:35,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:35,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:35,530 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2022-02-15 14:19:35,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:35,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660363576] [2022-02-15 14:19:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:35,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:35,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:35,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660363576] [2022-02-15 14:19:35,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660363576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:35,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575353770] [2022-02-15 14:19:35,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:19:35,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:35,741 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) [2022-02-15 14:19:35,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 14:19:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:19:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:36,002 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:19:36,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:19:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:36,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:19:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:36,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:36,357 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:19:36,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 61 [2022-02-15 14:19:36,584 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:19:36,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:19:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:36,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575353770] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:36,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:36,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:19:36,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624400841] [2022-02-15 14:19:36,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:36,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:19:36,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:19:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:19:36,695 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:37,992 INFO L93 Difference]: Finished difference Result 57979 states and 239704 transitions. [2022-02-15 14:19:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:19:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:19:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:38,253 INFO L225 Difference]: With dead ends: 57979 [2022-02-15 14:19:38,253 INFO L226 Difference]: Without dead ends: 57787 [2022-02-15 14:19:38,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:19:38,254 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 186 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:38,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 911 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 963 Invalid, 0 Unknown, 126 Unchecked, 0.7s Time] [2022-02-15 14:19:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57787 states. [2022-02-15 14:19:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57787 to 35063. [2022-02-15 14:19:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2022-02-15 14:19:39,699 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2022-02-15 14:19:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:39,699 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2022-02-15 14:19:39,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2022-02-15 14:19:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:19:40,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:40,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:40,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:40,247 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,SelfDestructingSolverStorable27 [2022-02-15 14:19:40,247 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 20 times [2022-02-15 14:19:40,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:40,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942807993] [2022-02-15 14:19:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:40,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:40,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:40,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942807993] [2022-02-15 14:19:40,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942807993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:40,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405147651] [2022-02-15 14:19:40,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:19:40,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:40,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:40,458 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) [2022-02-15 14:19:40,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 14:19:40,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:19:40,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:40,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:19:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:40,708 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:19:40,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:19:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:40,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:40,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:19:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:40,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:41,063 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:19:41,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 61 [2022-02-15 14:19:41,308 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:19:41,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:19:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:41,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405147651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:41,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:41,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 14:19:41,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929041092] [2022-02-15 14:19:41,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:41,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:19:41,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:19:41,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:19:41,412 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:42,206 INFO L93 Difference]: Finished difference Result 51473 states and 213928 transitions. [2022-02-15 14:19:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:19:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:19:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:42,427 INFO L225 Difference]: With dead ends: 51473 [2022-02-15 14:19:42,428 INFO L226 Difference]: Without dead ends: 51418 [2022-02-15 14:19:42,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:19:42,428 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 152 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:42,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 738 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 611 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-02-15 14:19:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51418 states. [2022-02-15 14:19:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51418 to 35819. [2022-02-15 14:19:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35819 states, 35818 states have (on average 4.1391479144564185) internal successors, (148256), 35818 states have internal predecessors, (148256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35819 states to 35819 states and 148256 transitions. [2022-02-15 14:19:43,757 INFO L78 Accepts]: Start accepts. Automaton has 35819 states and 148256 transitions. Word has length 39 [2022-02-15 14:19:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:43,758 INFO L470 AbstractCegarLoop]: Abstraction has 35819 states and 148256 transitions. [2022-02-15 14:19:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 35819 states and 148256 transitions. [2022-02-15 14:19:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:19:44,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:44,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:44,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:44,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-15 14:19:44,317 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash -564546565, now seen corresponding path program 21 times [2022-02-15 14:19:44,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:44,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91881390] [2022-02-15 14:19:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:44,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:44,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:44,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91881390] [2022-02-15 14:19:44,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91881390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:44,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911805410] [2022-02-15 14:19:44,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:19:44,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:44,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:44,498 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) [2022-02-15 14:19:44,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 14:19:44,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:19:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-15 14:19:44,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:44,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:44,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:44,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:19:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:45,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:45,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:19:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:45,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:45,252 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:19:45,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-02-15 14:19:45,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:45,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:45,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:45,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-02-15 14:19:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:45,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911805410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:45,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:45,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 21 [2022-02-15 14:19:45,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875702773] [2022-02-15 14:19:45,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 14:19:45,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:45,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 14:19:45,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-15 14:19:45,850 INFO L87 Difference]: Start difference. First operand 35819 states and 148256 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:46,719 INFO L93 Difference]: Finished difference Result 48198 states and 199508 transitions. [2022-02-15 14:19:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:19:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:19:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:46,915 INFO L225 Difference]: With dead ends: 48198 [2022-02-15 14:19:46,915 INFO L226 Difference]: Without dead ends: 48195 [2022-02-15 14:19:46,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:19:46,916 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 249 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:46,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 730 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 469 Invalid, 0 Unknown, 472 Unchecked, 0.2s Time] [2022-02-15 14:19:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48195 states. [2022-02-15 14:19:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48195 to 36489. [2022-02-15 14:19:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36489 states, 36488 states have (on average 4.132317474238105) internal successors, (150780), 36488 states have internal predecessors, (150780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36489 states to 36489 states and 150780 transitions. [2022-02-15 14:19:48,197 INFO L78 Accepts]: Start accepts. Automaton has 36489 states and 150780 transitions. Word has length 39 [2022-02-15 14:19:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:48,197 INFO L470 AbstractCegarLoop]: Abstraction has 36489 states and 150780 transitions. [2022-02-15 14:19:48,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 36489 states and 150780 transitions. [2022-02-15 14:19:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:19:48,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:48,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:48,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:48,707 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash -898797257, now seen corresponding path program 22 times [2022-02-15 14:19:48,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:48,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714492836] [2022-02-15 14:19:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:48,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:48,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:48,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714492836] [2022-02-15 14:19:48,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714492836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:48,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815680112] [2022-02-15 14:19:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:19:48,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:48,918 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) [2022-02-15 14:19:48,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 14:19:48,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:19:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:19:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:49,142 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:19:49,142 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 35 treesize of output 17 [2022-02-15 14:19:49,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:49,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:49,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:19:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:49,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:49,563 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:19:49,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 61 [2022-02-15 14:19:49,793 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:19:49,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:19:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:49,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815680112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:49,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:49,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 14:19:49,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776417778] [2022-02-15 14:19:49,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:49,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:19:49,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:19:49,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:19:49,886 INFO L87 Difference]: Start difference. First operand 36489 states and 150780 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:50,642 INFO L93 Difference]: Finished difference Result 55125 states and 228658 transitions. [2022-02-15 14:19:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 14:19:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:19:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:50,882 INFO L225 Difference]: With dead ends: 55125 [2022-02-15 14:19:50,882 INFO L226 Difference]: Without dead ends: 55122 [2022-02-15 14:19:50,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:19:50,883 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 169 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:50,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 664 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 545 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-02-15 14:19:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55122 states. [2022-02-15 14:19:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55122 to 36526. [2022-02-15 14:19:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36526 states, 36525 states have (on average 4.131170431211499) internal successors, (150891), 36525 states have internal predecessors, (150891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36526 states to 36526 states and 150891 transitions. [2022-02-15 14:19:52,242 INFO L78 Accepts]: Start accepts. Automaton has 36526 states and 150891 transitions. Word has length 39 [2022-02-15 14:19:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:52,242 INFO L470 AbstractCegarLoop]: Abstraction has 36526 states and 150891 transitions. [2022-02-15 14:19:52,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 36526 states and 150891 transitions. [2022-02-15 14:19:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:19:52,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:52,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:52,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:52,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:52,539 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1852048495, now seen corresponding path program 23 times [2022-02-15 14:19:52,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:52,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67672255] [2022-02-15 14:19:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:52,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:52,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:52,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67672255] [2022-02-15 14:19:52,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67672255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:52,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583897255] [2022-02-15 14:19:52,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:19:52,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:52,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:52,895 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) [2022-02-15 14:19:52,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 14:19:52,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:19:52,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-15 14:19:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:53,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:53,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:53,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:19:53,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-02-15 14:19:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:53,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:53,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2022-02-15 14:19:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:53,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:53,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:53,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:53,816 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-02-15 14:19:53,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 49 [2022-02-15 14:19:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:54,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:54,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:19:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:54,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-02-15 14:19:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:54,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583897255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:19:54,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:19:54,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-15 14:19:54,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958562630] [2022-02-15 14:19:54,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:19:54,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 14:19:54,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:19:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 14:19:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:19:54,476 INFO L87 Difference]: Start difference. First operand 36526 states and 150891 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:19:56,129 INFO L93 Difference]: Finished difference Result 51278 states and 207096 transitions. [2022-02-15 14:19:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:19:56,129 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:19:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:19:56,319 INFO L225 Difference]: With dead ends: 51278 [2022-02-15 14:19:56,319 INFO L226 Difference]: Without dead ends: 51275 [2022-02-15 14:19:56,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=417, Invalid=2339, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:19:56,321 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 469 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:19:56,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1880 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 794 Invalid, 0 Unknown, 1064 Unchecked, 0.4s Time] [2022-02-15 14:19:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51275 states. [2022-02-15 14:19:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51275 to 37103. [2022-02-15 14:19:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37103 states, 37102 states have (on average 4.124656352757264) internal successors, (153033), 37102 states have internal predecessors, (153033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37103 states to 37103 states and 153033 transitions. [2022-02-15 14:19:57,780 INFO L78 Accepts]: Start accepts. Automaton has 37103 states and 153033 transitions. Word has length 39 [2022-02-15 14:19:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:19:57,781 INFO L470 AbstractCegarLoop]: Abstraction has 37103 states and 153033 transitions. [2022-02-15 14:19:57,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:19:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 37103 states and 153033 transitions. [2022-02-15 14:19:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:19:57,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:19:57,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:19:57,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 14:19:58,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:58,087 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:19:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:19:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2088011479, now seen corresponding path program 24 times [2022-02-15 14:19:58,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:19:58,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297891733] [2022-02-15 14:19:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:19:58,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:19:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:19:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:58,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:19:58,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297891733] [2022-02-15 14:19:58,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297891733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:19:58,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317519386] [2022-02-15 14:19:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:19:58,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:19:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:19:58,225 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) [2022-02-15 14:19:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 14:19:58,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:19:58,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:19:58,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:19:58,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:19:58,456 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:19:58,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:19:58,658 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:19:58,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:19:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:19:58,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:19:59,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:19:59,359 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:19:59,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 41 [2022-02-15 14:20:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:00,213 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:20:00,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 41 [2022-02-15 14:20:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:00,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317519386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:00,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:00,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-02-15 14:20:00,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212167533] [2022-02-15 14:20:00,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:00,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:20:00,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:20:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:20:00,249 INFO L87 Difference]: Start difference. First operand 37103 states and 153033 transitions. Second operand has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:01,332 INFO L93 Difference]: Finished difference Result 57932 states and 238518 transitions. [2022-02-15 14:20:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 14:20:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:01,690 INFO L225 Difference]: With dead ends: 57932 [2022-02-15 14:20:01,690 INFO L226 Difference]: Without dead ends: 57927 [2022-02-15 14:20:01,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:20:01,691 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 379 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:01,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1174 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 641 Invalid, 0 Unknown, 620 Unchecked, 0.3s Time] [2022-02-15 14:20:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2022-02-15 14:20:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 37958. [2022-02-15 14:20:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37958 states, 37957 states have (on average 4.125694865242248) internal successors, (156599), 37957 states have internal predecessors, (156599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37958 states to 37958 states and 156599 transitions. [2022-02-15 14:20:03,152 INFO L78 Accepts]: Start accepts. Automaton has 37958 states and 156599 transitions. Word has length 39 [2022-02-15 14:20:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:03,152 INFO L470 AbstractCegarLoop]: Abstraction has 37958 states and 156599 transitions. [2022-02-15 14:20:03,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 37958 states and 156599 transitions. [2022-02-15 14:20:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:03,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:03,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:03,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:03,444 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,SelfDestructingSolverStorable32 [2022-02-15 14:20:03,445 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 25 times [2022-02-15 14:20:03,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:03,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929736106] [2022-02-15 14:20:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:03,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:03,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:03,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929736106] [2022-02-15 14:20:03,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929736106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:03,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552601738] [2022-02-15 14:20:03,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:20:03,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:03,644 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) [2022-02-15 14:20:03,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 14:20:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:03,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:03,917 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:03,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:20:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:04,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:04,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:20:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:04,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:04,409 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:04,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:04,573 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:04,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:04,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552601738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:04,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:04,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-15 14:20:04,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995400770] [2022-02-15 14:20:04,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:04,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:20:04,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:20:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:20:04,642 INFO L87 Difference]: Start difference. First operand 37958 states and 156599 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:05,677 INFO L93 Difference]: Finished difference Result 63080 states and 260703 transitions. [2022-02-15 14:20:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:20:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:06,005 INFO L225 Difference]: With dead ends: 63080 [2022-02-15 14:20:06,005 INFO L226 Difference]: Without dead ends: 62888 [2022-02-15 14:20:06,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:20:06,006 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 244 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:06,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 809 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 776 Invalid, 0 Unknown, 203 Unchecked, 0.4s Time] [2022-02-15 14:20:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62888 states. [2022-02-15 14:20:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62888 to 38305. [2022-02-15 14:20:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 4.1239818295739346) internal successors, (157965), 38304 states have internal predecessors, (157965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 157965 transitions. [2022-02-15 14:20:07,404 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 157965 transitions. Word has length 39 [2022-02-15 14:20:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:07,405 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 157965 transitions. [2022-02-15 14:20:07,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 157965 transitions. [2022-02-15 14:20:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:07,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:07,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:07,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-15 14:20:07,695 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,SelfDestructingSolverStorable33 [2022-02-15 14:20:07,695 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 26 times [2022-02-15 14:20:07,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:07,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813592946] [2022-02-15 14:20:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:07,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:07,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:07,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813592946] [2022-02-15 14:20:07,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813592946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:07,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993954027] [2022-02-15 14:20:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:20:07,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:07,842 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) [2022-02-15 14:20:07,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 14:20:07,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:20:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:08,069 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:08,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:20:08,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:08,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:08,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:08,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:20:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:08,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:08,524 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:08,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:08,672 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:08,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:08,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993954027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:08,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:08,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:20:08,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421913387] [2022-02-15 14:20:08,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:08,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:20:08,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:20:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:20:08,755 INFO L87 Difference]: Start difference. First operand 38305 states and 157965 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:09,584 INFO L93 Difference]: Finished difference Result 56963 states and 236485 transitions. [2022-02-15 14:20:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:20:09,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:09,895 INFO L225 Difference]: With dead ends: 56963 [2022-02-15 14:20:09,895 INFO L226 Difference]: Without dead ends: 56908 [2022-02-15 14:20:09,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:20:09,895 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 180 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:09,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 829 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 788 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-02-15 14:20:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56908 states. [2022-02-15 14:20:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56908 to 39165. [2022-02-15 14:20:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39165 states, 39164 states have (on average 4.132264324379532) internal successors, (161836), 39164 states have internal predecessors, (161836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39165 states to 39165 states and 161836 transitions. [2022-02-15 14:20:11,378 INFO L78 Accepts]: Start accepts. Automaton has 39165 states and 161836 transitions. Word has length 39 [2022-02-15 14:20:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:11,379 INFO L470 AbstractCegarLoop]: Abstraction has 39165 states and 161836 transitions. [2022-02-15 14:20:11,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 39165 states and 161836 transitions. [2022-02-15 14:20:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:11,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:11,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:11,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:11,703 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,SelfDestructingSolverStorable34 [2022-02-15 14:20:11,704 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1182829453, now seen corresponding path program 27 times [2022-02-15 14:20:11,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:11,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626126026] [2022-02-15 14:20:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:11,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:11,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:11,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626126026] [2022-02-15 14:20:11,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626126026] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:11,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518819226] [2022-02-15 14:20:11,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:20:11,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:11,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:11,920 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) [2022-02-15 14:20:11,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 14:20:11,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:20:11,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:11,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:11,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:12,200 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:20:12,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 17 [2022-02-15 14:20:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:12,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:12,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:20:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:12,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:12,575 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:12,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:12,940 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:12,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:13,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518819226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:13,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:13,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:20:13,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158664377] [2022-02-15 14:20:13,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:13,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:20:13,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:20:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:20:13,017 INFO L87 Difference]: Start difference. First operand 39165 states and 161836 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:13,727 INFO L93 Difference]: Finished difference Result 59031 states and 245063 transitions. [2022-02-15 14:20:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:20:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:14,244 INFO L225 Difference]: With dead ends: 59031 [2022-02-15 14:20:14,246 INFO L226 Difference]: Without dead ends: 58976 [2022-02-15 14:20:14,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:20:14,247 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 212 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:14,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 631 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 677 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-02-15 14:20:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58976 states. [2022-02-15 14:20:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58976 to 39342. [2022-02-15 14:20:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39342 states, 39341 states have (on average 4.132457232912229) internal successors, (162575), 39341 states have internal predecessors, (162575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39342 states to 39342 states and 162575 transitions. [2022-02-15 14:20:15,703 INFO L78 Accepts]: Start accepts. Automaton has 39342 states and 162575 transitions. Word has length 39 [2022-02-15 14:20:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:15,704 INFO L470 AbstractCegarLoop]: Abstraction has 39342 states and 162575 transitions. [2022-02-15 14:20:15,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 39342 states and 162575 transitions. [2022-02-15 14:20:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:15,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:15,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:15,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:16,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:16,022 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash 848578761, now seen corresponding path program 28 times [2022-02-15 14:20:16,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:16,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788501456] [2022-02-15 14:20:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:16,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:16,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:16,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788501456] [2022-02-15 14:20:16,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788501456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:16,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165159000] [2022-02-15 14:20:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:20:16,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:16,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:16,232 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) [2022-02-15 14:20:16,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 14:20:16,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:20:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:16,485 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:16,485 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 35 treesize of output 17 [2022-02-15 14:20:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:16,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:16,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:20:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:16,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:16,978 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:16,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:17,171 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:17,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:17,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165159000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:17,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:17,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:20:17,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830397678] [2022-02-15 14:20:17,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:17,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:20:17,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:20:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:20:17,227 INFO L87 Difference]: Start difference. First operand 39342 states and 162575 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:18,160 INFO L93 Difference]: Finished difference Result 63278 states and 263252 transitions. [2022-02-15 14:20:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:20:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:18,631 INFO L225 Difference]: With dead ends: 63278 [2022-02-15 14:20:18,631 INFO L226 Difference]: Without dead ends: 63223 [2022-02-15 14:20:18,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:20:18,631 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 219 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:18,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 769 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 810 Invalid, 0 Unknown, 316 Unchecked, 0.3s Time] [2022-02-15 14:20:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63223 states. [2022-02-15 14:20:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63223 to 38860. [2022-02-15 14:20:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38860 states, 38859 states have (on average 4.133868601868293) internal successors, (160638), 38859 states have internal predecessors, (160638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38860 states to 38860 states and 160638 transitions. [2022-02-15 14:20:20,070 INFO L78 Accepts]: Start accepts. Automaton has 38860 states and 160638 transitions. Word has length 39 [2022-02-15 14:20:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:20,071 INFO L470 AbstractCegarLoop]: Abstraction has 38860 states and 160638 transitions. [2022-02-15 14:20:20,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand 38860 states and 160638 transitions. [2022-02-15 14:20:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:20,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:20,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:20,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:20,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-15 14:20:20,391 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 29 times [2022-02-15 14:20:20,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:20,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857602521] [2022-02-15 14:20:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:20,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:20,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:20,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857602521] [2022-02-15 14:20:20,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857602521] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:20,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745575643] [2022-02-15 14:20:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:20:20,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:20,652 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) [2022-02-15 14:20:20,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 14:20:20,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:20:20,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:20,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-15 14:20:20,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:20,905 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:20:20,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2022-02-15 14:20:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:21,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:20:21,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2022-02-15 14:20:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:21,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:21,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:21,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:21,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2022-02-15 14:20:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:22,370 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:20:22,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 39 [2022-02-15 14:20:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:22,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745575643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:22,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:22,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-15 14:20:22,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085561096] [2022-02-15 14:20:22,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:22,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 14:20:22,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 14:20:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-02-15 14:20:22,402 INFO L87 Difference]: Start difference. First operand 38860 states and 160638 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:24,652 INFO L93 Difference]: Finished difference Result 88850 states and 370487 transitions. [2022-02-15 14:20:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:20:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:25,094 INFO L225 Difference]: With dead ends: 88850 [2022-02-15 14:20:25,095 INFO L226 Difference]: Without dead ends: 88510 [2022-02-15 14:20:25,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=479, Invalid=3061, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:20:25,096 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 758 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1795 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:25,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1726 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1032 Invalid, 0 Unknown, 1795 Unchecked, 0.5s Time] [2022-02-15 14:20:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88510 states. [2022-02-15 14:20:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88510 to 39284. [2022-02-15 14:20:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39284 states, 39283 states have (on average 4.129165287783519) internal successors, (162206), 39283 states have internal predecessors, (162206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39284 states to 39284 states and 162206 transitions. [2022-02-15 14:20:26,956 INFO L78 Accepts]: Start accepts. Automaton has 39284 states and 162206 transitions. Word has length 39 [2022-02-15 14:20:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:26,956 INFO L470 AbstractCegarLoop]: Abstraction has 39284 states and 162206 transitions. [2022-02-15 14:20:26,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 39284 states and 162206 transitions. [2022-02-15 14:20:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:27,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:27,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:27,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:27,247 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,SelfDestructingSolverStorable37 [2022-02-15 14:20:27,247 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash -156228847, now seen corresponding path program 30 times [2022-02-15 14:20:27,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:27,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585964732] [2022-02-15 14:20:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:27,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:27,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:27,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585964732] [2022-02-15 14:20:27,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585964732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:27,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927246932] [2022-02-15 14:20:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:20:27,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:27,406 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) [2022-02-15 14:20:27,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 14:20:27,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 14:20:27,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:27,734 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:20:27,734 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 70 treesize of output 38 [2022-02-15 14:20:27,763 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:27,763 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 35 treesize of output 17 [2022-02-15 14:20:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:27,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:27,930 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:27,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-15 14:20:28,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:28,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:28,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927246932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:28,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:28,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-15 14:20:28,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499073374] [2022-02-15 14:20:28,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:28,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:20:28,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:28,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:20:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:20:28,166 INFO L87 Difference]: Start difference. First operand 39284 states and 162206 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:29,230 INFO L93 Difference]: Finished difference Result 67397 states and 278775 transitions. [2022-02-15 14:20:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:20:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:29,788 INFO L225 Difference]: With dead ends: 67397 [2022-02-15 14:20:29,788 INFO L226 Difference]: Without dead ends: 67237 [2022-02-15 14:20:29,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:20:29,788 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:29,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 672 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:20:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67237 states. [2022-02-15 14:20:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67237 to 39564. [2022-02-15 14:20:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39564 states, 39563 states have (on average 4.127846725475823) internal successors, (163310), 39563 states have internal predecessors, (163310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39564 states to 39564 states and 163310 transitions. [2022-02-15 14:20:31,283 INFO L78 Accepts]: Start accepts. Automaton has 39564 states and 163310 transitions. Word has length 39 [2022-02-15 14:20:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:31,283 INFO L470 AbstractCegarLoop]: Abstraction has 39564 states and 163310 transitions. [2022-02-15 14:20:31,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 39564 states and 163310 transitions. [2022-02-15 14:20:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:31,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:31,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:31,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:31,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-15 14:20:31,597 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 31 times [2022-02-15 14:20:31,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:31,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611314481] [2022-02-15 14:20:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:31,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:31,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:31,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611314481] [2022-02-15 14:20:31,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611314481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:31,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449572596] [2022-02-15 14:20:31,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:20:31,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:31,783 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) [2022-02-15 14:20:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:31,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 14:20:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:32,174 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:32,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 33 [2022-02-15 14:20:32,197 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:32,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-02-15 14:20:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:32,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:32,389 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:32,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:32,550 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:32,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:32,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449572596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:32,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:32,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-15 14:20:32,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524453951] [2022-02-15 14:20:32,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:32,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:20:32,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:32,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:20:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:20:32,608 INFO L87 Difference]: Start difference. First operand 39564 states and 163310 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:33,552 INFO L93 Difference]: Finished difference Result 67175 states and 277414 transitions. [2022-02-15 14:20:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:20:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:34,001 INFO L225 Difference]: With dead ends: 67175 [2022-02-15 14:20:34,001 INFO L226 Difference]: Without dead ends: 67085 [2022-02-15 14:20:34,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:20:34,002 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 249 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:34,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 763 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:20:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67085 states. [2022-02-15 14:20:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67085 to 39570. [2022-02-15 14:20:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39570 states, 39569 states have (on average 4.1304051151153685) internal successors, (163436), 39569 states have internal predecessors, (163436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39570 states to 39570 states and 163436 transitions. [2022-02-15 14:20:35,385 INFO L78 Accepts]: Start accepts. Automaton has 39570 states and 163436 transitions. Word has length 39 [2022-02-15 14:20:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:35,385 INFO L470 AbstractCegarLoop]: Abstraction has 39570 states and 163436 transitions. [2022-02-15 14:20:35,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 39570 states and 163436 transitions. [2022-02-15 14:20:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:35,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:35,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:35,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:35,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-15 14:20:35,705 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash -249818799, now seen corresponding path program 32 times [2022-02-15 14:20:35,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:35,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589491007] [2022-02-15 14:20:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:35,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:35,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:35,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589491007] [2022-02-15 14:20:35,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589491007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:35,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250463420] [2022-02-15 14:20:35,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:20:35,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:35,859 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) [2022-02-15 14:20:35,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 14:20:35,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:20:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:36,201 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:36,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-02-15 14:20:36,258 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:36,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:20:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:36,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:36,441 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:36,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:36,655 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:36,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:36,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250463420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:36,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:36,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:20:36,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070245025] [2022-02-15 14:20:36,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:36,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:20:36,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:20:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:20:36,733 INFO L87 Difference]: Start difference. First operand 39570 states and 163436 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:37,656 INFO L93 Difference]: Finished difference Result 55429 states and 230154 transitions. [2022-02-15 14:20:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 14:20:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:37,875 INFO L225 Difference]: With dead ends: 55429 [2022-02-15 14:20:37,875 INFO L226 Difference]: Without dead ends: 55374 [2022-02-15 14:20:37,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:20:37,876 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 162 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:37,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 658 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:20:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55374 states. [2022-02-15 14:20:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55374 to 39590. [2022-02-15 14:20:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39590 states, 39589 states have (on average 4.127106014296901) internal successors, (163388), 39589 states have internal predecessors, (163388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39590 states to 39590 states and 163388 transitions. [2022-02-15 14:20:39,183 INFO L78 Accepts]: Start accepts. Automaton has 39590 states and 163388 transitions. Word has length 39 [2022-02-15 14:20:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:39,183 INFO L470 AbstractCegarLoop]: Abstraction has 39590 states and 163388 transitions. [2022-02-15 14:20:39,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 39590 states and 163388 transitions. [2022-02-15 14:20:39,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:39,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:39,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:39,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:39,487 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,SelfDestructingSolverStorable40 [2022-02-15 14:20:39,487 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1106922573, now seen corresponding path program 33 times [2022-02-15 14:20:39,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:39,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76146102] [2022-02-15 14:20:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:39,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:39,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:39,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76146102] [2022-02-15 14:20:39,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76146102] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:39,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337838667] [2022-02-15 14:20:39,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:20:39,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:39,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:39,732 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) [2022-02-15 14:20:39,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 14:20:39,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 14:20:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:39,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-15 14:20:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:40,266 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:20:40,267 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 66 treesize of output 34 [2022-02-15 14:20:40,322 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:20:40,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:20:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:40,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:41,183 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:20:41,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 47 [2022-02-15 14:20:41,368 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:41,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-02-15 14:20:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:41,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337838667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:41,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:41,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 14:20:41,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605467084] [2022-02-15 14:20:41,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:41,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:20:41,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:20:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:20:41,427 INFO L87 Difference]: Start difference. First operand 39590 states and 163388 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:42,498 INFO L93 Difference]: Finished difference Result 68005 states and 281081 transitions. [2022-02-15 14:20:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 14:20:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:42,783 INFO L225 Difference]: With dead ends: 68005 [2022-02-15 14:20:42,783 INFO L226 Difference]: Without dead ends: 67950 [2022-02-15 14:20:42,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:20:42,784 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 338 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:42,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 903 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 549 Invalid, 0 Unknown, 433 Unchecked, 0.3s Time] [2022-02-15 14:20:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67950 states. [2022-02-15 14:20:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67950 to 40559. [2022-02-15 14:20:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40559 states, 40558 states have (on average 4.133315252231372) internal successors, (167639), 40558 states have internal predecessors, (167639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40559 states to 40559 states and 167639 transitions. [2022-02-15 14:20:44,165 INFO L78 Accepts]: Start accepts. Automaton has 40559 states and 167639 transitions. Word has length 39 [2022-02-15 14:20:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:44,165 INFO L470 AbstractCegarLoop]: Abstraction has 40559 states and 167639 transitions. [2022-02-15 14:20:44,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 40559 states and 167639 transitions. [2022-02-15 14:20:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:44,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:44,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:44,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:44,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:44,696 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash -326398011, now seen corresponding path program 34 times [2022-02-15 14:20:44,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:44,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239285039] [2022-02-15 14:20:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:44,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:44,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:44,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239285039] [2022-02-15 14:20:44,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239285039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:44,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082347523] [2022-02-15 14:20:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:20:44,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:44,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:44,836 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) [2022-02-15 14:20:44,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 14:20:44,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:20:44,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:45,188 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:45,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 38 [2022-02-15 14:20:45,255 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:45,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:20:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:45,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:45,421 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:45,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:45,614 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:45,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:20:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:45,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082347523] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:45,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:45,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:20:45,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863760867] [2022-02-15 14:20:45,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:45,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:20:45,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:20:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:20:45,672 INFO L87 Difference]: Start difference. First operand 40559 states and 167639 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:46,746 INFO L93 Difference]: Finished difference Result 68421 states and 284264 transitions. [2022-02-15 14:20:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 14:20:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:47,036 INFO L225 Difference]: With dead ends: 68421 [2022-02-15 14:20:47,036 INFO L226 Difference]: Without dead ends: 68366 [2022-02-15 14:20:47,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:20:47,038 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 191 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:47,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 698 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:20:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68366 states. [2022-02-15 14:20:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68366 to 39838. [2022-02-15 14:20:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39838 states, 39837 states have (on average 4.128724552551648) internal successors, (164476), 39837 states have internal predecessors, (164476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39838 states to 39838 states and 164476 transitions. [2022-02-15 14:20:48,551 INFO L78 Accepts]: Start accepts. Automaton has 39838 states and 164476 transitions. Word has length 39 [2022-02-15 14:20:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:48,552 INFO L470 AbstractCegarLoop]: Abstraction has 39838 states and 164476 transitions. [2022-02-15 14:20:48,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 39838 states and 164476 transitions. [2022-02-15 14:20:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:48,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:48,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:48,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:48,845 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,SelfDestructingSolverStorable42 [2022-02-15 14:20:48,845 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1698692599, now seen corresponding path program 35 times [2022-02-15 14:20:48,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:48,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338505307] [2022-02-15 14:20:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:48,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:48,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:48,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338505307] [2022-02-15 14:20:48,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338505307] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:48,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835651847] [2022-02-15 14:20:48,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:20:48,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:48,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:48,993 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) [2022-02-15 14:20:48,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 14:20:49,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 14:20:49,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:20:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:49,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:49,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:49,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2022-02-15 14:20:49,592 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:20:49,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2022-02-15 14:20:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:49,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:50,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:50,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:50,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:50,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:20:50,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 61 [2022-02-15 14:20:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:50,764 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:20:50,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-15 14:20:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:50,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835651847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:50,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:50,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-02-15 14:20:50,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557276893] [2022-02-15 14:20:50,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:50,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:20:50,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:20:50,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:20:50,837 INFO L87 Difference]: Start difference. First operand 39838 states and 164476 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:51,930 INFO L93 Difference]: Finished difference Result 51641 states and 212244 transitions. [2022-02-15 14:20:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:20:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:52,132 INFO L225 Difference]: With dead ends: 51641 [2022-02-15 14:20:52,132 INFO L226 Difference]: Without dead ends: 51586 [2022-02-15 14:20:52,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:20:52,133 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 345 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 741 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:52,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1731 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 357 Invalid, 0 Unknown, 741 Unchecked, 0.1s Time] [2022-02-15 14:20:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51586 states. [2022-02-15 14:20:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51586 to 40560. [2022-02-15 14:20:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40560 states, 40559 states have (on average 4.132596957518676) internal successors, (167614), 40559 states have internal predecessors, (167614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40560 states to 40560 states and 167614 transitions. [2022-02-15 14:20:53,401 INFO L78 Accepts]: Start accepts. Automaton has 40560 states and 167614 transitions. Word has length 39 [2022-02-15 14:20:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:53,401 INFO L470 AbstractCegarLoop]: Abstraction has 40560 states and 167614 transitions. [2022-02-15 14:20:53,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 40560 states and 167614 transitions. [2022-02-15 14:20:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:53,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:53,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:53,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:53,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:53,717 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 421713277, now seen corresponding path program 36 times [2022-02-15 14:20:53,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:53,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113766954] [2022-02-15 14:20:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:53,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:53,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:53,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113766954] [2022-02-15 14:20:53,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113766954] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:53,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106956013] [2022-02-15 14:20:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:20:53,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:53,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:53,868 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) [2022-02-15 14:20:53,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 14:20:53,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 14:20:53,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:20:53,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:20:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:20:54,627 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:20:54,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 39 [2022-02-15 14:20:54,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:20:54,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2022-02-15 14:20:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:54,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:20:54,917 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:20:54,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:20:55,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:55,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:55,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:20:55,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:20:55,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 52 [2022-02-15 14:20:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:55,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106956013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:20:55,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:20:55,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-15 14:20:55,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912345058] [2022-02-15 14:20:55,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:20:55,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:20:55,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:20:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:20:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:20:55,425 INFO L87 Difference]: Start difference. First operand 40560 states and 167614 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:20:56,715 INFO L93 Difference]: Finished difference Result 79721 states and 325587 transitions. [2022-02-15 14:20:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:20:56,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:20:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:20:56,999 INFO L225 Difference]: With dead ends: 79721 [2022-02-15 14:20:56,999 INFO L226 Difference]: Without dead ends: 79692 [2022-02-15 14:20:57,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 14:20:57,000 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 433 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:20:57,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1498 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 714 Invalid, 0 Unknown, 850 Unchecked, 0.3s Time] [2022-02-15 14:20:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79692 states. [2022-02-15 14:20:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79692 to 46375. [2022-02-15 14:20:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46375 states, 46374 states have (on average 4.153167723293224) internal successors, (192599), 46374 states have internal predecessors, (192599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46375 states to 46375 states and 192599 transitions. [2022-02-15 14:20:58,862 INFO L78 Accepts]: Start accepts. Automaton has 46375 states and 192599 transitions. Word has length 39 [2022-02-15 14:20:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:20:58,862 INFO L470 AbstractCegarLoop]: Abstraction has 46375 states and 192599 transitions. [2022-02-15 14:20:58,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:20:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 46375 states and 192599 transitions. [2022-02-15 14:20:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:20:58,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:20:58,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:20:58,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 14:20:59,176 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,SelfDestructingSolverStorable44 [2022-02-15 14:20:59,176 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:20:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:20:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1911684639, now seen corresponding path program 37 times [2022-02-15 14:20:59,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:20:59,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629932421] [2022-02-15 14:20:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:20:59,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:20:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:20:59,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:20:59,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629932421] [2022-02-15 14:20:59,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629932421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:20:59,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191527119] [2022-02-15 14:20:59,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:20:59,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:20:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:20:59,344 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) [2022-02-15 14:20:59,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 14:20:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:20:59,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:20:59,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:00,057 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:00,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 33 [2022-02-15 14:21:00,101 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:00,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-02-15 14:21:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:00,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:00,274 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:00,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:21:00,475 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:00,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:21:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:00,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191527119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:00,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:00,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:21:00,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022090440] [2022-02-15 14:21:00,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:00,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:21:00,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:21:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:21:00,543 INFO L87 Difference]: Start difference. First operand 46375 states and 192599 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:01,617 INFO L93 Difference]: Finished difference Result 72287 states and 301044 transitions. [2022-02-15 14:21:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 14:21:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:02,040 INFO L225 Difference]: With dead ends: 72287 [2022-02-15 14:21:02,040 INFO L226 Difference]: Without dead ends: 72232 [2022-02-15 14:21:02,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:21:02,041 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 151 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:02,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 800 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:21:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72232 states. [2022-02-15 14:21:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72232 to 44169. [2022-02-15 14:21:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44169 states, 44168 states have (on average 4.1557009599710195) internal successors, (183549), 44168 states have internal predecessors, (183549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44169 states to 44169 states and 183549 transitions. [2022-02-15 14:21:03,674 INFO L78 Accepts]: Start accepts. Automaton has 44169 states and 183549 transitions. Word has length 39 [2022-02-15 14:21:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:03,674 INFO L470 AbstractCegarLoop]: Abstraction has 44169 states and 183549 transitions. [2022-02-15 14:21:03,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 44169 states and 183549 transitions. [2022-02-15 14:21:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:04,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:04,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:04,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:04,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-15 14:21:04,266 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:04,267 INFO L85 PathProgramCache]: Analyzing trace with hash -150753277, now seen corresponding path program 38 times [2022-02-15 14:21:04,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:04,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033206089] [2022-02-15 14:21:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:04,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:04,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:04,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033206089] [2022-02-15 14:21:04,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033206089] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:04,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851477171] [2022-02-15 14:21:04,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:21:04,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:04,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:04,508 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) [2022-02-15 14:21:04,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 14:21:04,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:21:04,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:04,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:21:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:04,817 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:04,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-02-15 14:21:04,900 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:04,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:21:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:04,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:05,097 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:05,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-02-15 14:21:05,261 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:05,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:21:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:05,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851477171] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:05,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:05,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-15 14:21:05,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70069428] [2022-02-15 14:21:05,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:05,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 14:21:05,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 14:21:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-15 14:21:05,375 INFO L87 Difference]: Start difference. First operand 44169 states and 183549 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:06,474 INFO L93 Difference]: Finished difference Result 78189 states and 324845 transitions. [2022-02-15 14:21:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:21:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:06,794 INFO L225 Difference]: With dead ends: 78189 [2022-02-15 14:21:06,794 INFO L226 Difference]: Without dead ends: 77973 [2022-02-15 14:21:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:21:06,795 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 218 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:06,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 916 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:21:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77973 states. [2022-02-15 14:21:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77973 to 43817. [2022-02-15 14:21:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43817 states, 43816 states have (on average 4.159325360598868) internal successors, (182245), 43816 states have internal predecessors, (182245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43817 states to 43817 states and 182245 transitions. [2022-02-15 14:21:08,602 INFO L78 Accepts]: Start accepts. Automaton has 43817 states and 182245 transitions. Word has length 39 [2022-02-15 14:21:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:08,602 INFO L470 AbstractCegarLoop]: Abstraction has 43817 states and 182245 transitions. [2022-02-15 14:21:08,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43817 states and 182245 transitions. [2022-02-15 14:21:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:08,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:08,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:08,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:08,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-15 14:21:08,923 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -320883415, now seen corresponding path program 39 times [2022-02-15 14:21:08,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:08,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365236237] [2022-02-15 14:21:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:08,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:09,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:09,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365236237] [2022-02-15 14:21:09,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365236237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:09,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882917612] [2022-02-15 14:21:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:21:09,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:09,067 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) [2022-02-15 14:21:09,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 14:21:09,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:21:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:21:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:09,323 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:21:09,324 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 41 treesize of output 17 [2022-02-15 14:21:09,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:09,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:09,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:21:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:09,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:09,649 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:09,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-02-15 14:21:09,889 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:09,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:21:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:09,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882917612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:09,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:09,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 14:21:09,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641409794] [2022-02-15 14:21:09,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:09,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:21:09,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:21:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:21:09,949 INFO L87 Difference]: Start difference. First operand 43817 states and 182245 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:10,764 INFO L93 Difference]: Finished difference Result 59210 states and 246913 transitions. [2022-02-15 14:21:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:21:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:11,020 INFO L225 Difference]: With dead ends: 59210 [2022-02-15 14:21:11,021 INFO L226 Difference]: Without dead ends: 59207 [2022-02-15 14:21:11,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:21:11,021 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 138 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:11,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 755 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 650 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2022-02-15 14:21:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59207 states. [2022-02-15 14:21:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59207 to 42815. [2022-02-15 14:21:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42815 states, 42814 states have (on average 4.16889335264166) internal successors, (178487), 42814 states have internal predecessors, (178487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42815 states to 42815 states and 178487 transitions. [2022-02-15 14:21:12,375 INFO L78 Accepts]: Start accepts. Automaton has 42815 states and 178487 transitions. Word has length 39 [2022-02-15 14:21:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 42815 states and 178487 transitions. [2022-02-15 14:21:12,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 42815 states and 178487 transitions. [2022-02-15 14:21:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:12,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:12,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:12,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:12,959 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,SelfDestructingSolverStorable47 [2022-02-15 14:21:12,959 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2139636749, now seen corresponding path program 40 times [2022-02-15 14:21:12,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:12,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451003247] [2022-02-15 14:21:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:12,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:13,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:13,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451003247] [2022-02-15 14:21:13,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451003247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:13,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075461464] [2022-02-15 14:21:13,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:21:13,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:13,128 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) [2022-02-15 14:21:13,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 14:21:13,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:21:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:21:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:13,388 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:13,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2022-02-15 14:21:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:13,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:13,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:13,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:21:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:13,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:13,813 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:13,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:21:13,993 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:13,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:21:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:14,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075461464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:14,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:14,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:21:14,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202687224] [2022-02-15 14:21:14,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:14,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:21:14,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:14,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:21:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:21:14,048 INFO L87 Difference]: Start difference. First operand 42815 states and 178487 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:15,489 INFO L93 Difference]: Finished difference Result 74101 states and 308133 transitions. [2022-02-15 14:21:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 14:21:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:15,807 INFO L225 Difference]: With dead ends: 74101 [2022-02-15 14:21:15,807 INFO L226 Difference]: Without dead ends: 73909 [2022-02-15 14:21:15,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:21:15,808 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 240 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:15,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1013 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1044 Invalid, 0 Unknown, 219 Unchecked, 0.6s Time] [2022-02-15 14:21:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73909 states. [2022-02-15 14:21:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73909 to 43364. [2022-02-15 14:21:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43364 states, 43363 states have (on average 4.1659709890920835) internal successors, (180649), 43363 states have internal predecessors, (180649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43364 states to 43364 states and 180649 transitions. [2022-02-15 14:21:17,937 INFO L78 Accepts]: Start accepts. Automaton has 43364 states and 180649 transitions. Word has length 39 [2022-02-15 14:21:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:17,938 INFO L470 AbstractCegarLoop]: Abstraction has 43364 states and 180649 transitions. [2022-02-15 14:21:17,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43364 states and 180649 transitions. [2022-02-15 14:21:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:18,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:18,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:18,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:18,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-15 14:21:18,263 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -577392495, now seen corresponding path program 41 times [2022-02-15 14:21:18,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:18,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435106495] [2022-02-15 14:21:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:18,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:18,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:18,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435106495] [2022-02-15 14:21:18,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435106495] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:18,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080638825] [2022-02-15 14:21:18,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:21:18,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:18,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:18,471 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) [2022-02-15 14:21:18,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 14:21:18,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 14:21:18,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:21:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:18,733 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:21:18,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:21:18,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:18,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 14:21:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:18,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:19,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:19,858 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-02-15 14:21:19,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 61 [2022-02-15 14:21:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:20,459 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:21:20,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-15 14:21:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:20,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080638825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:20,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:20,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-15 14:21:20,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504336742] [2022-02-15 14:21:20,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:20,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 14:21:20,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 14:21:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:21:20,524 INFO L87 Difference]: Start difference. First operand 43364 states and 180649 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:21,386 INFO L93 Difference]: Finished difference Result 55937 states and 230855 transitions. [2022-02-15 14:21:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:21:21,387 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:21,643 INFO L225 Difference]: With dead ends: 55937 [2022-02-15 14:21:21,643 INFO L226 Difference]: Without dead ends: 55882 [2022-02-15 14:21:21,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:21:21,644 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 422 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 640 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:21,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 1039 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 360 Invalid, 0 Unknown, 640 Unchecked, 0.2s Time] [2022-02-15 14:21:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55882 states. [2022-02-15 14:21:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55882 to 44079. [2022-02-15 14:21:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44079 states, 44078 states have (on average 4.159240437406416) internal successors, (183331), 44078 states have internal predecessors, (183331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44079 states to 44079 states and 183331 transitions. [2022-02-15 14:21:23,038 INFO L78 Accepts]: Start accepts. Automaton has 44079 states and 183331 transitions. Word has length 39 [2022-02-15 14:21:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:23,038 INFO L470 AbstractCegarLoop]: Abstraction has 44079 states and 183331 transitions. [2022-02-15 14:21:23,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 44079 states and 183331 transitions. [2022-02-15 14:21:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:23,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:23,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:23,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-15 14:21:23,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-15 14:21:23,349 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2010713079, now seen corresponding path program 42 times [2022-02-15 14:21:23,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:23,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693200128] [2022-02-15 14:21:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:23,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:23,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:23,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693200128] [2022-02-15 14:21:23,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693200128] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:23,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211554811] [2022-02-15 14:21:23,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:21:23,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:23,518 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) [2022-02-15 14:21:23,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 14:21:23,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:21:23,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:21:23,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:23,764 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:21:23,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:21:23,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:23,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:21:23,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-02-15 14:21:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:24,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:24,600 INFO L353 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-02-15 14:21:24,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 45 [2022-02-15 14:21:25,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:25,119 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:21:25,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 14:21:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:25,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211554811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:25,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:25,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-02-15 14:21:25,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191619732] [2022-02-15 14:21:25,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:25,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:21:25,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:21:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:21:25,162 INFO L87 Difference]: Start difference. First operand 44079 states and 183331 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:26,156 INFO L93 Difference]: Finished difference Result 63896 states and 263859 transitions. [2022-02-15 14:21:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:21:26,157 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:26,430 INFO L225 Difference]: With dead ends: 63896 [2022-02-15 14:21:26,430 INFO L226 Difference]: Without dead ends: 63893 [2022-02-15 14:21:26,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:21:26,431 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 391 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:26,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1161 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 496 Invalid, 0 Unknown, 385 Unchecked, 0.2s Time] [2022-02-15 14:21:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63893 states. [2022-02-15 14:21:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63893 to 51359. [2022-02-15 14:21:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51359 states, 51358 states have (on average 4.154815218661163) internal successors, (213383), 51358 states have internal predecessors, (213383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51359 states to 51359 states and 213383 transitions. [2022-02-15 14:21:28,207 INFO L78 Accepts]: Start accepts. Automaton has 51359 states and 213383 transitions. Word has length 39 [2022-02-15 14:21:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:28,208 INFO L470 AbstractCegarLoop]: Abstraction has 51359 states and 213383 transitions. [2022-02-15 14:21:28,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 51359 states and 213383 transitions. [2022-02-15 14:21:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:28,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:28,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:28,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:28,559 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,SelfDestructingSolverStorable50 [2022-02-15 14:21:28,560 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash 567694449, now seen corresponding path program 43 times [2022-02-15 14:21:28,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:28,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839875282] [2022-02-15 14:21:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:28,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:28,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:28,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839875282] [2022-02-15 14:21:28,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839875282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:28,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267444352] [2022-02-15 14:21:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:21:28,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:28,723 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) [2022-02-15 14:21:28,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 14:21:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:21:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:29,023 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:29,024 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 39 treesize of output 21 [2022-02-15 14:21:29,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:29,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:21:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:29,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:29,441 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:29,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:21:29,641 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:29,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:21:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:29,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267444352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:29,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:29,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:21:29,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800273634] [2022-02-15 14:21:29,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:29,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:21:29,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:21:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:21:29,710 INFO L87 Difference]: Start difference. First operand 51359 states and 213383 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:30,687 INFO L93 Difference]: Finished difference Result 81215 states and 338205 transitions. [2022-02-15 14:21:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:21:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:31,270 INFO L225 Difference]: With dead ends: 81215 [2022-02-15 14:21:31,271 INFO L226 Difference]: Without dead ends: 81160 [2022-02-15 14:21:31,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:21:31,271 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 214 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:31,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 713 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 534 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2022-02-15 14:21:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81160 states. [2022-02-15 14:21:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81160 to 55887. [2022-02-15 14:21:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55887 states, 55886 states have (on average 4.162956733350034) internal successors, (232651), 55886 states have internal predecessors, (232651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55887 states to 55887 states and 232651 transitions. [2022-02-15 14:21:33,632 INFO L78 Accepts]: Start accepts. Automaton has 55887 states and 232651 transitions. Word has length 39 [2022-02-15 14:21:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:33,632 INFO L470 AbstractCegarLoop]: Abstraction has 55887 states and 232651 transitions. [2022-02-15 14:21:33,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 55887 states and 232651 transitions. [2022-02-15 14:21:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:33,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:33,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:33,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:34,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:34,020 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash 797557105, now seen corresponding path program 44 times [2022-02-15 14:21:34,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:34,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802394231] [2022-02-15 14:21:34,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:34,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:34,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:34,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802394231] [2022-02-15 14:21:34,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802394231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:34,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628353048] [2022-02-15 14:21:34,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:21:34,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:34,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:34,193 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) [2022-02-15 14:21:34,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 14:21:34,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:21:34,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:34,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-15 14:21:34,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:34,450 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:34,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:21:34,549 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:21:34,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:21:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:34,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:35,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:35,610 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:21:35,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-02-15 14:21:35,747 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:35,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-02-15 14:21:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:35,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628353048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:35,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:35,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 14:21:35,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881298715] [2022-02-15 14:21:35,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:35,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:21:35,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:21:35,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:21:35,806 INFO L87 Difference]: Start difference. First operand 55887 states and 232651 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:37,175 INFO L93 Difference]: Finished difference Result 98559 states and 411337 transitions. [2022-02-15 14:21:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 14:21:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:37,631 INFO L225 Difference]: With dead ends: 98559 [2022-02-15 14:21:37,632 INFO L226 Difference]: Without dead ends: 98504 [2022-02-15 14:21:37,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:21:37,632 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 527 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:37,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 889 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 778 Invalid, 0 Unknown, 588 Unchecked, 0.3s Time] [2022-02-15 14:21:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98504 states. [2022-02-15 14:21:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98504 to 57690. [2022-02-15 14:21:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57690 states, 57689 states have (on average 4.167033576591725) internal successors, (240392), 57689 states have internal predecessors, (240392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57690 states to 57690 states and 240392 transitions. [2022-02-15 14:21:40,294 INFO L78 Accepts]: Start accepts. Automaton has 57690 states and 240392 transitions. Word has length 39 [2022-02-15 14:21:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:40,294 INFO L470 AbstractCegarLoop]: Abstraction has 57690 states and 240392 transitions. [2022-02-15 14:21:40,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 57690 states and 240392 transitions. [2022-02-15 14:21:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:40,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:40,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:40,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-15 14:21:40,693 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,SelfDestructingSolverStorable52 [2022-02-15 14:21:40,693 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -385556789, now seen corresponding path program 45 times [2022-02-15 14:21:40,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:40,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55169765] [2022-02-15 14:21:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:40,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:40,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55169765] [2022-02-15 14:21:40,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55169765] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073257700] [2022-02-15 14:21:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:21:40,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:40,856 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) [2022-02-15 14:21:40,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 14:21:40,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:21:40,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:21:40,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:41,089 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:21:41,089 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 45 treesize of output 21 [2022-02-15 14:21:41,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:41,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:21:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:41,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:41,497 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:41,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:21:41,671 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:41,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:21:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:41,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073257700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:41,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:41,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:21:41,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261399164] [2022-02-15 14:21:41,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:21:41,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:21:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:21:41,747 INFO L87 Difference]: Start difference. First operand 57690 states and 240392 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:42,736 INFO L93 Difference]: Finished difference Result 85443 states and 356471 transitions. [2022-02-15 14:21:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:21:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:43,313 INFO L225 Difference]: With dead ends: 85443 [2022-02-15 14:21:43,313 INFO L226 Difference]: Without dead ends: 85388 [2022-02-15 14:21:43,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:21:43,313 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 269 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:43,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 493 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-02-15 14:21:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85388 states. [2022-02-15 14:21:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85388 to 59136. [2022-02-15 14:21:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59136 states, 59135 states have (on average 4.169256785321721) internal successors, (246549), 59135 states have internal predecessors, (246549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59136 states to 59136 states and 246549 transitions. [2022-02-15 14:21:45,599 INFO L78 Accepts]: Start accepts. Automaton has 59136 states and 246549 transitions. Word has length 39 [2022-02-15 14:21:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:45,599 INFO L470 AbstractCegarLoop]: Abstraction has 59136 states and 246549 transitions. [2022-02-15 14:21:45,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 59136 states and 246549 transitions. [2022-02-15 14:21:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:45,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:45,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:45,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:46,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:46,163 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -441787771, now seen corresponding path program 46 times [2022-02-15 14:21:46,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:46,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110935268] [2022-02-15 14:21:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:46,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:46,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:46,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110935268] [2022-02-15 14:21:46,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110935268] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:46,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781387376] [2022-02-15 14:21:46,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:21:46,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:46,389 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) [2022-02-15 14:21:46,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 14:21:46,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:21:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:46,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:21:46,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:46,660 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:46,661 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 39 treesize of output 21 [2022-02-15 14:21:46,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:46,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:46,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:21:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:46,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:47,144 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:47,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:21:47,293 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:47,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:21:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:47,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781387376] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:47,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:47,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:21:47,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730555896] [2022-02-15 14:21:47,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:47,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:21:47,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:21:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:21:47,369 INFO L87 Difference]: Start difference. First operand 59136 states and 246549 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:48,372 INFO L93 Difference]: Finished difference Result 83836 states and 349646 transitions. [2022-02-15 14:21:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:21:48,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:48,724 INFO L225 Difference]: With dead ends: 83836 [2022-02-15 14:21:48,724 INFO L226 Difference]: Without dead ends: 83781 [2022-02-15 14:21:48,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:21:48,725 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 291 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:48,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 556 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 506 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-02-15 14:21:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83781 states. [2022-02-15 14:21:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83781 to 57260. [2022-02-15 14:21:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57260 states, 57259 states have (on average 4.1683403482421975) internal successors, (238675), 57259 states have internal predecessors, (238675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57260 states to 57260 states and 238675 transitions. [2022-02-15 14:21:50,913 INFO L78 Accepts]: Start accepts. Automaton has 57260 states and 238675 transitions. Word has length 39 [2022-02-15 14:21:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:50,913 INFO L470 AbstractCegarLoop]: Abstraction has 57260 states and 238675 transitions. [2022-02-15 14:21:50,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 57260 states and 238675 transitions. [2022-02-15 14:21:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:51,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:51,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:51,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:51,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:51,615 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -822556209, now seen corresponding path program 47 times [2022-02-15 14:21:51,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:51,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755396793] [2022-02-15 14:21:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:51,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:51,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:51,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755396793] [2022-02-15 14:21:51,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755396793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:51,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517282533] [2022-02-15 14:21:51,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:21:51,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:51,773 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) [2022-02-15 14:21:51,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 14:21:51,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:21:51,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:21:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:52,068 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:21:52,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:21:52,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:52,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:52,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:21:52,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:21:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:52,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:52,574 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:52,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 72 [2022-02-15 14:21:53,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:53,105 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:21:53,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 41 [2022-02-15 14:21:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:53,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517282533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:53,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:53,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-02-15 14:21:53,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236724527] [2022-02-15 14:21:53,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:53,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:21:53,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:21:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:21:53,148 INFO L87 Difference]: Start difference. First operand 57260 states and 238675 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:21:54,233 INFO L93 Difference]: Finished difference Result 80807 states and 336182 transitions. [2022-02-15 14:21:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 14:21:54,233 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:21:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:21:54,796 INFO L225 Difference]: With dead ends: 80807 [2022-02-15 14:21:54,796 INFO L226 Difference]: Without dead ends: 80804 [2022-02-15 14:21:54,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-02-15 14:21:54,796 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 380 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:21:54,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 841 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 492 Invalid, 0 Unknown, 376 Unchecked, 0.2s Time] [2022-02-15 14:21:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80804 states. [2022-02-15 14:21:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80804 to 57809. [2022-02-15 14:21:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57809 states, 57808 states have (on average 4.17341890395793) internal successors, (241257), 57808 states have internal predecessors, (241257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57809 states to 57809 states and 241257 transitions. [2022-02-15 14:21:56,836 INFO L78 Accepts]: Start accepts. Automaton has 57809 states and 241257 transitions. Word has length 39 [2022-02-15 14:21:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:21:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 57809 states and 241257 transitions. [2022-02-15 14:21:56,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:21:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 57809 states and 241257 transitions. [2022-02-15 14:21:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:21:57,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:21:57,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:21:57,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-15 14:21:57,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-15 14:21:57,512 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:21:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:21:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1095061371, now seen corresponding path program 48 times [2022-02-15 14:21:57,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:21:57,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111756667] [2022-02-15 14:21:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:21:57,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:21:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:21:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:57,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:21:57,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111756667] [2022-02-15 14:21:57,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111756667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:21:57,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018365786] [2022-02-15 14:21:57,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:21:57,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:21:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:21:57,714 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) [2022-02-15 14:21:57,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 14:21:57,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:21:57,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:21:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:21:57,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:21:57,949 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:21:57,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:21:58,037 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:21:58,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:21:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:58,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:21:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:21:59,110 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:21:59,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-02-15 14:21:59,263 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:21:59,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-02-15 14:21:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:21:59,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018365786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:21:59,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:21:59,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 14:21:59,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904405242] [2022-02-15 14:21:59,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:21:59,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:21:59,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:21:59,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:21:59,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:21:59,322 INFO L87 Difference]: Start difference. First operand 57809 states and 241257 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:00,885 INFO L93 Difference]: Finished difference Result 99004 states and 413752 transitions. [2022-02-15 14:22:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 14:22:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:01,400 INFO L225 Difference]: With dead ends: 99004 [2022-02-15 14:22:01,401 INFO L226 Difference]: Without dead ends: 98997 [2022-02-15 14:22:01,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:22:01,401 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 484 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:01,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 829 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 616 Invalid, 0 Unknown, 503 Unchecked, 0.5s Time] [2022-02-15 14:22:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98997 states. [2022-02-15 14:22:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98997 to 53377. [2022-02-15 14:22:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53377 states, 53376 states have (on average 4.171987410071942) internal successors, (222684), 53376 states have internal predecessors, (222684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53377 states to 53377 states and 222684 transitions. [2022-02-15 14:22:03,741 INFO L78 Accepts]: Start accepts. Automaton has 53377 states and 222684 transitions. Word has length 39 [2022-02-15 14:22:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:03,741 INFO L470 AbstractCegarLoop]: Abstraction has 53377 states and 222684 transitions. [2022-02-15 14:22:03,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 53377 states and 222684 transitions. [2022-02-15 14:22:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:03,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:03,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:03,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:04,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-15 14:22:04,103 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1732244979, now seen corresponding path program 49 times [2022-02-15 14:22:04,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:04,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503153930] [2022-02-15 14:22:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:04,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:04,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:04,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503153930] [2022-02-15 14:22:04,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503153930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:04,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26393679] [2022-02-15 14:22:04,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:22:04,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:04,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:04,297 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) [2022-02-15 14:22:04,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 14:22:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:04,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:22:04,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:04,614 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:22:04,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 31 [2022-02-15 14:22:04,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:04,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:04,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:22:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:05,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:05,253 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:05,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:22:05,440 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:05,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:22:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:05,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26393679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:05,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:05,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-15 14:22:05,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106465298] [2022-02-15 14:22:05,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:05,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:22:05,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:22:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:22:05,517 INFO L87 Difference]: Start difference. First operand 53377 states and 222684 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:06,747 INFO L93 Difference]: Finished difference Result 93731 states and 390231 transitions. [2022-02-15 14:22:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 14:22:06,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:07,179 INFO L225 Difference]: With dead ends: 93731 [2022-02-15 14:22:07,179 INFO L226 Difference]: Without dead ends: 93499 [2022-02-15 14:22:07,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:22:07,180 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 268 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:07,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 799 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 842 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-02-15 14:22:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93499 states. [2022-02-15 14:22:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93499 to 53489. [2022-02-15 14:22:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53489 states, 53488 states have (on average 4.170729883338319) internal successors, (223084), 53488 states have internal predecessors, (223084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53489 states to 53489 states and 223084 transitions. [2022-02-15 14:22:09,441 INFO L78 Accepts]: Start accepts. Automaton has 53489 states and 223084 transitions. Word has length 39 [2022-02-15 14:22:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:09,441 INFO L470 AbstractCegarLoop]: Abstraction has 53489 states and 223084 transitions. [2022-02-15 14:22:09,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 53489 states and 223084 transitions. [2022-02-15 14:22:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:09,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:09,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:09,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:10,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-15 14:22:10,119 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash 945195917, now seen corresponding path program 50 times [2022-02-15 14:22:10,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:10,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488002420] [2022-02-15 14:22:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:10,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:10,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:10,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488002420] [2022-02-15 14:22:10,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488002420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:10,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341838360] [2022-02-15 14:22:10,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:22:10,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:10,304 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) [2022-02-15 14:22:10,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 14:22:10,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:22:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:22:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:22:10,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:10,748 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:22:10,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 45 [2022-02-15 14:22:10,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:10,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:10,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:10,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:22:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:10,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:11,045 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:11,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:22:11,225 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:11,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:22:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:11,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341838360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:11,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:11,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:22:11,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991176605] [2022-02-15 14:22:11,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:11,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:22:11,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:11,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:22:11,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:22:11,291 INFO L87 Difference]: Start difference. First operand 53489 states and 223084 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:12,307 INFO L93 Difference]: Finished difference Result 83041 states and 345707 transitions. [2022-02-15 14:22:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:22:12,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:12,701 INFO L225 Difference]: With dead ends: 83041 [2022-02-15 14:22:12,702 INFO L226 Difference]: Without dead ends: 82837 [2022-02-15 14:22:12,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:22:12,702 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 218 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:12,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 778 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 736 Invalid, 0 Unknown, 206 Unchecked, 0.2s Time] [2022-02-15 14:22:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82837 states. [2022-02-15 14:22:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82837 to 53657. [2022-02-15 14:22:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53657 states, 53656 states have (on average 4.170791710153571) internal successors, (223788), 53656 states have internal predecessors, (223788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53657 states to 53657 states and 223788 transitions. [2022-02-15 14:22:14,829 INFO L78 Accepts]: Start accepts. Automaton has 53657 states and 223788 transitions. Word has length 39 [2022-02-15 14:22:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:14,829 INFO L470 AbstractCegarLoop]: Abstraction has 53657 states and 223788 transitions. [2022-02-15 14:22:14,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 53657 states and 223788 transitions. [2022-02-15 14:22:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:14,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:14,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:14,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:15,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-15 14:22:15,184 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -532720247, now seen corresponding path program 51 times [2022-02-15 14:22:15,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:15,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118860836] [2022-02-15 14:22:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:15,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:15,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:15,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118860836] [2022-02-15 14:22:15,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118860836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:15,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106095584] [2022-02-15 14:22:15,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:22:15,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:15,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:15,349 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) [2022-02-15 14:22:15,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 14:22:15,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 14:22:15,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:22:15,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-15 14:22:15,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:16,026 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:22:16,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 51 [2022-02-15 14:22:16,081 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:22:16,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-02-15 14:22:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:16,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:17,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:17,045 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:22:17,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-02-15 14:22:17,210 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:17,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-02-15 14:22:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:17,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106095584] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:17,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:17,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 14:22:17,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915135567] [2022-02-15 14:22:17,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:17,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:22:17,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:22:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:22:17,281 INFO L87 Difference]: Start difference. First operand 53657 states and 223788 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:19,124 INFO L93 Difference]: Finished difference Result 103103 states and 430059 transitions. [2022-02-15 14:22:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:22:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:19,598 INFO L225 Difference]: With dead ends: 103103 [2022-02-15 14:22:19,598 INFO L226 Difference]: Without dead ends: 103013 [2022-02-15 14:22:19,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:22:19,599 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 541 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1043 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:19,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1240 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 735 Invalid, 0 Unknown, 1043 Unchecked, 0.3s Time] [2022-02-15 14:22:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103013 states. [2022-02-15 14:22:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103013 to 54613. [2022-02-15 14:22:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54613 states, 54612 states have (on average 4.16919358382773) internal successors, (227688), 54612 states have internal predecessors, (227688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54613 states to 54613 states and 227688 transitions. [2022-02-15 14:22:21,962 INFO L78 Accepts]: Start accepts. Automaton has 54613 states and 227688 transitions. Word has length 39 [2022-02-15 14:22:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:21,962 INFO L470 AbstractCegarLoop]: Abstraction has 54613 states and 227688 transitions. [2022-02-15 14:22:21,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 54613 states and 227688 transitions. [2022-02-15 14:22:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:22,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:22,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:22,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:22,316 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,SelfDestructingSolverStorable59 [2022-02-15 14:22:22,316 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash -320951507, now seen corresponding path program 52 times [2022-02-15 14:22:22,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:22,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086594768] [2022-02-15 14:22:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:22,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:22,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:22,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086594768] [2022-02-15 14:22:22,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086594768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:22,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839592692] [2022-02-15 14:22:22,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:22:22,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:22,458 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) [2022-02-15 14:22:22,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 14:22:22,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:22:22,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:22:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:22:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:22,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:22,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2022-02-15 14:22:22,937 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:22:22,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-02-15 14:22:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:22,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:23,103 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:23,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:22:23,465 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:23,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:22:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:23,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839592692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:23,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:23,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:22:23,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710872706] [2022-02-15 14:22:23,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:23,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:22:23,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:22:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:22:23,506 INFO L87 Difference]: Start difference. First operand 54613 states and 227688 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:24,709 INFO L93 Difference]: Finished difference Result 84470 states and 350765 transitions. [2022-02-15 14:22:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 14:22:24,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:25,131 INFO L225 Difference]: With dead ends: 84470 [2022-02-15 14:22:25,131 INFO L226 Difference]: Without dead ends: 84380 [2022-02-15 14:22:25,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:22:25,132 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 218 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:25,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 779 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 901 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-02-15 14:22:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84380 states. [2022-02-15 14:22:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84380 to 53377. [2022-02-15 14:22:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53377 states, 53376 states have (on average 4.171987410071942) internal successors, (222684), 53376 states have internal predecessors, (222684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53377 states to 53377 states and 222684 transitions. [2022-02-15 14:22:27,379 INFO L78 Accepts]: Start accepts. Automaton has 53377 states and 222684 transitions. Word has length 39 [2022-02-15 14:22:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:27,379 INFO L470 AbstractCegarLoop]: Abstraction has 53377 states and 222684 transitions. [2022-02-15 14:22:27,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 53377 states and 222684 transitions. [2022-02-15 14:22:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:27,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:27,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:27,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:27,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:27,799 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:27,800 INFO L85 PathProgramCache]: Analyzing trace with hash 851605965, now seen corresponding path program 53 times [2022-02-15 14:22:27,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:27,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782852749] [2022-02-15 14:22:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:27,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:27,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:27,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782852749] [2022-02-15 14:22:27,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782852749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:27,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941143250] [2022-02-15 14:22:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:22:27,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:27,960 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) [2022-02-15 14:22:28,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-15 14:22:28,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:22:28,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:22:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-15 14:22:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:28,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:28,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:22:28,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2022-02-15 14:22:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:28,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:28,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:28,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2022-02-15 14:22:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:28,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:28,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:28,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:28,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:28,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:22:28,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2022-02-15 14:22:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:29,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:29,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:29,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:29,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-02-15 14:22:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:29,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941143250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:29,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:29,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-02-15 14:22:29,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237503835] [2022-02-15 14:22:29,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:29,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:22:29,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:22:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:22:29,258 INFO L87 Difference]: Start difference. First operand 53377 states and 222684 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:32,021 INFO L93 Difference]: Finished difference Result 111731 states and 456915 transitions. [2022-02-15 14:22:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:22:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:32,888 INFO L225 Difference]: With dead ends: 111731 [2022-02-15 14:22:32,888 INFO L226 Difference]: Without dead ends: 111302 [2022-02-15 14:22:32,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=634, Invalid=3148, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:22:32,889 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 871 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:32,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 1710 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1670 Invalid, 0 Unknown, 670 Unchecked, 1.1s Time] [2022-02-15 14:22:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111302 states. [2022-02-15 14:22:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111302 to 60406. [2022-02-15 14:22:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60406 states, 60405 states have (on average 4.185713103219932) internal successors, (252838), 60405 states have internal predecessors, (252838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60406 states to 60406 states and 252838 transitions. [2022-02-15 14:22:35,810 INFO L78 Accepts]: Start accepts. Automaton has 60406 states and 252838 transitions. Word has length 39 [2022-02-15 14:22:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:35,810 INFO L470 AbstractCegarLoop]: Abstraction has 60406 states and 252838 transitions. [2022-02-15 14:22:35,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 60406 states and 252838 transitions. [2022-02-15 14:22:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:35,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:35,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:35,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:36,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:36,183 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:36,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2086619959, now seen corresponding path program 54 times [2022-02-15 14:22:36,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:36,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610808716] [2022-02-15 14:22:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:36,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:36,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:36,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610808716] [2022-02-15 14:22:36,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610808716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:36,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825197862] [2022-02-15 14:22:36,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:22:36,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:36,331 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) [2022-02-15 14:22:36,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-15 14:22:36,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:22:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:22:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:22:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:36,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:36,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-02-15 14:22:37,017 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:22:37,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:22:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:37,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:37,279 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:37,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-02-15 14:22:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:37,773 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-02-15 14:22:37,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 49 [2022-02-15 14:22:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:37,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825197862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:37,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:37,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-15 14:22:37,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766236158] [2022-02-15 14:22:37,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:22:37,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:22:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:22:37,852 INFO L87 Difference]: Start difference. First operand 60406 states and 252838 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:39,249 INFO L93 Difference]: Finished difference Result 80253 states and 332973 transitions. [2022-02-15 14:22:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:22:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:39,698 INFO L225 Difference]: With dead ends: 80253 [2022-02-15 14:22:39,698 INFO L226 Difference]: Without dead ends: 80231 [2022-02-15 14:22:39,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:22:39,698 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 332 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 686 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:39,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 1225 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 479 Invalid, 0 Unknown, 686 Unchecked, 0.2s Time] [2022-02-15 14:22:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80231 states. [2022-02-15 14:22:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80231 to 64804. [2022-02-15 14:22:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 4.201873370060028) internal successors, (272294), 64803 states have internal predecessors, (272294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 272294 transitions. [2022-02-15 14:22:42,441 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 272294 transitions. Word has length 39 [2022-02-15 14:22:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:42,441 INFO L470 AbstractCegarLoop]: Abstraction has 64804 states and 272294 transitions. [2022-02-15 14:22:42,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 272294 transitions. [2022-02-15 14:22:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:42,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:42,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:42,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:42,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:42,840 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash 520101065, now seen corresponding path program 55 times [2022-02-15 14:22:42,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:42,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049719170] [2022-02-15 14:22:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:42,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:43,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:43,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049719170] [2022-02-15 14:22:43,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049719170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:43,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391193255] [2022-02-15 14:22:43,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:22:43,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:43,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:43,047 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) [2022-02-15 14:22:43,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-15 14:22:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:22:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:43,500 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:22:43,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-02-15 14:22:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:43,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:43,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:22:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:43,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:43,789 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:43,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:22:43,930 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:43,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:22:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:43,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391193255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:43,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:43,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:22:43,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63371177] [2022-02-15 14:22:43,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:43,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:22:43,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:22:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:22:43,983 INFO L87 Difference]: Start difference. First operand 64804 states and 272294 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:45,405 INFO L93 Difference]: Finished difference Result 100140 states and 420081 transitions. [2022-02-15 14:22:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:22:45,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:45,913 INFO L225 Difference]: With dead ends: 100140 [2022-02-15 14:22:45,914 INFO L226 Difference]: Without dead ends: 100085 [2022-02-15 14:22:45,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:22:45,914 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 203 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:45,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 772 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 681 Invalid, 0 Unknown, 268 Unchecked, 0.2s Time] [2022-02-15 14:22:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100085 states. [2022-02-15 14:22:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100085 to 63754. [2022-02-15 14:22:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63754 states, 63753 states have (on average 4.206107947861277) internal successors, (268152), 63753 states have internal predecessors, (268152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63754 states to 63754 states and 268152 transitions. [2022-02-15 14:22:48,523 INFO L78 Accepts]: Start accepts. Automaton has 63754 states and 268152 transitions. Word has length 39 [2022-02-15 14:22:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:48,523 INFO L470 AbstractCegarLoop]: Abstraction has 63754 states and 268152 transitions. [2022-02-15 14:22:48,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 63754 states and 268152 transitions. [2022-02-15 14:22:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:48,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:48,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:48,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:48,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:48,907 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -597267835, now seen corresponding path program 56 times [2022-02-15 14:22:48,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:48,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686605390] [2022-02-15 14:22:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:48,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:49,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:49,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686605390] [2022-02-15 14:22:49,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686605390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:49,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615610445] [2022-02-15 14:22:49,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:22:49,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:49,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:49,068 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) [2022-02-15 14:22:49,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-15 14:22:49,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:22:49,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:22:49,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:22:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:49,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:49,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:22:49,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 47 [2022-02-15 14:22:49,723 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:22:49,723 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-02-15 14:22:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:49,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:49,948 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:49,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:22:50,128 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:50,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:22:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:50,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615610445] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:50,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:50,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:22:50,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695169001] [2022-02-15 14:22:50,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:50,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:22:50,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:22:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:22:50,205 INFO L87 Difference]: Start difference. First operand 63754 states and 268152 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:51,353 INFO L93 Difference]: Finished difference Result 95660 states and 401542 transitions. [2022-02-15 14:22:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:22:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:22:51,836 INFO L225 Difference]: With dead ends: 95660 [2022-02-15 14:22:51,836 INFO L226 Difference]: Without dead ends: 95605 [2022-02-15 14:22:51,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:22:51,837 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 219 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:22:51,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 769 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 634 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2022-02-15 14:22:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95605 states. [2022-02-15 14:22:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95605 to 64286. [2022-02-15 14:22:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64286 states, 64285 states have (on average 4.207684529828109) internal successors, (270491), 64285 states have internal predecessors, (270491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64286 states to 64286 states and 270491 transitions. [2022-02-15 14:22:54,475 INFO L78 Accepts]: Start accepts. Automaton has 64286 states and 270491 transitions. Word has length 39 [2022-02-15 14:22:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:22:54,475 INFO L470 AbstractCegarLoop]: Abstraction has 64286 states and 270491 transitions. [2022-02-15 14:22:54,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 64286 states and 270491 transitions. [2022-02-15 14:22:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:22:54,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:22:54,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:22:54,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-15 14:22:54,884 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,SelfDestructingSolverStorable64 [2022-02-15 14:22:54,884 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:22:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:22:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1638516667, now seen corresponding path program 57 times [2022-02-15 14:22:54,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:22:54,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238983297] [2022-02-15 14:22:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:22:54,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:22:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:22:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:55,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:22:55,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238983297] [2022-02-15 14:22:55,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238983297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:22:55,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645844039] [2022-02-15 14:22:55,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:22:55,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:22:55,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:22:55,068 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) [2022-02-15 14:22:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-15 14:22:55,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:22:55,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:22:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-15 14:22:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:22:55,535 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:22:55,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 51 [2022-02-15 14:22:55,598 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:22:55,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-02-15 14:22:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:55,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:22:57,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:22:57,071 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:22:57,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-02-15 14:22:57,248 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:22:57,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-02-15 14:22:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:22:57,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645844039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:22:57,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:22:57,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 14:22:57,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736796634] [2022-02-15 14:22:57,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:22:57,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:22:57,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:22:57,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:22:57,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:22:57,317 INFO L87 Difference]: Start difference. First operand 64286 states and 270491 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:22:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:22:59,603 INFO L93 Difference]: Finished difference Result 138317 states and 580141 transitions. [2022-02-15 14:22:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:22:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:22:59,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:00,274 INFO L225 Difference]: With dead ends: 138317 [2022-02-15 14:23:00,274 INFO L226 Difference]: Without dead ends: 138255 [2022-02-15 14:23:00,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:23:00,274 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 576 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 686 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:00,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1248 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1102 Invalid, 0 Unknown, 686 Unchecked, 0.4s Time] [2022-02-15 14:23:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138255 states. [2022-02-15 14:23:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138255 to 64280. [2022-02-15 14:23:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 4.20775058728356) internal successors, (270470), 64279 states have internal predecessors, (270470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 270470 transitions. [2022-02-15 14:23:03,760 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 270470 transitions. Word has length 39 [2022-02-15 14:23:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:03,761 INFO L470 AbstractCegarLoop]: Abstraction has 64280 states and 270470 transitions. [2022-02-15 14:23:03,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 270470 transitions. [2022-02-15 14:23:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:04,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:04,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:04,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-15 14:23:04,480 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,SelfDestructingSolverStorable65 [2022-02-15 14:23:04,481 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1012065451, now seen corresponding path program 58 times [2022-02-15 14:23:04,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:04,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535258198] [2022-02-15 14:23:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:04,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:04,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:04,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535258198] [2022-02-15 14:23:04,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535258198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:04,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928041550] [2022-02-15 14:23:04,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:23:04,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:04,638 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) [2022-02-15 14:23:04,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-15 14:23:04,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:23:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:23:04,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:23:04,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:05,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:05,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:05,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 47 [2022-02-15 14:23:05,177 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:23:05,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-02-15 14:23:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:05,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:05,403 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:05,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:23:05,612 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:05,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:23:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:05,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928041550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:05,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:05,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:23:05,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393214774] [2022-02-15 14:23:05,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:05,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:23:05,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:23:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:23:05,677 INFO L87 Difference]: Start difference. First operand 64280 states and 270470 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:06,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:06,983 INFO L93 Difference]: Finished difference Result 97472 states and 410047 transitions. [2022-02-15 14:23:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:23:06,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:07,686 INFO L225 Difference]: With dead ends: 97472 [2022-02-15 14:23:07,687 INFO L226 Difference]: Without dead ends: 97465 [2022-02-15 14:23:07,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:23:07,687 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 210 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:07,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 768 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 843 Invalid, 0 Unknown, 215 Unchecked, 0.3s Time] [2022-02-15 14:23:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97465 states. [2022-02-15 14:23:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97465 to 64014. [2022-02-15 14:23:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64014 states, 64013 states have (on average 4.20677049974224) internal successors, (269288), 64013 states have internal predecessors, (269288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64014 states to 64014 states and 269288 transitions. [2022-02-15 14:23:10,071 INFO L78 Accepts]: Start accepts. Automaton has 64014 states and 269288 transitions. Word has length 39 [2022-02-15 14:23:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:10,071 INFO L470 AbstractCegarLoop]: Abstraction has 64014 states and 269288 transitions. [2022-02-15 14:23:10,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 64014 states and 269288 transitions. [2022-02-15 14:23:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:10,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:10,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:10,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-15 14:23:10,450 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,SelfDestructingSolverStorable66 [2022-02-15 14:23:10,450 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash -277661645, now seen corresponding path program 59 times [2022-02-15 14:23:10,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:10,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524934787] [2022-02-15 14:23:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:10,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:10,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:10,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524934787] [2022-02-15 14:23:10,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524934787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:10,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100619935] [2022-02-15 14:23:10,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:23:10,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:10,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:10,642 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) [2022-02-15 14:23:10,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-15 14:23:10,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:23:10,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:23:10,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:23:10,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:10,930 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:23:10,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2022-02-15 14:23:11,078 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:23:11,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-02-15 14:23:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:11,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:12,885 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:23:12,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 53 [2022-02-15 14:23:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:13,289 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:23:13,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-15 14:23:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:13,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100619935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:13,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:13,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-02-15 14:23:13,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747922487] [2022-02-15 14:23:13,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:13,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:23:13,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:13,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:23:13,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:23:13,316 INFO L87 Difference]: Start difference. First operand 64014 states and 269288 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:14,296 INFO L93 Difference]: Finished difference Result 81112 states and 338143 transitions. [2022-02-15 14:23:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:23:14,296 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:14,796 INFO L225 Difference]: With dead ends: 81112 [2022-02-15 14:23:14,796 INFO L226 Difference]: Without dead ends: 80792 [2022-02-15 14:23:14,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 14:23:14,797 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 347 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:14,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 1285 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 338 Invalid, 0 Unknown, 441 Unchecked, 0.1s Time] [2022-02-15 14:23:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80792 states. [2022-02-15 14:23:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80792 to 65453. [2022-02-15 14:23:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65453 states, 65452 states have (on average 4.196540976593534) internal successors, (274672), 65452 states have internal predecessors, (274672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65453 states to 65453 states and 274672 transitions. [2022-02-15 14:23:17,141 INFO L78 Accepts]: Start accepts. Automaton has 65453 states and 274672 transitions. Word has length 39 [2022-02-15 14:23:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:17,141 INFO L470 AbstractCegarLoop]: Abstraction has 65453 states and 274672 transitions. [2022-02-15 14:23:17,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 65453 states and 274672 transitions. [2022-02-15 14:23:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:17,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:17,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:17,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-15 14:23:17,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:17,586 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash 242274295, now seen corresponding path program 60 times [2022-02-15 14:23:17,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:17,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462546978] [2022-02-15 14:23:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:17,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:17,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:17,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462546978] [2022-02-15 14:23:17,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462546978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:17,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749936382] [2022-02-15 14:23:17,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:23:17,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:17,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:17,818 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) [2022-02-15 14:23:17,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-15 14:23:17,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 14:23:17,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:23:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:23:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:18,210 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:23:18,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2022-02-15 14:23:18,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:18,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:23:18,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2022-02-15 14:23:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:19,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:20,529 INFO L353 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-02-15 14:23:20,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 45 [2022-02-15 14:23:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:21,144 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:23:21,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-15 14:23:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:21,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749936382] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:21,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:21,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-02-15 14:23:21,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795234045] [2022-02-15 14:23:21,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:21,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:23:21,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:23:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:23:21,184 INFO L87 Difference]: Start difference. First operand 65453 states and 274672 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:24,302 INFO L93 Difference]: Finished difference Result 155510 states and 648621 transitions. [2022-02-15 14:23:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:23:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:25,520 INFO L225 Difference]: With dead ends: 155510 [2022-02-15 14:23:25,520 INFO L226 Difference]: Without dead ends: 155420 [2022-02-15 14:23:25,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 64 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=544, Invalid=2648, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 14:23:25,535 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 599 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1348 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:25,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 1611 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 735 Invalid, 0 Unknown, 1348 Unchecked, 0.4s Time] [2022-02-15 14:23:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155420 states. [2022-02-15 14:23:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155420 to 66053. [2022-02-15 14:23:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66053 states, 66052 states have (on average 4.19469508871798) internal successors, (277068), 66052 states have internal predecessors, (277068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66053 states to 66053 states and 277068 transitions. [2022-02-15 14:23:29,090 INFO L78 Accepts]: Start accepts. Automaton has 66053 states and 277068 transitions. Word has length 39 [2022-02-15 14:23:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:29,090 INFO L470 AbstractCegarLoop]: Abstraction has 66053 states and 277068 transitions. [2022-02-15 14:23:29,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 66053 states and 277068 transitions. [2022-02-15 14:23:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:29,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:29,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:29,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-15 14:23:29,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:29,835 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1404980109, now seen corresponding path program 61 times [2022-02-15 14:23:29,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:29,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099138717] [2022-02-15 14:23:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:29,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:30,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:30,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099138717] [2022-02-15 14:23:30,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099138717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:30,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231756596] [2022-02-15 14:23:30,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:23:30,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:30,071 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) [2022-02-15 14:23:30,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-15 14:23:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:23:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:30,431 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:23:30,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 31 [2022-02-15 14:23:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:30,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:30,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:23:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:30,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:30,772 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:30,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:23:30,896 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:30,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:23:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:31,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231756596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:31,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:31,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-15 14:23:31,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014463942] [2022-02-15 14:23:31,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:31,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:23:31,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:31,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:23:31,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:23:31,001 INFO L87 Difference]: Start difference. First operand 66053 states and 277068 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:32,589 INFO L93 Difference]: Finished difference Result 104374 states and 435873 transitions. [2022-02-15 14:23:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 14:23:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:33,227 INFO L225 Difference]: With dead ends: 104374 [2022-02-15 14:23:33,227 INFO L226 Difference]: Without dead ends: 104086 [2022-02-15 14:23:33,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:23:33,232 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 241 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:33,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 843 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 942 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2022-02-15 14:23:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104086 states. [2022-02-15 14:23:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104086 to 64250. [2022-02-15 14:23:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64250 states, 64249 states have (on average 4.204423415150431) internal successors, (270130), 64249 states have internal predecessors, (270130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64250 states to 64250 states and 270130 transitions. [2022-02-15 14:23:35,959 INFO L78 Accepts]: Start accepts. Automaton has 64250 states and 270130 transitions. Word has length 39 [2022-02-15 14:23:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:35,959 INFO L470 AbstractCegarLoop]: Abstraction has 64250 states and 270130 transitions. [2022-02-15 14:23:35,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 64250 states and 270130 transitions. [2022-02-15 14:23:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:36,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:36,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:36,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-15 14:23:36,673 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,SelfDestructingSolverStorable69 [2022-02-15 14:23:36,673 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1064710707, now seen corresponding path program 62 times [2022-02-15 14:23:36,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:36,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273613733] [2022-02-15 14:23:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:36,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:36,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:36,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273613733] [2022-02-15 14:23:36,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273613733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:36,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853775054] [2022-02-15 14:23:36,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:23:36,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:36,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:36,848 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) [2022-02-15 14:23:36,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-15 14:23:36,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:23:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:23:36,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:23:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:37,260 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:23:37,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 45 [2022-02-15 14:23:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:37,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:37,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 18 [2022-02-15 14:23:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:37,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:37,542 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:37,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:23:37,691 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:37,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:23:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:37,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853775054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:37,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:37,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:23:37,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050937418] [2022-02-15 14:23:37,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:37,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:23:37,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:23:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:23:37,747 INFO L87 Difference]: Start difference. First operand 64250 states and 270130 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:38,950 INFO L93 Difference]: Finished difference Result 98473 states and 412117 transitions. [2022-02-15 14:23:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 14:23:38,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:39,680 INFO L225 Difference]: With dead ends: 98473 [2022-02-15 14:23:39,680 INFO L226 Difference]: Without dead ends: 98243 [2022-02-15 14:23:39,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:23:39,680 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 252 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:39,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 802 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 710 Invalid, 0 Unknown, 307 Unchecked, 0.3s Time] [2022-02-15 14:23:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98243 states. [2022-02-15 14:23:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98243 to 64516. [2022-02-15 14:23:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64516 states, 64515 states have (on average 4.2048980857165) internal successors, (271279), 64515 states have internal predecessors, (271279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64516 states to 64516 states and 271279 transitions. [2022-02-15 14:23:42,449 INFO L78 Accepts]: Start accepts. Automaton has 64516 states and 271279 transitions. Word has length 39 [2022-02-15 14:23:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:42,449 INFO L470 AbstractCegarLoop]: Abstraction has 64516 states and 271279 transitions. [2022-02-15 14:23:42,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 64516 states and 271279 transitions. [2022-02-15 14:23:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:42,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:42,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:42,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-15 14:23:42,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:42,853 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:42,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1752340425, now seen corresponding path program 63 times [2022-02-15 14:23:42,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:42,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872260575] [2022-02-15 14:23:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:42,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:43,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:43,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872260575] [2022-02-15 14:23:43,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872260575] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:43,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860840003] [2022-02-15 14:23:43,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:23:43,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:43,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:43,040 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) [2022-02-15 14:23:43,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-15 14:23:43,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 14:23:43,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:23:43,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-15 14:23:43,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:43,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:23:43,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 65 [2022-02-15 14:23:43,806 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:23:43,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2022-02-15 14:23:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:43,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:44,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:44,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:44,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:23:44,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-02-15 14:23:44,329 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:44,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 74 [2022-02-15 14:23:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:44,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860840003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:44,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:44,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 14:23:44,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821858981] [2022-02-15 14:23:44,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:44,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:23:44,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:23:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:23:44,418 INFO L87 Difference]: Start difference. First operand 64516 states and 271279 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:45,524 INFO L93 Difference]: Finished difference Result 95807 states and 400697 transitions. [2022-02-15 14:23:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 14:23:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:46,248 INFO L225 Difference]: With dead ends: 95807 [2022-02-15 14:23:46,248 INFO L226 Difference]: Without dead ends: 95717 [2022-02-15 14:23:46,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:23:46,249 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 371 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 834 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:46,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1154 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 834 Unchecked, 0.2s Time] [2022-02-15 14:23:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95717 states. [2022-02-15 14:23:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95717 to 65089. [2022-02-15 14:23:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65089 states, 65088 states have (on average 4.203463003933137) internal successors, (273595), 65088 states have internal predecessors, (273595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65089 states to 65089 states and 273595 transitions. [2022-02-15 14:23:49,174 INFO L78 Accepts]: Start accepts. Automaton has 65089 states and 273595 transitions. Word has length 39 [2022-02-15 14:23:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:49,174 INFO L470 AbstractCegarLoop]: Abstraction has 65089 states and 273595 transitions. [2022-02-15 14:23:49,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 65089 states and 273595 transitions. [2022-02-15 14:23:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:49,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:49,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:49,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-15 14:23:49,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:49,612 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1964109165, now seen corresponding path program 64 times [2022-02-15 14:23:49,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:49,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932001139] [2022-02-15 14:23:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:49,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:49,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:49,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932001139] [2022-02-15 14:23:49,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932001139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:49,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998961269] [2022-02-15 14:23:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:23:49,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:49,896 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) [2022-02-15 14:23:49,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-15 14:23:49,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:23:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:23:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:23:49,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:50,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:50,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2022-02-15 14:23:50,417 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:23:50,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-02-15 14:23:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:50,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:50,644 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:50,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:23:50,820 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:23:50,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:23:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:50,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998961269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:50,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:50,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 14:23:50,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654834482] [2022-02-15 14:23:50,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:50,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:23:50,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:23:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:23:50,899 INFO L87 Difference]: Start difference. First operand 65089 states and 273595 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:52,475 INFO L93 Difference]: Finished difference Result 99143 states and 414605 transitions. [2022-02-15 14:23:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 14:23:52,475 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:52,923 INFO L225 Difference]: With dead ends: 99143 [2022-02-15 14:23:52,923 INFO L226 Difference]: Without dead ends: 99113 [2022-02-15 14:23:52,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-02-15 14:23:52,930 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 294 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:52,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 791 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 886 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-02-15 14:23:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99113 states. [2022-02-15 14:23:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99113 to 65353. [2022-02-15 14:23:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65353 states, 65352 states have (on average 4.204813930713674) internal successors, (274793), 65352 states have internal predecessors, (274793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65353 states to 65353 states and 274793 transitions. [2022-02-15 14:23:55,685 INFO L78 Accepts]: Start accepts. Automaton has 65353 states and 274793 transitions. Word has length 39 [2022-02-15 14:23:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:23:55,687 INFO L470 AbstractCegarLoop]: Abstraction has 65353 states and 274793 transitions. [2022-02-15 14:23:55,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 65353 states and 274793 transitions. [2022-02-15 14:23:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:23:55,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:23:55,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:23:55,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-15 14:23:56,115 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,SelfDestructingSolverStorable72 [2022-02-15 14:23:56,115 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:23:56,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:23:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash 918841893, now seen corresponding path program 65 times [2022-02-15 14:23:56,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:23:56,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455966067] [2022-02-15 14:23:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:23:56,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:23:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:23:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:56,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:23:56,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455966067] [2022-02-15 14:23:56,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455966067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:23:56,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660799724] [2022-02-15 14:23:56,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:23:56,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:23:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:23:56,272 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) [2022-02-15 14:23:56,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-15 14:23:56,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:23:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:23:56,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 14:23:56,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:23:56,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:56,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:56,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-02-15 14:23:56,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:56,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:23:56,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:23:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:56,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:23:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:57,464 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-02-15 14:23:57,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 64 [2022-02-15 14:23:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:23:57,780 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-02-15 14:23:57,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 49 [2022-02-15 14:23:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:23:57,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660799724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:23:57,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:23:57,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-15 14:23:57,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533512225] [2022-02-15 14:23:57,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:23:57,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:23:57,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:23:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:23:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:23:57,872 INFO L87 Difference]: Start difference. First operand 65353 states and 274793 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:23:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:23:59,097 INFO L93 Difference]: Finished difference Result 89839 states and 372023 transitions. [2022-02-15 14:23:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:23:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:23:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:23:59,531 INFO L225 Difference]: With dead ends: 89839 [2022-02-15 14:23:59,531 INFO L226 Difference]: Without dead ends: 89751 [2022-02-15 14:23:59,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 14:23:59,532 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 339 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:23:59,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 976 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 569 Unchecked, 0.1s Time] [2022-02-15 14:23:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89751 states. [2022-02-15 14:24:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89751 to 66346. [2022-02-15 14:24:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66346 states, 66345 states have (on average 4.199804054563268) internal successors, (278636), 66345 states have internal predecessors, (278636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66346 states to 66346 states and 278636 transitions. [2022-02-15 14:24:02,335 INFO L78 Accepts]: Start accepts. Automaton has 66346 states and 278636 transitions. Word has length 39 [2022-02-15 14:24:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:02,335 INFO L470 AbstractCegarLoop]: Abstraction has 66346 states and 278636 transitions. [2022-02-15 14:24:02,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 66346 states and 278636 transitions. [2022-02-15 14:24:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:02,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:02,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:02,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:02,803 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1883093389, now seen corresponding path program 66 times [2022-02-15 14:24:02,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:02,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888167099] [2022-02-15 14:24:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:02,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:03,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:03,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888167099] [2022-02-15 14:24:03,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888167099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:03,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073656834] [2022-02-15 14:24:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:24:03,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:03,004 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) [2022-02-15 14:24:03,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-15 14:24:03,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 14:24:03,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:24:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 14:24:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:03,455 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:24:03,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 39 [2022-02-15 14:24:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:03,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-02-15 14:24:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:03,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:04,013 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:04,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-02-15 14:24:04,195 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:04,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:24:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:04,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073656834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:04,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:04,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:24:04,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319839861] [2022-02-15 14:24:04,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:04,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:24:04,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:24:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:24:04,260 INFO L87 Difference]: Start difference. First operand 66346 states and 278636 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:05,379 INFO L93 Difference]: Finished difference Result 97863 states and 409606 transitions. [2022-02-15 14:24:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:24:05,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:05,885 INFO L225 Difference]: With dead ends: 97863 [2022-02-15 14:24:05,885 INFO L226 Difference]: Without dead ends: 97703 [2022-02-15 14:24:05,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:24:05,887 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 209 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:05,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 751 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 586 Invalid, 0 Unknown, 426 Unchecked, 0.3s Time] [2022-02-15 14:24:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97703 states. [2022-02-15 14:24:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97703 to 66339. [2022-02-15 14:24:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66339 states, 66338 states have (on average 4.1999005095118935) internal successors, (278613), 66338 states have internal predecessors, (278613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66339 states to 66339 states and 278613 transitions. [2022-02-15 14:24:08,801 INFO L78 Accepts]: Start accepts. Automaton has 66339 states and 278613 transitions. Word has length 39 [2022-02-15 14:24:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:08,801 INFO L470 AbstractCegarLoop]: Abstraction has 66339 states and 278613 transitions. [2022-02-15 14:24:08,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 66339 states and 278613 transitions. [2022-02-15 14:24:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:08,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:08,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:09,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:09,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-15 14:24:09,210 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 116528589, now seen corresponding path program 67 times [2022-02-15 14:24:09,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:09,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378200904] [2022-02-15 14:24:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:09,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:09,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:09,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378200904] [2022-02-15 14:24:09,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378200904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:09,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617464465] [2022-02-15 14:24:09,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:24:09,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:09,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:09,380 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) [2022-02-15 14:24:09,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-15 14:24:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:09,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:24:09,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:09,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:09,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:09,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2022-02-15 14:24:09,788 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:24:09,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-02-15 14:24:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:09,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:10,022 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:10,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:24:10,173 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:10,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:24:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:10,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617464465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:10,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:10,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 14:24:10,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721283758] [2022-02-15 14:24:10,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:10,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:24:10,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:24:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:24:10,219 INFO L87 Difference]: Start difference. First operand 66339 states and 278613 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:11,756 INFO L93 Difference]: Finished difference Result 85694 states and 358259 transitions. [2022-02-15 14:24:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:24:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:12,193 INFO L225 Difference]: With dead ends: 85694 [2022-02-15 14:24:12,194 INFO L226 Difference]: Without dead ends: 85604 [2022-02-15 14:24:12,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:24:12,194 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 247 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:12,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 671 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 768 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-02-15 14:24:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85604 states. [2022-02-15 14:24:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85604 to 66523. [2022-02-15 14:24:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66523 states, 66522 states have (on average 4.198746279426355) internal successors, (279309), 66522 states have internal predecessors, (279309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66523 states to 66523 states and 279309 transitions. [2022-02-15 14:24:14,631 INFO L78 Accepts]: Start accepts. Automaton has 66523 states and 279309 transitions. Word has length 39 [2022-02-15 14:24:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:14,631 INFO L470 AbstractCegarLoop]: Abstraction has 66523 states and 279309 transitions. [2022-02-15 14:24:14,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 66523 states and 279309 transitions. [2022-02-15 14:24:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:14,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:14,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:14,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:14,999 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,SelfDestructingSolverStorable75 [2022-02-15 14:24:14,999 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1778485043, now seen corresponding path program 68 times [2022-02-15 14:24:15,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:15,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584161499] [2022-02-15 14:24:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:15,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:15,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:15,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584161499] [2022-02-15 14:24:15,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584161499] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:15,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739357666] [2022-02-15 14:24:15,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:24:15,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:15,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:15,129 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) [2022-02-15 14:24:15,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-15 14:24:15,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:24:15,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:24:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:24:15,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:15,754 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:24:15,754 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 47 treesize of output 29 [2022-02-15 14:24:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:15,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:15,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:24:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:15,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:16,030 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:16,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:24:16,206 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:16,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:24:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:16,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739357666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:16,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:16,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 14:24:16,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424527421] [2022-02-15 14:24:16,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:16,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:24:16,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:24:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:24:16,282 INFO L87 Difference]: Start difference. First operand 66523 states and 279309 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:17,239 INFO L93 Difference]: Finished difference Result 85839 states and 360917 transitions. [2022-02-15 14:24:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:24:17,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:17,660 INFO L225 Difference]: With dead ends: 85839 [2022-02-15 14:24:17,660 INFO L226 Difference]: Without dead ends: 85784 [2022-02-15 14:24:17,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:24:17,660 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 174 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:17,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 482 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 347 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-02-15 14:24:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85784 states. [2022-02-15 14:24:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85784 to 67600. [2022-02-15 14:24:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67600 states, 67599 states have (on average 4.199396440775751) internal successors, (283875), 67599 states have internal predecessors, (283875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67600 states to 67600 states and 283875 transitions. [2022-02-15 14:24:20,346 INFO L78 Accepts]: Start accepts. Automaton has 67600 states and 283875 transitions. Word has length 39 [2022-02-15 14:24:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:20,346 INFO L470 AbstractCegarLoop]: Abstraction has 67600 states and 283875 transitions. [2022-02-15 14:24:20,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 67600 states and 283875 transitions. [2022-02-15 14:24:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:20,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:20,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:20,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:21,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:21,023 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1083161669, now seen corresponding path program 69 times [2022-02-15 14:24:21,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:21,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077627184] [2022-02-15 14:24:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:21,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:21,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:21,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077627184] [2022-02-15 14:24:21,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077627184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:21,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119154611] [2022-02-15 14:24:21,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:24:21,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:21,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:21,207 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) [2022-02-15 14:24:21,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-15 14:24:21,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:24:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:24:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:24:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:21,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:24:21,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 14:24:21,811 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:24:21,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 40 [2022-02-15 14:24:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:21,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:23,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:23,806 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:24:23,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 53 [2022-02-15 14:24:24,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:24,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:24,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:24:24,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 42 [2022-02-15 14:24:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:24,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119154611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:24,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:24,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-02-15 14:24:24,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730310081] [2022-02-15 14:24:24,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:24,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:24:24,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:24:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:24:24,230 INFO L87 Difference]: Start difference. First operand 67600 states and 283875 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:26,027 INFO L93 Difference]: Finished difference Result 80420 states and 335614 transitions. [2022-02-15 14:24:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:24:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:26,411 INFO L225 Difference]: With dead ends: 80420 [2022-02-15 14:24:26,412 INFO L226 Difference]: Without dead ends: 80413 [2022-02-15 14:24:26,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 14:24:26,412 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 469 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:26,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1394 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 535 Invalid, 0 Unknown, 472 Unchecked, 0.2s Time] [2022-02-15 14:24:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80413 states. [2022-02-15 14:24:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80413 to 68397. [2022-02-15 14:24:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68397 states, 68396 states have (on average 4.197189894145857) internal successors, (287071), 68396 states have internal predecessors, (287071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68397 states to 68397 states and 287071 transitions. [2022-02-15 14:24:29,138 INFO L78 Accepts]: Start accepts. Automaton has 68397 states and 287071 transitions. Word has length 39 [2022-02-15 14:24:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:29,138 INFO L470 AbstractCegarLoop]: Abstraction has 68397 states and 287071 transitions. [2022-02-15 14:24:29,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 68397 states and 287071 transitions. [2022-02-15 14:24:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:29,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:29,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:29,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:29,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:29,567 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash -421743671, now seen corresponding path program 70 times [2022-02-15 14:24:29,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:29,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063232383] [2022-02-15 14:24:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:29,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:29,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:29,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063232383] [2022-02-15 14:24:29,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063232383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:29,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112934084] [2022-02-15 14:24:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:24:29,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:29,690 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) [2022-02-15 14:24:29,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-15 14:24:29,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:24:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:24:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:24:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:30,065 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:24:30,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-02-15 14:24:30,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:30,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:24:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:30,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:30,529 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:30,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:24:30,716 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:30,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:24:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:30,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112934084] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:30,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:30,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 14:24:30,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121817124] [2022-02-15 14:24:30,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:30,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:24:30,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:24:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:24:30,793 INFO L87 Difference]: Start difference. First operand 68397 states and 287071 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:31,825 INFO L93 Difference]: Finished difference Result 96032 states and 402939 transitions. [2022-02-15 14:24:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 14:24:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:32,535 INFO L225 Difference]: With dead ends: 96032 [2022-02-15 14:24:32,535 INFO L226 Difference]: Without dead ends: 95977 [2022-02-15 14:24:32,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:24:32,536 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 176 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:32,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 596 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 471 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-02-15 14:24:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95977 states. [2022-02-15 14:24:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95977 to 68665. [2022-02-15 14:24:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68665 states, 68664 states have (on average 4.197993125946638) internal successors, (288251), 68664 states have internal predecessors, (288251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68665 states to 68665 states and 288251 transitions. [2022-02-15 14:24:35,594 INFO L78 Accepts]: Start accepts. Automaton has 68665 states and 288251 transitions. Word has length 39 [2022-02-15 14:24:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:35,594 INFO L470 AbstractCegarLoop]: Abstraction has 68665 states and 288251 transitions. [2022-02-15 14:24:35,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 68665 states and 288251 transitions. [2022-02-15 14:24:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:35,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:35,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:35,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:36,030 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,SelfDestructingSolverStorable78 [2022-02-15 14:24:36,030 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:36,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1855064255, now seen corresponding path program 71 times [2022-02-15 14:24:36,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:36,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453902290] [2022-02-15 14:24:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:36,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:36,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:36,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453902290] [2022-02-15 14:24:36,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453902290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:36,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031611939] [2022-02-15 14:24:36,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:24:36,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:36,194 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) [2022-02-15 14:24:36,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-15 14:24:36,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:24:36,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:24:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:24:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:36,641 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:24:36,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 50 [2022-02-15 14:24:37,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:37,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2022-02-15 14:24:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:37,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:38,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:38,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:38,271 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-02-15 14:24:38,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 61 [2022-02-15 14:24:39,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:39,014 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:24:39,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-15 14:24:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:39,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031611939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:39,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:39,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-15 14:24:39,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002635521] [2022-02-15 14:24:39,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:39,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 14:24:39,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:39,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 14:24:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:24:39,091 INFO L87 Difference]: Start difference. First operand 68665 states and 288251 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:41,016 INFO L93 Difference]: Finished difference Result 96066 states and 398976 transitions. [2022-02-15 14:24:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:24:41,016 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:41,519 INFO L225 Difference]: With dead ends: 96066 [2022-02-15 14:24:41,519 INFO L226 Difference]: Without dead ends: 96053 [2022-02-15 14:24:41,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=2018, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 14:24:41,520 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 498 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1428 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:41,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 1341 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 339 Invalid, 0 Unknown, 1428 Unchecked, 0.2s Time] [2022-02-15 14:24:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96053 states. [2022-02-15 14:24:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96053 to 72023. [2022-02-15 14:24:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72023 states, 72022 states have (on average 4.203493377023687) internal successors, (302744), 72022 states have internal predecessors, (302744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72023 states to 72023 states and 302744 transitions. [2022-02-15 14:24:44,661 INFO L78 Accepts]: Start accepts. Automaton has 72023 states and 302744 transitions. Word has length 39 [2022-02-15 14:24:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:44,661 INFO L470 AbstractCegarLoop]: Abstraction has 72023 states and 302744 transitions. [2022-02-15 14:24:44,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 72023 states and 302744 transitions. [2022-02-15 14:24:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:44,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:44,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:44,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:45,059 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,SelfDestructingSolverStorable79 [2022-02-15 14:24:45,059 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1067608453, now seen corresponding path program 72 times [2022-02-15 14:24:45,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:45,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428371935] [2022-02-15 14:24:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:45,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:45,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:45,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428371935] [2022-02-15 14:24:45,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428371935] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:45,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772452061] [2022-02-15 14:24:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:24:45,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:45,219 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) [2022-02-15 14:24:45,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-15 14:24:45,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 14:24:45,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:24:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:24:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:45,726 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:24:45,727 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 47 treesize of output 29 [2022-02-15 14:24:45,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:45,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:45,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2022-02-15 14:24:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:45,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:46,403 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:46,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-02-15 14:24:46,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:46,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:46,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:46,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:24:46,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 52 [2022-02-15 14:24:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:46,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772452061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:46,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:46,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-15 14:24:46,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476239588] [2022-02-15 14:24:46,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:46,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:24:46,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:24:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:24:46,874 INFO L87 Difference]: Start difference. First operand 72023 states and 302744 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:48,684 INFO L93 Difference]: Finished difference Result 114310 states and 476438 transitions. [2022-02-15 14:24:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:24:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:49,480 INFO L225 Difference]: With dead ends: 114310 [2022-02-15 14:24:49,480 INFO L226 Difference]: Without dead ends: 114255 [2022-02-15 14:24:49,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:24:49,480 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 625 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1015 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 1200 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 685 Invalid, 0 Unknown, 1015 Unchecked, 0.3s Time] [2022-02-15 14:24:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114255 states. [2022-02-15 14:24:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114255 to 82307. [2022-02-15 14:24:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82307 states, 82306 states have (on average 4.227358880276043) internal successors, (347937), 82306 states have internal predecessors, (347937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82307 states to 82307 states and 347937 transitions. [2022-02-15 14:24:53,353 INFO L78 Accepts]: Start accepts. Automaton has 82307 states and 347937 transitions. Word has length 39 [2022-02-15 14:24:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:24:53,353 INFO L470 AbstractCegarLoop]: Abstraction has 82307 states and 347937 transitions. [2022-02-15 14:24:53,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 82307 states and 347937 transitions. [2022-02-15 14:24:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:24:53,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:24:53,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:24:53,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-15 14:24:53,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:53,806 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:24:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:24:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 234109921, now seen corresponding path program 73 times [2022-02-15 14:24:53,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:24:53,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864780325] [2022-02-15 14:24:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:24:53,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:24:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:53,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:24:53,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864780325] [2022-02-15 14:24:53,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864780325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:24:53,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3255435] [2022-02-15 14:24:53,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:24:53,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:24:53,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:24:53,943 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) [2022-02-15 14:24:53,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-15 14:24:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:24:53,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:24:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:24:54,437 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:24:54,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-02-15 14:24:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:24:54,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:24:54,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:24:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:54,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:24:54,689 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:54,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:24:54,853 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:24:54,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:24:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:24:54,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3255435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:24:54,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:24:54,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 14:24:54,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746274277] [2022-02-15 14:24:54,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:24:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:24:54,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:24:54,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:24:54,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:24:54,909 INFO L87 Difference]: Start difference. First operand 82307 states and 347937 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:24:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:24:56,248 INFO L93 Difference]: Finished difference Result 113471 states and 479211 transitions. [2022-02-15 14:24:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 14:24:56,248 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:24:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:24:56,827 INFO L225 Difference]: With dead ends: 113471 [2022-02-15 14:24:56,827 INFO L226 Difference]: Without dead ends: 113464 [2022-02-15 14:24:56,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:24:56,828 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 177 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:24:56,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 616 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 392 Invalid, 0 Unknown, 405 Unchecked, 0.2s Time] [2022-02-15 14:24:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113464 states. [2022-02-15 14:24:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113464 to 82645. [2022-02-15 14:24:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82645 states, 82644 states have (on average 4.226066018101737) internal successors, (349259), 82644 states have internal predecessors, (349259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82645 states to 82645 states and 349259 transitions. [2022-02-15 14:25:00,185 INFO L78 Accepts]: Start accepts. Automaton has 82645 states and 349259 transitions. Word has length 39 [2022-02-15 14:25:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:25:00,186 INFO L470 AbstractCegarLoop]: Abstraction has 82645 states and 349259 transitions. [2022-02-15 14:25:00,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 82645 states and 349259 transitions. [2022-02-15 14:25:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:25:00,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:25:00,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:25:00,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-15 14:25:00,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:00,985 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:25:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:25:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1634155451, now seen corresponding path program 74 times [2022-02-15 14:25:00,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:25:00,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950629828] [2022-02-15 14:25:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:25:00,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:25:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:25:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:01,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:25:01,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950629828] [2022-02-15 14:25:01,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950629828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:25:01,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45147589] [2022-02-15 14:25:01,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:25:01,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:01,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:25:01,177 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) [2022-02-15 14:25:01,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:25:01,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:25:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-15 14:25:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:25:01,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-15 14:25:01,601 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:25:01,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2022-02-15 14:25:01,645 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:25:01,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-02-15 14:25:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:01,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:25:02,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:02,490 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:25:02,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-02-15 14:25:02,607 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:25:02,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-02-15 14:25:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:02,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45147589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:25:02,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:25:02,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 14:25:02,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316555405] [2022-02-15 14:25:02,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:25:02,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:25:02,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:25:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:25:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:25:02,654 INFO L87 Difference]: Start difference. First operand 82645 states and 349259 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:25:04,903 INFO L93 Difference]: Finished difference Result 146170 states and 616686 transitions. [2022-02-15 14:25:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 14:25:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:25:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:25:06,124 INFO L225 Difference]: With dead ends: 146170 [2022-02-15 14:25:06,124 INFO L226 Difference]: Without dead ends: 146060 [2022-02-15 14:25:06,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:25:06,125 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 495 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:25:06,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 1245 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1051 Invalid, 0 Unknown, 742 Unchecked, 0.4s Time] [2022-02-15 14:25:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146060 states. [2022-02-15 14:25:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146060 to 76870. [2022-02-15 14:25:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76870 states, 76869 states have (on average 4.228414575446539) internal successors, (325034), 76869 states have internal predecessors, (325034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76870 states to 76870 states and 325034 transitions. [2022-02-15 14:25:09,798 INFO L78 Accepts]: Start accepts. Automaton has 76870 states and 325034 transitions. Word has length 39 [2022-02-15 14:25:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:25:09,798 INFO L470 AbstractCegarLoop]: Abstraction has 76870 states and 325034 transitions. [2022-02-15 14:25:09,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 76870 states and 325034 transitions. [2022-02-15 14:25:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:25:10,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:25:10,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:25:10,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-15 14:25:10,263 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,SelfDestructingSolverStorable82 [2022-02-15 14:25:10,263 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:25:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:25:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1392633403, now seen corresponding path program 75 times [2022-02-15 14:25:10,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:25:10,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271357430] [2022-02-15 14:25:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:25:10,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:25:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:25:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:10,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:25:10,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271357430] [2022-02-15 14:25:10,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271357430] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:25:10,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838446168] [2022-02-15 14:25:10,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:25:10,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:10,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:25:10,789 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) [2022-02-15 14:25:10,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-15 14:25:10,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:25:10,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:25:10,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-15 14:25:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:25:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:11,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:25:11,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 56 [2022-02-15 14:25:11,351 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-15 14:25:11,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2022-02-15 14:25:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:11,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:25:11,839 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:25:11,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-02-15 14:25:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:25:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:25:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:12,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:25:12,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-02-15 14:25:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:12,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838446168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:25:12,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:25:12,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-02-15 14:25:12,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191211372] [2022-02-15 14:25:12,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:25:12,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:25:12,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:25:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:25:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:25:12,380 INFO L87 Difference]: Start difference. First operand 76870 states and 325034 transitions. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:25:13,745 INFO L93 Difference]: Finished difference Result 102332 states and 429727 transitions. [2022-02-15 14:25:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 14:25:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:25:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:25:14,273 INFO L225 Difference]: With dead ends: 102332 [2022-02-15 14:25:14,273 INFO L226 Difference]: Without dead ends: 102313 [2022-02-15 14:25:14,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:25:14,274 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 324 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:25:14,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1086 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 464 Invalid, 0 Unknown, 544 Unchecked, 0.2s Time] [2022-02-15 14:25:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102313 states. [2022-02-15 14:25:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102313 to 78635. [2022-02-15 14:25:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78635 states, 78634 states have (on average 4.228107434443117) internal successors, (332473), 78634 states have internal predecessors, (332473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78635 states to 78635 states and 332473 transitions. [2022-02-15 14:25:17,466 INFO L78 Accepts]: Start accepts. Automaton has 78635 states and 332473 transitions. Word has length 39 [2022-02-15 14:25:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:25:17,466 INFO L470 AbstractCegarLoop]: Abstraction has 78635 states and 332473 transitions. [2022-02-15 14:25:17,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 78635 states and 332473 transitions. [2022-02-15 14:25:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:25:17,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:25:17,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:25:17,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-15 14:25:17,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:17,897 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:25:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:25:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1894624993, now seen corresponding path program 76 times [2022-02-15 14:25:17,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:25:17,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941126808] [2022-02-15 14:25:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:25:17,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:25:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:25:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:18,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:25:18,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941126808] [2022-02-15 14:25:18,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941126808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:25:18,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431692266] [2022-02-15 14:25:18,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:25:18,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:25:18,048 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) [2022-02-15 14:25:18,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-15 14:25:18,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:25:18,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:25:18,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:25:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:25:18,502 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:25:18,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-02-15 14:25:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:18,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:18,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:25:18,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-02-15 14:25:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:18,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:25:18,922 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:25:18,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-02-15 14:25:19,055 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:25:19,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-02-15 14:25:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:19,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431692266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:25:19,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:25:19,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 14:25:19,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116171587] [2022-02-15 14:25:19,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:25:19,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:25:19,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:25:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:25:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:25:19,102 INFO L87 Difference]: Start difference. First operand 78635 states and 332473 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:25:20,266 INFO L93 Difference]: Finished difference Result 126534 states and 535227 transitions. [2022-02-15 14:25:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 14:25:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:25:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:25:21,551 INFO L225 Difference]: With dead ends: 126534 [2022-02-15 14:25:21,551 INFO L226 Difference]: Without dead ends: 126527 [2022-02-15 14:25:21,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-15 14:25:21,553 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 183 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:25:21,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 719 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 475 Invalid, 0 Unknown, 288 Unchecked, 0.1s Time] [2022-02-15 14:25:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126527 states. [2022-02-15 14:25:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126527 to 84909. [2022-02-15 14:25:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84909 states, 84908 states have (on average 4.2318391670985065) internal successors, (359317), 84908 states have internal predecessors, (359317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84909 states to 84909 states and 359317 transitions. [2022-02-15 14:25:25,333 INFO L78 Accepts]: Start accepts. Automaton has 84909 states and 359317 transitions. Word has length 39 [2022-02-15 14:25:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:25:25,333 INFO L470 AbstractCegarLoop]: Abstraction has 84909 states and 359317 transitions. [2022-02-15 14:25:25,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 84909 states and 359317 transitions. [2022-02-15 14:25:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:25:25,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:25:25,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:25:25,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-15 14:25:25,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:25,753 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:25:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:25:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1359791373, now seen corresponding path program 77 times [2022-02-15 14:25:25,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:25:25,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276373396] [2022-02-15 14:25:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:25:25,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:25:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:25:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:26,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:25:26,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276373396] [2022-02-15 14:25:26,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276373396] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:25:26,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347494433] [2022-02-15 14:25:26,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:25:26,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:25:26,346 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) [2022-02-15 14:25:26,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-15 14:25:26,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:25:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:25:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-15 14:25:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:25:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:26,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:25:26,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 74 [2022-02-15 14:25:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:26,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:25:26,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 59 [2022-02-15 14:25:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:26,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:25:27,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:27,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:25:27,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:25:27,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:27,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 41 [2022-02-15 14:25:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:25:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:25:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:28,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 17 [2022-02-15 14:25:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:28,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347494433] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:25:28,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:25:28,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-02-15 14:25:28,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273635672] [2022-02-15 14:25:28,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:25:28,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:25:28,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:25:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:25:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:25:28,052 INFO L87 Difference]: Start difference. First operand 84909 states and 359317 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:25:32,468 INFO L93 Difference]: Finished difference Result 198242 states and 829651 transitions. [2022-02-15 14:25:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 14:25:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:25:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:25:34,273 INFO L225 Difference]: With dead ends: 198242 [2022-02-15 14:25:34,273 INFO L226 Difference]: Without dead ends: 198082 [2022-02-15 14:25:34,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 77 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=782, Invalid=4188, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 14:25:34,273 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 838 mSDsluCounter, 2943 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 765 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:25:34,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 2113 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1697 Invalid, 0 Unknown, 765 Unchecked, 0.9s Time] [2022-02-15 14:25:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198082 states. [2022-02-15 14:25:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198082 to 121726. [2022-02-15 14:25:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121726 states, 121725 states have (on average 4.289669336619429) internal successors, (522160), 121725 states have internal predecessors, (522160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121726 states to 121726 states and 522160 transitions. [2022-02-15 14:25:40,548 INFO L78 Accepts]: Start accepts. Automaton has 121726 states and 522160 transitions. Word has length 39 [2022-02-15 14:25:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:25:40,548 INFO L470 AbstractCegarLoop]: Abstraction has 121726 states and 522160 transitions. [2022-02-15 14:25:40,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 121726 states and 522160 transitions. [2022-02-15 14:25:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:25:41,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:25:41,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:25:41,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-15 14:25:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:41,482 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:25:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:25:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash -958641139, now seen corresponding path program 78 times [2022-02-15 14:25:41,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:25:41,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828817682] [2022-02-15 14:25:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:25:41,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:25:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:25:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:41,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:25:41,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828817682] [2022-02-15 14:25:41,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828817682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:25:41,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793753643] [2022-02-15 14:25:41,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:25:41,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:41,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:25:41,668 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) [2022-02-15 14:25:41,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-15 14:25:41,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 14:25:41,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:25:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:25:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:25:41,965 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:25:41,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-02-15 14:25:42,019 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-15 14:25:42,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-02-15 14:25:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:42,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:25:42,411 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:25:42,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-02-15 14:25:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:25:42,840 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:25:42,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-15 14:25:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:25:43,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793753643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:25:43,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:25:43,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-02-15 14:25:43,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536517219] [2022-02-15 14:25:43,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:25:43,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:25:43,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:25:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:25:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:25:43,012 INFO L87 Difference]: Start difference. First operand 121726 states and 522160 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:25:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:25:46,811 INFO L93 Difference]: Finished difference Result 215833 states and 923727 transitions. [2022-02-15 14:25:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:25:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-15 14:25:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:25:48,462 INFO L225 Difference]: With dead ends: 215833 [2022-02-15 14:25:48,462 INFO L226 Difference]: Without dead ends: 215723 [2022-02-15 14:25:48,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=2472, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:25:48,462 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 508 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 786 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:25:48,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1724 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1237 Invalid, 0 Unknown, 786 Unchecked, 0.5s Time] [2022-02-15 14:25:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215723 states. [2022-02-15 14:25:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215723 to 128651. [2022-02-15 14:25:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128651 states, 128650 states have (on average 4.291371939370385) internal successors, (552085), 128650 states have internal predecessors, (552085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)