/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/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:14:43,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:14:43,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:14:43,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:14:43,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 17:14:43,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 17:14:43,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 17:14:43,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:14:43,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:14:43,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:14:43,131 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:14:43,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:14:43,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:14:43,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:14:43,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:14:43,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:14:43,132 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:14:43,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:14:43,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:14:43,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:14:43,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:14:43,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:14:43,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:14:43,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:14:43,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:14:43,327 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:14:43,328 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:14:43,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2022-03-01 17:14:43,329 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2022-03-01 17:14:43,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:14:43,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:14:43,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:14:43,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:14:43,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:14:43,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,366 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:14:43,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:14:43,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:14:43,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:14:43,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:14:43,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:14:43,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:14:43,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:14:43,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:14:43,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/1) ... [2022-03-01 17:14:43,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:14:43,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:14:43,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:14:43,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:14:43,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:14:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:14:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:14:43,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:14:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:14:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:14:43,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:14:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:14:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:14:43,428 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:14:43,459 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:14:43,460 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:14:43,523 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:14:43,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:14:43,552 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-01 17:14:43,552 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-01 17:14:43,553 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-01 17:14:43,554 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:14:43 BoogieIcfgContainer [2022-03-01 17:14:43,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:14:43,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:14:43,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:14:43,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:14:43,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:14:43" (1/2) ... [2022-03-01 17:14:43,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a5ba7e and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:14:43, skipping insertion in model container [2022-03-01 17:14:43,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:14:43" (2/2) ... [2022-03-01 17:14:43,560 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2022-03-01 17:14:43,564 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:14:43,564 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:14:43,564 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:14:43,564 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:14:43,594 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 17:14:43,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:14:43,640 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:14:43,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 17:14:43,647 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-03-01 17:14:43,656 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-03-01 17:14:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-03-01 17:14:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-01 17:14:43,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:43,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:43,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:43,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1674208439, now seen corresponding path program 1 times [2022-03-01 17:14:43,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:43,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555358962] [2022-03-01 17:14:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:43,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:43,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555358962] [2022-03-01 17:14:43,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555358962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:14:43,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:14:43,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 17:14:43,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250119493] [2022-03-01 17:14:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:14:43,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:14:43,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:14:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:14:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:14:43,803 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:14:43,827 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2022-03-01 17:14:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:14:43,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-01 17:14:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:14:43,835 INFO L225 Difference]: With dead ends: 22 [2022-03-01 17:14:43,835 INFO L226 Difference]: Without dead ends: 19 [2022-03-01 17:14:43,836 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 [2022-03-01 17:14:43,839 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:14:43,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:14:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-01 17:14:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-01 17:14:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2022-03-01 17:14:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2022-03-01 17:14:43,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2022-03-01 17:14:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:14:43,902 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2022-03-01 17:14:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2022-03-01 17:14:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-01 17:14:43,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:43,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:43,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:14:43,903 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash 361579940, now seen corresponding path program 1 times [2022-03-01 17:14:43,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:43,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032381811] [2022-03-01 17:14:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:43,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:43,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032381811] [2022-03-01 17:14:43,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032381811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:14:43,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:14:43,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:14:43,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562307282] [2022-03-01 17:14:43,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:14:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:14:43,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:14:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:14:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:14:43,974 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:14:44,037 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2022-03-01 17:14:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:14:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-01 17:14:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:14:44,038 INFO L225 Difference]: With dead ends: 19 [2022-03-01 17:14:44,038 INFO L226 Difference]: Without dead ends: 15 [2022-03-01 17:14:44,038 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 [2022-03-01 17:14:44,039 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:14:44,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:14:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-01 17:14:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-01 17:14:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2022-03-01 17:14:44,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2022-03-01 17:14:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:14:44,042 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2022-03-01 17:14:44,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2022-03-01 17:14:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-01 17:14:44,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:44,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:44,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:14:44,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1024668018, now seen corresponding path program 1 times [2022-03-01 17:14:44,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:44,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317549165] [2022-03-01 17:14:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:44,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:44,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:44,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317549165] [2022-03-01 17:14:44,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317549165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:14:44,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653672672] [2022-03-01 17:14:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:44,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:14:44,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:14:44,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:14:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 17:14:44,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:14:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:44,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:14:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:44,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653672672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:14:44,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:14:44,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-01 17:14:44,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793160655] [2022-03-01 17:14:44,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:14:44,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:14:44,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:14:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:14:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:14:44,305 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:14:44,345 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2022-03-01 17:14:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:14:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-01 17:14:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:14:44,346 INFO L225 Difference]: With dead ends: 18 [2022-03-01 17:14:44,346 INFO L226 Difference]: Without dead ends: 18 [2022-03-01 17:14:44,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:14:44,348 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:14:44,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 7 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:14:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-01 17:14:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-01 17:14:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2022-03-01 17:14:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2022-03-01 17:14:44,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2022-03-01 17:14:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:14:44,355 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2022-03-01 17:14:44,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2022-03-01 17:14:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-01 17:14:44,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:44,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:44,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:14:44,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:44,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1495291916, now seen corresponding path program 2 times [2022-03-01 17:14:44,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:44,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104426026] [2022-03-01 17:14:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:44,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:44,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104426026] [2022-03-01 17:14:44,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104426026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:14:44,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:14:44,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:14:44,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236197548] [2022-03-01 17:14:44,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:14:44,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:14:44,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:14:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:14:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:14:44,596 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:14:44,621 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2022-03-01 17:14:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:14:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-01 17:14:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:14:44,622 INFO L225 Difference]: With dead ends: 20 [2022-03-01 17:14:44,622 INFO L226 Difference]: Without dead ends: 20 [2022-03-01 17:14:44,623 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 [2022-03-01 17:14:44,624 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:14:44,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:14:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-01 17:14:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-01 17:14:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2022-03-01 17:14:44,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2022-03-01 17:14:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:14:44,627 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2022-03-01 17:14:44,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2022-03-01 17:14:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:14:44,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:44,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:44,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:14:44,628 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1700663369, now seen corresponding path program 1 times [2022-03-01 17:14:44,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:44,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021491262] [2022-03-01 17:14:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:14:44,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:44,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021491262] [2022-03-01 17:14:44,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021491262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:14:44,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87907680] [2022-03-01 17:14:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:44,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:14:44,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:14:44,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:14:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 17:14:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:14:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:14:44,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:14:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:14:44,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87907680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:14:44,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:14:44,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-01 17:14:44,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900222424] [2022-03-01 17:14:44,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:14:44,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:14:44,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:14:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:14:44,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:14:44,775 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:14:44,809 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2022-03-01 17:14:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:14:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:14:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:14:44,810 INFO L225 Difference]: With dead ends: 28 [2022-03-01 17:14:44,810 INFO L226 Difference]: Without dead ends: 28 [2022-03-01 17:14:44,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:14:44,815 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:14:44,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:14:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-01 17:14:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-01 17:14:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2022-03-01 17:14:44,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 11 [2022-03-01 17:14:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:14:44,827 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2022-03-01 17:14:44,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2022-03-01 17:14:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:14:44,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:44,828 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:44,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:14:45,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:45,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:45,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1368436823, now seen corresponding path program 2 times [2022-03-01 17:14:45,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:45,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748530183] [2022-03-01 17:14:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:45,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:14:45,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:45,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748530183] [2022-03-01 17:14:45,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748530183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:14:45,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121420909] [2022-03-01 17:14:45,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:14:45,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:45,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:14:45,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:14:45,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:14:45,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:14:45,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:14:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:14:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:14:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:14:45,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:14:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:14:45,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121420909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:14:45,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:14:45,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-01 17:14:45,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918261489] [2022-03-01 17:14:45,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:14:45,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:14:45,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:14:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:14:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:14:45,277 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:14:45,334 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2022-03-01 17:14:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:14:45,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:14:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:14:45,335 INFO L225 Difference]: With dead ends: 36 [2022-03-01 17:14:45,335 INFO L226 Difference]: Without dead ends: 36 [2022-03-01 17:14:45,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:14:45,336 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:14:45,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:14:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-01 17:14:45,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-01 17:14:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2022-03-01 17:14:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2022-03-01 17:14:45,371 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2022-03-01 17:14:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:14:45,371 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2022-03-01 17:14:45,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:14:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2022-03-01 17:14:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:14:45,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:45,372 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:45,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:14:45,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:45,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:45,586 INFO L85 PathProgramCache]: Analyzing trace with hash -131188983, now seen corresponding path program 3 times [2022-03-01 17:14:45,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:45,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220045487] [2022-03-01 17:14:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:45,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:45,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220045487] [2022-03-01 17:14:45,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220045487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:14:45,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132438204] [2022-03-01 17:14:45,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:14:45,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:45,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:14:45,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:14:45,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:14:45,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:14:45,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:14:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:14:45,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:14:45,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:14:45,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-03-01 17:14:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:46,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:14:46,492 INFO L353 Elim1Store]: treesize reduction 25, result has 93.1 percent of original size [2022-03-01 17:14:46,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 23 treesize of output 371 [2022-03-01 17:14:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:57,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132438204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:14:57,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:14:57,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-03-01 17:14:57,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632552407] [2022-03-01 17:14:57,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:14:57,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:14:57,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:14:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:14:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:14:57,025 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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) [2022-03-01 17:14:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:14:57,245 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2022-03-01 17:14:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:14:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 15 [2022-03-01 17:14:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:14:57,250 INFO L225 Difference]: With dead ends: 93 [2022-03-01 17:14:57,250 INFO L226 Difference]: Without dead ends: 90 [2022-03-01 17:14:57,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:14:57,251 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:14:57,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 74 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:14:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-01 17:14:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2022-03-01 17:14:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 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) [2022-03-01 17:14:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2022-03-01 17:14:57,269 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2022-03-01 17:14:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:14:57,269 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2022-03-01 17:14:57,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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) [2022-03-01 17:14:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2022-03-01 17:14:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:14:57,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:14:57,270 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:14:57,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-01 17:14:57,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:57,490 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:14:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:14:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -277447531, now seen corresponding path program 4 times [2022-03-01 17:14:57,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:14:57,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402453697] [2022-03-01 17:14:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:14:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:14:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:14:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:14:57,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:14:57,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402453697] [2022-03-01 17:14:57,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402453697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:14:57,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071417951] [2022-03-01 17:14:57,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:14:57,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:14:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:14:57,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:14:57,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:14:57,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:14:57,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:14:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:14:57,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:14:57,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:14:57,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-03-01 17:14:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:14:57,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:14:58,192 INFO L353 Elim1Store]: treesize reduction 25, result has 93.1 percent of original size [2022-03-01 17:14:58,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 23 treesize of output 371 [2022-03-01 17:15:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:15:29,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071417951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:15:29,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:15:29,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-03-01 17:15:29,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980692183] [2022-03-01 17:15:29,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:15:29,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:15:29,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:15:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:15:29,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:15:29,043 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:15:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:15:29,191 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2022-03-01 17:15:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:15:29,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:15:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:15:29,192 INFO L225 Difference]: With dead ends: 103 [2022-03-01 17:15:29,192 INFO L226 Difference]: Without dead ends: 100 [2022-03-01 17:15:29,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:15:29,197 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:15:29,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 69 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:15:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-01 17:15:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2022-03-01 17:15:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:15:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2022-03-01 17:15:29,201 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2022-03-01 17:15:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:15:29,202 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2022-03-01 17:15:29,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:15:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2022-03-01 17:15:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:15:29,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:15:29,202 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:15:29,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:15:29,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:15:29,419 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:15:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:15:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1211957465, now seen corresponding path program 5 times [2022-03-01 17:15:29,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:15:29,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245687783] [2022-03-01 17:15:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:15:29,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:15:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:15:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:15:29,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:15:29,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245687783] [2022-03-01 17:15:29,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245687783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:15:29,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973278027] [2022-03-01 17:15:29,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:15:29,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:15:29,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:15:29,466 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:15:29,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:15:29,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:15:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:15:29,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:15:29,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:15:29,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:15:29,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-03-01 17:15:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:15:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:15:30,121 INFO L353 Elim1Store]: treesize reduction 25, result has 93.1 percent of original size [2022-03-01 17:15:30,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 23 treesize of output 371 [2022-03-01 17:16:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:16:04,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973278027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:16:04,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:16:04,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-03-01 17:16:04,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790450658] [2022-03-01 17:16:04,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:16:04,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:16:04,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:16:04,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:16:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:16:04,027 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:16:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:16:04,245 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2022-03-01 17:16:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:16:04,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:16:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:16:04,246 INFO L225 Difference]: With dead ends: 113 [2022-03-01 17:16:04,246 INFO L226 Difference]: Without dead ends: 110 [2022-03-01 17:16:04,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:16:04,247 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:16:04,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 59 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:16:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-01 17:16:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2022-03-01 17:16:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:16:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2022-03-01 17:16:04,250 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2022-03-01 17:16:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:16:04,250 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2022-03-01 17:16:04,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:16:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2022-03-01 17:16:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:16:04,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:16:04,251 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:16:04,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:16:04,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:16:04,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:16:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:16:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash 138872085, now seen corresponding path program 6 times [2022-03-01 17:16:04,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:16:04,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434570241] [2022-03-01 17:16:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:16:04,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:16:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:16:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:16:04,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:16:04,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434570241] [2022-03-01 17:16:04,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434570241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:16:04,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72339984] [2022-03-01 17:16:04,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:16:04,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:16:04,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:16:04,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:16:04,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:16:04,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:16:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:16:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:16:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:16:04,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:16:04,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-03-01 17:16:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:16:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:16:05,029 INFO L353 Elim1Store]: treesize reduction 25, result has 93.1 percent of original size [2022-03-01 17:16:05,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 23 treesize of output 371 [2022-03-01 17:16:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:16:53,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72339984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:16:53,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:16:53,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-03-01 17:16:53,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200041494] [2022-03-01 17:16:53,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:16:53,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:16:53,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:16:53,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:16:53,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:16:53,422 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2022-03-01 17:16:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:16:53,630 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2022-03-01 17:16:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:16:53,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 15 [2022-03-01 17:16:53,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:16:53,631 INFO L225 Difference]: With dead ends: 124 [2022-03-01 17:16:53,631 INFO L226 Difference]: Without dead ends: 121 [2022-03-01 17:16:53,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:16:53,632 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:16:53,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:16:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-01 17:16:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2022-03-01 17:16:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:16:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2022-03-01 17:16:53,636 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2022-03-01 17:16:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:16:53,636 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2022-03-01 17:16:53,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2022-03-01 17:16:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2022-03-01 17:16:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:16:53,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:16:53,637 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:16:53,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:16:53,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:16:53,838 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:16:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:16:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1232963673, now seen corresponding path program 7 times [2022-03-01 17:16:53,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:16:53,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773997921] [2022-03-01 17:16:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:16:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:16:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:16:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:16:53,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:16:53,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773997921] [2022-03-01 17:16:53,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773997921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:16:53,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225830237] [2022-03-01 17:16:53,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:16:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:16:53,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:16:53,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:16:53,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:16:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:16:53,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:16:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:16:54,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:16:54,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-03-01 17:16:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:16:54,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:16:54,535 INFO L353 Elim1Store]: treesize reduction 25, result has 93.1 percent of original size [2022-03-01 17:16:54,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 23 treesize of output 371 [2022-03-01 17:17:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:17:48,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225830237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:17:48,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:17:48,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2022-03-01 17:17:48,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506665219] [2022-03-01 17:17:48,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:17:48,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:17:48,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:17:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:17:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:17:48,539 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:17:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:17:48,713 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2022-03-01 17:17:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:17:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:17:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:17:48,714 INFO L225 Difference]: With dead ends: 136 [2022-03-01 17:17:48,714 INFO L226 Difference]: Without dead ends: 133 [2022-03-01 17:17:48,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:17:48,714 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:17:48,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 65 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:17:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-01 17:17:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2022-03-01 17:17:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:17:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2022-03-01 17:17:48,723 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2022-03-01 17:17:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:17:48,724 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2022-03-01 17:17:48,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:17:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2022-03-01 17:17:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:17:48,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:17:48,725 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:17:48,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:17:48,936 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,SelfDestructingSolverStorable10 [2022-03-01 17:17:48,937 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:17:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:17:48,937 INFO L85 PathProgramCache]: Analyzing trace with hash 790064533, now seen corresponding path program 8 times [2022-03-01 17:17:48,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:17:48,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028165896] [2022-03-01 17:17:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:17:48,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:17:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:17:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:17:48,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:17:48,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028165896] [2022-03-01 17:17:48,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028165896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:17:48,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062418844] [2022-03-01 17:17:48,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:17:48,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:17:48,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:17:48,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:17:48,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:17:49,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:17:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:17:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:17:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:17:49,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:17:49,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-03-01 17:17:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:17:49,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:17:49,577 INFO L353 Elim1Store]: treesize reduction 25, result has 93.1 percent of original size [2022-03-01 17:17:49,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 23 treesize of output 371 [2022-03-01 17:18:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:39,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062418844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:39,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:39,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2022-03-01 17:18:39,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044873977] [2022-03-01 17:18:39,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:39,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:18:39,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:18:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:18:39,987 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2022-03-01 17:18:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:40,159 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2022-03-01 17:18:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:18:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2022-03-01 17:18:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:40,161 INFO L225 Difference]: With dead ends: 149 [2022-03-01 17:18:40,161 INFO L226 Difference]: Without dead ends: 146 [2022-03-01 17:18:40,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:18:40,161 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:40,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 65 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:18:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-01 17:18:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2022-03-01 17:18:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2022-03-01 17:18:40,165 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2022-03-01 17:18:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2022-03-01 17:18:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2022-03-01 17:18:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2022-03-01 17:18:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:40,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:40,167 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:40,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:40,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:40,375 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash 228834706, now seen corresponding path program 9 times [2022-03-01 17:18:40,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:40,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27233142] [2022-03-01 17:18:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:40,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:40,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27233142] [2022-03-01 17:18:40,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27233142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:40,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336403685] [2022-03-01 17:18:40,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:18:40,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:40,448 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:40,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:18:40,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:18:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:40,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:40,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336403685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:40,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:40,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:40,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945738777] [2022-03-01 17:18:40,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:40,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:40,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:40,614 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:40,801 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2022-03-01 17:18:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:18:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:40,803 INFO L225 Difference]: With dead ends: 201 [2022-03-01 17:18:40,803 INFO L226 Difference]: Without dead ends: 196 [2022-03-01 17:18:40,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:18:40,803 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:40,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 29 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-01 17:18:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 117. [2022-03-01 17:18:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.8879310344827585) internal successors, (335), 116 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 335 transitions. [2022-03-01 17:18:40,808 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 335 transitions. Word has length 16 [2022-03-01 17:18:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:40,808 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 335 transitions. [2022-03-01 17:18:40,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 335 transitions. [2022-03-01 17:18:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:40,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:40,809 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:40,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:41,009 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,SelfDestructingSolverStorable12 [2022-03-01 17:18:41,010 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash -690271356, now seen corresponding path program 10 times [2022-03-01 17:18:41,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:41,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566067906] [2022-03-01 17:18:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:41,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:41,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:41,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566067906] [2022-03-01 17:18:41,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566067906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:41,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222258038] [2022-03-01 17:18:41,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:18:41,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:41,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:41,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:18:41,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:18:41,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:41,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:41,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:41,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222258038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:41,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:41,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:41,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759022157] [2022-03-01 17:18:41,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:41,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:41,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:41,229 INFO L87 Difference]: Start difference. First operand 117 states and 335 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:41,421 INFO L93 Difference]: Finished difference Result 203 states and 449 transitions. [2022-03-01 17:18:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:18:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:41,423 INFO L225 Difference]: With dead ends: 203 [2022-03-01 17:18:41,423 INFO L226 Difference]: Without dead ends: 201 [2022-03-01 17:18:41,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:18:41,424 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:41,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 71 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-01 17:18:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2022-03-01 17:18:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2022-03-01 17:18:41,428 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2022-03-01 17:18:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:41,428 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2022-03-01 17:18:41,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2022-03-01 17:18:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:41,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:41,429 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:41,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:41,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 17:18:41,646 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash 72393506, now seen corresponding path program 11 times [2022-03-01 17:18:41,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:41,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122486431] [2022-03-01 17:18:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:41,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:41,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:41,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122486431] [2022-03-01 17:18:41,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122486431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:41,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790631581] [2022-03-01 17:18:41,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:18:41,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:41,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:41,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:41,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:18:41,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:18:41,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:41,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:41,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:41,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790631581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:41,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:41,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:41,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963973186] [2022-03-01 17:18:41,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:41,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:41,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:41,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:41,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:41,924 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:42,073 INFO L93 Difference]: Finished difference Result 161 states and 401 transitions. [2022-03-01 17:18:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:18:42,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:42,075 INFO L225 Difference]: With dead ends: 161 [2022-03-01 17:18:42,075 INFO L226 Difference]: Without dead ends: 160 [2022-03-01 17:18:42,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:18:42,075 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:42,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 33 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:42,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-01 17:18:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 126. [2022-03-01 17:18:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2022-03-01 17:18:42,079 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2022-03-01 17:18:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:42,079 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2022-03-01 17:18:42,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2022-03-01 17:18:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:42,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:42,079 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:42,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-01 17:18:42,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 17:18:42,280 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 938477458, now seen corresponding path program 12 times [2022-03-01 17:18:42,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:42,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363680673] [2022-03-01 17:18:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:42,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:42,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:42,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363680673] [2022-03-01 17:18:42,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363680673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:42,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148629404] [2022-03-01 17:18:42,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:18:42,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:42,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:42,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:18:42,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:18:42,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:42,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:42,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:42,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:42,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148629404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:42,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:42,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:42,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771953100] [2022-03-01 17:18:42,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:42,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:42,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:42,508 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:42,575 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2022-03-01 17:18:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:18:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:42,576 INFO L225 Difference]: With dead ends: 214 [2022-03-01 17:18:42,576 INFO L226 Difference]: Without dead ends: 214 [2022-03-01 17:18:42,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:42,577 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 156 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:42,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 23 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-01 17:18:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2022-03-01 17:18:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2022-03-01 17:18:42,581 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2022-03-01 17:18:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:42,583 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2022-03-01 17:18:42,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2022-03-01 17:18:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:42,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:42,583 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:42,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-01 17:18:42,784 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,SelfDestructingSolverStorable15 [2022-03-01 17:18:42,784 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:42,785 INFO L85 PathProgramCache]: Analyzing trace with hash -10212986, now seen corresponding path program 13 times [2022-03-01 17:18:42,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:42,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497537662] [2022-03-01 17:18:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:42,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:42,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:42,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497537662] [2022-03-01 17:18:42,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497537662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:42,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858365565] [2022-03-01 17:18:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:18:42,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:42,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:42,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:18:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:42,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:43,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858365565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:43,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:43,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:43,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531302755] [2022-03-01 17:18:43,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:43,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:43,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:43,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:43,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:43,022 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:43,529 INFO L93 Difference]: Finished difference Result 392 states and 743 transitions. [2022-03-01 17:18:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:18:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:43,531 INFO L225 Difference]: With dead ends: 392 [2022-03-01 17:18:43,531 INFO L226 Difference]: Without dead ends: 388 [2022-03-01 17:18:43,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=917, Invalid=1839, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:18:43,532 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 223 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:43,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 49 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-03-01 17:18:43,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 126. [2022-03-01 17:18:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.8) internal successors, (350), 125 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 350 transitions. [2022-03-01 17:18:43,538 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 350 transitions. Word has length 16 [2022-03-01 17:18:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:43,538 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 350 transitions. [2022-03-01 17:18:43,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 350 transitions. [2022-03-01 17:18:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:43,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:43,539 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:43,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 17:18:43,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:43,739 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash 652875092, now seen corresponding path program 14 times [2022-03-01 17:18:43,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:43,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227109362] [2022-03-01 17:18:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:43,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227109362] [2022-03-01 17:18:43,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227109362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:43,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742630042] [2022-03-01 17:18:43,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:18:43,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:43,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:43,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:18:43,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:18:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:43,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:43,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742630042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:43,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:43,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:43,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497345570] [2022-03-01 17:18:43,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:43,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:43,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:43,941 INFO L87 Difference]: Start difference. First operand 126 states and 350 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:44,070 INFO L93 Difference]: Finished difference Result 218 states and 479 transitions. [2022-03-01 17:18:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:18:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:44,071 INFO L225 Difference]: With dead ends: 218 [2022-03-01 17:18:44,071 INFO L226 Difference]: Without dead ends: 218 [2022-03-01 17:18:44,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=314, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:18:44,072 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:44,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 59 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-01 17:18:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 132. [2022-03-01 17:18:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7938931297709924) internal successors, (366), 131 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 366 transitions. [2022-03-01 17:18:44,076 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 366 transitions. Word has length 16 [2022-03-01 17:18:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:44,076 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 366 transitions. [2022-03-01 17:18:44,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 366 transitions. [2022-03-01 17:18:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:44,077 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:44,077 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:44,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-01 17:18:44,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:18:44,278 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1561798502, now seen corresponding path program 15 times [2022-03-01 17:18:44,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:44,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83949409] [2022-03-01 17:18:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:44,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:44,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83949409] [2022-03-01 17:18:44,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83949409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:44,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829015878] [2022-03-01 17:18:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:18:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:44,339 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:44,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:18:44,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:18:44,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:44,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:44,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:44,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829015878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:44,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:44,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:44,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330930659] [2022-03-01 17:18:44,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:44,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:44,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:44,477 INFO L87 Difference]: Start difference. First operand 132 states and 366 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:44,639 INFO L93 Difference]: Finished difference Result 217 states and 474 transitions. [2022-03-01 17:18:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:18:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:44,641 INFO L225 Difference]: With dead ends: 217 [2022-03-01 17:18:44,641 INFO L226 Difference]: Without dead ends: 216 [2022-03-01 17:18:44,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:18:44,641 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:44,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 63 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-01 17:18:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 132. [2022-03-01 17:18:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.786259541984733) internal successors, (365), 131 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 365 transitions. [2022-03-01 17:18:44,645 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 365 transitions. Word has length 16 [2022-03-01 17:18:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:44,645 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 365 transitions. [2022-03-01 17:18:44,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 365 transitions. [2022-03-01 17:18:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:44,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:44,646 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:44,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:44,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:44,863 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:44,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1867084842, now seen corresponding path program 16 times [2022-03-01 17:18:44,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:44,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118347490] [2022-03-01 17:18:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:44,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:44,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118347490] [2022-03-01 17:18:44,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118347490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:44,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745445519] [2022-03-01 17:18:44,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:18:44,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:44,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:44,926 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:44,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:18:44,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:18:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:44,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:45,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745445519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:45,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:45,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:45,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503288053] [2022-03-01 17:18:45,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:45,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:45,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:45,070 INFO L87 Difference]: Start difference. First operand 132 states and 365 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:45,338 INFO L93 Difference]: Finished difference Result 384 states and 743 transitions. [2022-03-01 17:18:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:18:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:45,339 INFO L225 Difference]: With dead ends: 384 [2022-03-01 17:18:45,339 INFO L226 Difference]: Without dead ends: 384 [2022-03-01 17:18:45,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=542, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:18:45,340 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:45,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 47 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-01 17:18:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 132. [2022-03-01 17:18:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.786259541984733) internal successors, (365), 131 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 365 transitions. [2022-03-01 17:18:45,345 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 365 transitions. Word has length 16 [2022-03-01 17:18:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:45,345 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 365 transitions. [2022-03-01 17:18:45,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 365 transitions. [2022-03-01 17:18:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:45,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:45,346 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:45,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:45,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:45,574 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:45,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1877862140, now seen corresponding path program 17 times [2022-03-01 17:18:45,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:45,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555912014] [2022-03-01 17:18:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:45,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:45,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:45,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555912014] [2022-03-01 17:18:45,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555912014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:45,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39094073] [2022-03-01 17:18:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:18:45,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:45,635 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:45,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:18:45,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:18:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:45,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:45,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39094073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:45,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:45,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:45,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023792257] [2022-03-01 17:18:45,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:45,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:45,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:45,791 INFO L87 Difference]: Start difference. First operand 132 states and 365 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:45,943 INFO L93 Difference]: Finished difference Result 192 states and 447 transitions. [2022-03-01 17:18:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:18:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:45,945 INFO L225 Difference]: With dead ends: 192 [2022-03-01 17:18:45,945 INFO L226 Difference]: Without dead ends: 190 [2022-03-01 17:18:45,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:18:45,945 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:45,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 37 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-01 17:18:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133. [2022-03-01 17:18:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.772727272727273) internal successors, (366), 132 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 366 transitions. [2022-03-01 17:18:45,949 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 366 transitions. Word has length 16 [2022-03-01 17:18:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:45,949 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 366 transitions. [2022-03-01 17:18:45,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 366 transitions. [2022-03-01 17:18:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:45,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:45,950 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:45,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:46,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:46,150 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -156471534, now seen corresponding path program 18 times [2022-03-01 17:18:46,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:46,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569548343] [2022-03-01 17:18:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:46,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:46,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:46,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569548343] [2022-03-01 17:18:46,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569548343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:46,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718215671] [2022-03-01 17:18:46,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:18:46,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:46,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:46,200 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:46,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:18:46,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:18:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:46,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:46,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718215671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:46,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:46,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:46,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73162576] [2022-03-01 17:18:46,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:46,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:46,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:46,358 INFO L87 Difference]: Start difference. First operand 133 states and 366 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:46,645 INFO L93 Difference]: Finished difference Result 402 states and 774 transitions. [2022-03-01 17:18:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:18:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:46,647 INFO L225 Difference]: With dead ends: 402 [2022-03-01 17:18:46,647 INFO L226 Difference]: Without dead ends: 402 [2022-03-01 17:18:46,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=676, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:18:46,648 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 232 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:46,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 49 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-03-01 17:18:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 133. [2022-03-01 17:18:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.772727272727273) internal successors, (366), 132 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 366 transitions. [2022-03-01 17:18:46,652 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 366 transitions. Word has length 16 [2022-03-01 17:18:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:46,652 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 366 transitions. [2022-03-01 17:18:46,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 366 transitions. [2022-03-01 17:18:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:46,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:46,653 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:46,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:46,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:46,865 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1083298366, now seen corresponding path program 19 times [2022-03-01 17:18:46,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:46,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683437422] [2022-03-01 17:18:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:46,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:46,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:46,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683437422] [2022-03-01 17:18:46,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683437422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:46,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847583560] [2022-03-01 17:18:46,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:18:46,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:46,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:46,919 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:46,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:18:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:46,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:46,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:46,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:47,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847583560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:47,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:47,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:47,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232323961] [2022-03-01 17:18:47,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:47,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:47,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:47,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:47,060 INFO L87 Difference]: Start difference. First operand 133 states and 366 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:47,551 INFO L93 Difference]: Finished difference Result 407 states and 757 transitions. [2022-03-01 17:18:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:18:47,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:47,552 INFO L225 Difference]: With dead ends: 407 [2022-03-01 17:18:47,553 INFO L226 Difference]: Without dead ends: 401 [2022-03-01 17:18:47,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:18:47,554 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 229 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:47,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 49 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-03-01 17:18:47,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 133. [2022-03-01 17:18:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.75) internal successors, (363), 132 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 363 transitions. [2022-03-01 17:18:47,559 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 363 transitions. Word has length 16 [2022-03-01 17:18:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:47,560 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 363 transitions. [2022-03-01 17:18:47,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 363 transitions. [2022-03-01 17:18:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:47,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:47,560 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:47,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:47,773 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,SelfDestructingSolverStorable22 [2022-03-01 17:18:47,774 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash -420210288, now seen corresponding path program 20 times [2022-03-01 17:18:47,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:47,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15287562] [2022-03-01 17:18:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:47,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:47,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:47,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15287562] [2022-03-01 17:18:47,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15287562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:47,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913546157] [2022-03-01 17:18:47,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:18:47,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:47,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:47,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:47,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:18:47,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:18:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:47,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:47,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:47,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:47,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913546157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:47,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:47,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:47,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371037742] [2022-03-01 17:18:47,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:47,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:47,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:47,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:47,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:48,000 INFO L87 Difference]: Start difference. First operand 133 states and 363 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:48,123 INFO L93 Difference]: Finished difference Result 228 states and 500 transitions. [2022-03-01 17:18:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:18:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:48,124 INFO L225 Difference]: With dead ends: 228 [2022-03-01 17:18:48,124 INFO L226 Difference]: Without dead ends: 228 [2022-03-01 17:18:48,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=256, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:18:48,125 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 80 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:48,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 55 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-01 17:18:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 139. [2022-03-01 17:18:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.760869565217391) internal successors, (381), 138 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 381 transitions. [2022-03-01 17:18:48,129 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 381 transitions. Word has length 16 [2022-03-01 17:18:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:48,129 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 381 transitions. [2022-03-01 17:18:48,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 381 transitions. [2022-03-01 17:18:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:48,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:48,130 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:48,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:48,339 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,SelfDestructingSolverStorable23 [2022-03-01 17:18:48,339 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash 488713122, now seen corresponding path program 21 times [2022-03-01 17:18:48,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:48,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220697585] [2022-03-01 17:18:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:48,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:48,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:48,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220697585] [2022-03-01 17:18:48,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220697585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:48,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397705353] [2022-03-01 17:18:48,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:18:48,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:48,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:48,371 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:48,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:18:48,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:18:48,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:48,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:48,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:48,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397705353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:48,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:48,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:48,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184776851] [2022-03-01 17:18:48,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:48,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:48,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:48,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:48,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:48,538 INFO L87 Difference]: Start difference. First operand 139 states and 381 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:48,642 INFO L93 Difference]: Finished difference Result 229 states and 498 transitions. [2022-03-01 17:18:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:18:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:48,643 INFO L225 Difference]: With dead ends: 229 [2022-03-01 17:18:48,643 INFO L226 Difference]: Without dead ends: 228 [2022-03-01 17:18:48,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:18:48,644 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:48,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 55 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:48,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-01 17:18:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 139. [2022-03-01 17:18:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.753623188405797) internal successors, (380), 138 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 380 transitions. [2022-03-01 17:18:48,647 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 380 transitions. Word has length 16 [2022-03-01 17:18:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:48,647 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 380 transitions. [2022-03-01 17:18:48,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 380 transitions. [2022-03-01 17:18:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:48,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:48,648 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:48,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:48,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:48,859 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1354797074, now seen corresponding path program 22 times [2022-03-01 17:18:48,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:48,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284791354] [2022-03-01 17:18:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:48,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:48,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284791354] [2022-03-01 17:18:48,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284791354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:48,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647075868] [2022-03-01 17:18:48,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:18:48,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:48,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:48,903 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:48,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:18:48,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:18:48,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:48,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:48,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:49,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647075868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:49,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:49,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:49,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927305955] [2022-03-01 17:18:49,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:49,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:49,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:49,028 INFO L87 Difference]: Start difference. First operand 139 states and 380 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:49,206 INFO L93 Difference]: Finished difference Result 382 states and 735 transitions. [2022-03-01 17:18:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:18:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:49,216 INFO L225 Difference]: With dead ends: 382 [2022-03-01 17:18:49,216 INFO L226 Difference]: Without dead ends: 382 [2022-03-01 17:18:49,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=380, Invalid=550, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:18:49,219 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 264 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:49,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-01 17:18:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 139. [2022-03-01 17:18:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.753623188405797) internal successors, (380), 138 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 380 transitions. [2022-03-01 17:18:49,251 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 380 transitions. Word has length 16 [2022-03-01 17:18:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:49,252 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 380 transitions. [2022-03-01 17:18:49,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 380 transitions. [2022-03-01 17:18:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:49,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:49,254 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:49,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:49,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:49,471 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:49,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1344019776, now seen corresponding path program 23 times [2022-03-01 17:18:49,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:49,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505057168] [2022-03-01 17:18:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:49,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:49,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:49,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505057168] [2022-03-01 17:18:49,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505057168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:49,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478103029] [2022-03-01 17:18:49,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:18:49,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:49,524 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:49,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:18:49,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:18:49,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:49,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:49,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478103029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:49,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:49,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:49,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792137815] [2022-03-01 17:18:49,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:49,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:49,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:49,647 INFO L87 Difference]: Start difference. First operand 139 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:49,771 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2022-03-01 17:18:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:18:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:49,773 INFO L225 Difference]: With dead ends: 234 [2022-03-01 17:18:49,773 INFO L226 Difference]: Without dead ends: 232 [2022-03-01 17:18:49,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:18:49,776 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:49,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 57 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-01 17:18:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 139. [2022-03-01 17:18:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.746376811594203) internal successors, (379), 138 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 379 transitions. [2022-03-01 17:18:49,789 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 379 transitions. Word has length 16 [2022-03-01 17:18:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:49,789 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 379 transitions. [2022-03-01 17:18:49,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 379 transitions. [2022-03-01 17:18:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:49,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:49,789 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:49,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:50,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:18:50,005 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:50,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1229556914, now seen corresponding path program 24 times [2022-03-01 17:18:50,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:50,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149773024] [2022-03-01 17:18:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:50,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:50,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:50,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149773024] [2022-03-01 17:18:50,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149773024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:50,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735943657] [2022-03-01 17:18:50,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:18:50,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:50,050 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:50,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:18:50,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:18:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:50,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:50,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:50,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735943657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:50,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:50,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:50,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714575995] [2022-03-01 17:18:50,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:50,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:50,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:50,192 INFO L87 Difference]: Start difference. First operand 139 states and 379 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:50,495 INFO L93 Difference]: Finished difference Result 410 states and 772 transitions. [2022-03-01 17:18:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:18:50,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:50,496 INFO L225 Difference]: With dead ends: 410 [2022-03-01 17:18:50,497 INFO L226 Difference]: Without dead ends: 410 [2022-03-01 17:18:50,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=456, Invalid=734, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:18:50,498 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 212 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:50,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 83 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-01 17:18:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 139. [2022-03-01 17:18:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.746376811594203) internal successors, (379), 138 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 379 transitions. [2022-03-01 17:18:50,501 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 379 transitions. Word has length 16 [2022-03-01 17:18:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:50,502 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 379 transitions. [2022-03-01 17:18:50,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 379 transitions. [2022-03-01 17:18:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:50,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:50,502 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:50,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:50,715 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,SelfDestructingSolverStorable27 [2022-03-01 17:18:50,715 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2088722274, now seen corresponding path program 25 times [2022-03-01 17:18:50,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:50,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494017908] [2022-03-01 17:18:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:50,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:50,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:50,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494017908] [2022-03-01 17:18:50,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494017908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:50,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925096036] [2022-03-01 17:18:50,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:18:50,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:50,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:50,786 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:50,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:18:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:50,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:50,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:50,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925096036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:50,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:50,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:18:50,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434703165] [2022-03-01 17:18:50,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:50,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:50,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:50,945 INFO L87 Difference]: Start difference. First operand 139 states and 379 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:51,053 INFO L93 Difference]: Finished difference Result 189 states and 481 transitions. [2022-03-01 17:18:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:18:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:51,055 INFO L225 Difference]: With dead ends: 189 [2022-03-01 17:18:51,055 INFO L226 Difference]: Without dead ends: 186 [2022-03-01 17:18:51,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:18:51,055 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:51,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 15 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-01 17:18:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 139. [2022-03-01 17:18:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.739130434782609) internal successors, (378), 138 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 378 transitions. [2022-03-01 17:18:51,073 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 378 transitions. Word has length 16 [2022-03-01 17:18:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:51,073 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 378 transitions. [2022-03-01 17:18:51,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 378 transitions. [2022-03-01 17:18:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:51,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:51,074 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:51,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-01 17:18:51,274 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,SelfDestructingSolverStorable28 [2022-03-01 17:18:51,275 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash 259848082, now seen corresponding path program 26 times [2022-03-01 17:18:51,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:51,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399409134] [2022-03-01 17:18:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:51,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:51,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:51,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399409134] [2022-03-01 17:18:51,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399409134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:51,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925260875] [2022-03-01 17:18:51,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:18:51,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:51,328 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:51,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:18:51,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:51,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:18:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:51,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:51,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925260875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:51,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:51,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:18:51,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387445461] [2022-03-01 17:18:51,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:51,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:51,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:51,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:51,479 INFO L87 Difference]: Start difference. First operand 139 states and 378 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:51,747 INFO L93 Difference]: Finished difference Result 370 states and 745 transitions. [2022-03-01 17:18:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:18:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:51,749 INFO L225 Difference]: With dead ends: 370 [2022-03-01 17:18:51,749 INFO L226 Difference]: Without dead ends: 370 [2022-03-01 17:18:51,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=714, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:18:51,750 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 159 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:51,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 49 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-03-01 17:18:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 157. [2022-03-01 17:18:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.801282051282051) internal successors, (437), 156 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 437 transitions. [2022-03-01 17:18:51,754 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 437 transitions. Word has length 16 [2022-03-01 17:18:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:51,754 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 437 transitions. [2022-03-01 17:18:51,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 437 transitions. [2022-03-01 17:18:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:51,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:51,754 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:51,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:51,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:51,955 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:51,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:51,955 INFO L85 PathProgramCache]: Analyzing trace with hash 10793222, now seen corresponding path program 27 times [2022-03-01 17:18:51,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:51,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899437996] [2022-03-01 17:18:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:51,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:52,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:52,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899437996] [2022-03-01 17:18:52,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899437996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:52,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024945438] [2022-03-01 17:18:52,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:18:52,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:52,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:52,005 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:52,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:18:52,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:18:52,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:52,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:52,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:52,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024945438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:52,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:52,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:52,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078294029] [2022-03-01 17:18:52,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:52,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:52,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:52,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:52,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:52,148 INFO L87 Difference]: Start difference. First operand 157 states and 437 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:52,643 INFO L93 Difference]: Finished difference Result 434 states and 842 transitions. [2022-03-01 17:18:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:18:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:52,645 INFO L225 Difference]: With dead ends: 434 [2022-03-01 17:18:52,645 INFO L226 Difference]: Without dead ends: 428 [2022-03-01 17:18:52,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1854, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:18:52,646 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 215 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:52,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 55 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-01 17:18:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 157. [2022-03-01 17:18:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.7564102564102564) internal successors, (430), 156 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 430 transitions. [2022-03-01 17:18:52,650 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 430 transitions. Word has length 16 [2022-03-01 17:18:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:52,651 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 430 transitions. [2022-03-01 17:18:52,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 430 transitions. [2022-03-01 17:18:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:52,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:52,652 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:52,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:52,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:52,868 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 673881300, now seen corresponding path program 28 times [2022-03-01 17:18:52,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:52,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823315038] [2022-03-01 17:18:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:52,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:52,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823315038] [2022-03-01 17:18:52,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823315038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:52,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275066063] [2022-03-01 17:18:52,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:18:52,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:52,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:52,914 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:52,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:18:52,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:18:52,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:52,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:53,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275066063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:53,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:53,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:53,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278470122] [2022-03-01 17:18:53,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:53,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:53,066 INFO L87 Difference]: Start difference. First operand 157 states and 430 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:53,165 INFO L93 Difference]: Finished difference Result 257 states and 578 transitions. [2022-03-01 17:18:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:18:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:53,167 INFO L225 Difference]: With dead ends: 257 [2022-03-01 17:18:53,167 INFO L226 Difference]: Without dead ends: 257 [2022-03-01 17:18:53,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:18:53,167 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:53,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 69 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-01 17:18:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 163. [2022-03-01 17:18:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.771604938271605) internal successors, (449), 162 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 449 transitions. [2022-03-01 17:18:53,171 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 449 transitions. Word has length 16 [2022-03-01 17:18:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:53,171 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 449 transitions. [2022-03-01 17:18:53,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 449 transitions. [2022-03-01 17:18:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:53,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:53,172 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:53,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:53,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:53,372 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1582804710, now seen corresponding path program 29 times [2022-03-01 17:18:53,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:53,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458350621] [2022-03-01 17:18:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:53,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:53,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:53,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458350621] [2022-03-01 17:18:53,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458350621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:53,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694784877] [2022-03-01 17:18:53,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:18:53,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:53,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:53,441 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:53,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:18:53,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:18:53,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:53,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:53,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:53,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694784877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:53,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:53,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:53,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283300391] [2022-03-01 17:18:53,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:53,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:53,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:53,551 INFO L87 Difference]: Start difference. First operand 163 states and 449 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:53,647 INFO L93 Difference]: Finished difference Result 262 states and 582 transitions. [2022-03-01 17:18:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:18:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:53,648 INFO L225 Difference]: With dead ends: 262 [2022-03-01 17:18:53,648 INFO L226 Difference]: Without dead ends: 261 [2022-03-01 17:18:53,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:18:53,648 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 90 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:53,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 51 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-01 17:18:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 163. [2022-03-01 17:18:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.759259259259259) internal successors, (447), 162 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 447 transitions. [2022-03-01 17:18:53,663 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 447 transitions. Word has length 16 [2022-03-01 17:18:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:53,664 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 447 transitions. [2022-03-01 17:18:53,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 447 transitions. [2022-03-01 17:18:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:53,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:53,664 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:53,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:53,879 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,SelfDestructingSolverStorable32 [2022-03-01 17:18:53,879 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1846078634, now seen corresponding path program 30 times [2022-03-01 17:18:53,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:53,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726853482] [2022-03-01 17:18:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:53,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:53,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726853482] [2022-03-01 17:18:53,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726853482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:53,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496893784] [2022-03-01 17:18:53,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:18:53,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:53,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:53,940 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:53,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:18:53,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:18:53,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:53,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:53,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:53,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:54,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496893784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:54,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:54,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:54,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722898791] [2022-03-01 17:18:54,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:54,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:54,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:54,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:54,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:54,085 INFO L87 Difference]: Start difference. First operand 163 states and 447 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:54,320 INFO L93 Difference]: Finished difference Result 402 states and 810 transitions. [2022-03-01 17:18:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:18:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:54,322 INFO L225 Difference]: With dead ends: 402 [2022-03-01 17:18:54,322 INFO L226 Difference]: Without dead ends: 402 [2022-03-01 17:18:54,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=560, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:18:54,323 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 248 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:54,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 49 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-03-01 17:18:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 163. [2022-03-01 17:18:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.759259259259259) internal successors, (447), 162 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 447 transitions. [2022-03-01 17:18:54,326 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 447 transitions. Word has length 16 [2022-03-01 17:18:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:54,326 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 447 transitions. [2022-03-01 17:18:54,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 447 transitions. [2022-03-01 17:18:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:54,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:54,327 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:54,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 17:18:54,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:54,535 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1856855932, now seen corresponding path program 31 times [2022-03-01 17:18:54,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:54,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013968770] [2022-03-01 17:18:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:54,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:54,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:54,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013968770] [2022-03-01 17:18:54,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013968770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:54,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817868062] [2022-03-01 17:18:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:18:54,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:54,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:54,579 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:54,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:18:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:54,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:54,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817868062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:54,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:54,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:54,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010896761] [2022-03-01 17:18:54,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:54,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:54,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:54,715 INFO L87 Difference]: Start difference. First operand 163 states and 447 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:54,853 INFO L93 Difference]: Finished difference Result 267 states and 587 transitions. [2022-03-01 17:18:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:18:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:54,854 INFO L225 Difference]: With dead ends: 267 [2022-03-01 17:18:54,854 INFO L226 Difference]: Without dead ends: 265 [2022-03-01 17:18:54,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:18:54,855 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:54,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 49 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-01 17:18:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2022-03-01 17:18:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.753086419753086) internal successors, (446), 162 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 446 transitions. [2022-03-01 17:18:54,858 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 446 transitions. Word has length 16 [2022-03-01 17:18:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:54,858 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 446 transitions. [2022-03-01 17:18:54,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 446 transitions. [2022-03-01 17:18:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:54,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:54,858 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:54,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-01 17:18:55,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:55,067 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash -135465326, now seen corresponding path program 32 times [2022-03-01 17:18:55,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:55,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358379307] [2022-03-01 17:18:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:55,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:55,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358379307] [2022-03-01 17:18:55,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358379307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:55,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257830693] [2022-03-01 17:18:55,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:18:55,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:55,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:55,114 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:55,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:18:55,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:18:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:55,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:55,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:55,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257830693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:55,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:55,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:18:55,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333033681] [2022-03-01 17:18:55,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:55,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:18:55,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:18:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:55,255 INFO L87 Difference]: Start difference. First operand 163 states and 446 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:55,578 INFO L93 Difference]: Finished difference Result 426 states and 839 transitions. [2022-03-01 17:18:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:18:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:55,580 INFO L225 Difference]: With dead ends: 426 [2022-03-01 17:18:55,580 INFO L226 Difference]: Without dead ends: 426 [2022-03-01 17:18:55,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=830, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:18:55,581 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 246 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:55,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 79 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-01 17:18:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 163. [2022-03-01 17:18:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.753086419753086) internal successors, (446), 162 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 446 transitions. [2022-03-01 17:18:55,584 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 446 transitions. Word has length 16 [2022-03-01 17:18:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:55,584 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 446 transitions. [2022-03-01 17:18:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 446 transitions. [2022-03-01 17:18:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:55,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:55,585 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:55,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:55,795 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,SelfDestructingSolverStorable35 [2022-03-01 17:18:55,796 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1112153434, now seen corresponding path program 33 times [2022-03-01 17:18:55,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:55,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534785192] [2022-03-01 17:18:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:55,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:55,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:55,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534785192] [2022-03-01 17:18:55,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534785192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:55,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446124559] [2022-03-01 17:18:55,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:18:55,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:55,839 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:55,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:18:55,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:18:55,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:55,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:55,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446124559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:55,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:55,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:18:55,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133465192] [2022-03-01 17:18:55,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:55,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:55,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:55,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:55,969 INFO L87 Difference]: Start difference. First operand 163 states and 446 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:56,107 INFO L93 Difference]: Finished difference Result 220 states and 548 transitions. [2022-03-01 17:18:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:18:56,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:56,108 INFO L225 Difference]: With dead ends: 220 [2022-03-01 17:18:56,108 INFO L226 Difference]: Without dead ends: 217 [2022-03-01 17:18:56,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:18:56,109 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:56,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-01 17:18:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 163. [2022-03-01 17:18:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.746913580246914) internal successors, (445), 162 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 445 transitions. [2022-03-01 17:18:56,112 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 445 transitions. Word has length 16 [2022-03-01 17:18:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:56,112 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 445 transitions. [2022-03-01 17:18:56,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 445 transitions. [2022-03-01 17:18:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:56,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:56,112 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:56,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:56,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 17:18:56,324 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1353939670, now seen corresponding path program 34 times [2022-03-01 17:18:56,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:56,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355729746] [2022-03-01 17:18:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:56,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:56,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:56,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355729746] [2022-03-01 17:18:56,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355729746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:56,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394886827] [2022-03-01 17:18:56,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:18:56,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:56,369 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:56,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:18:56,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:18:56,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:56,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:56,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394886827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:56,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:56,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:18:56,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492702219] [2022-03-01 17:18:56,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:56,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:56,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:56,496 INFO L87 Difference]: Start difference. First operand 163 states and 445 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:56,766 INFO L93 Difference]: Finished difference Result 346 states and 687 transitions. [2022-03-01 17:18:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:18:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:18:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:56,768 INFO L225 Difference]: With dead ends: 346 [2022-03-01 17:18:56,768 INFO L226 Difference]: Without dead ends: 346 [2022-03-01 17:18:56,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=735, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:18:56,769 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:56,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 77 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-03-01 17:18:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 163. [2022-03-01 17:18:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.746913580246914) internal successors, (445), 162 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 445 transitions. [2022-03-01 17:18:56,772 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 445 transitions. Word has length 16 [2022-03-01 17:18:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:56,772 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 445 transitions. [2022-03-01 17:18:56,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 445 transitions. [2022-03-01 17:18:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:56,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:56,773 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:56,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:56,980 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,SelfDestructingSolverStorable37 [2022-03-01 17:18:56,980 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:56,980 INFO L85 PathProgramCache]: Analyzing trace with hash 498787524, now seen corresponding path program 35 times [2022-03-01 17:18:56,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:56,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611496186] [2022-03-01 17:18:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:57,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:57,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611496186] [2022-03-01 17:18:57,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611496186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:57,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819568794] [2022-03-01 17:18:57,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:18:57,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:57,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:57,072 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:57,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:18:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:57,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:18:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:57,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:57,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819568794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:57,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:57,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:18:57,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081894990] [2022-03-01 17:18:57,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:57,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:18:57,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:18:57,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:18:57,200 INFO L87 Difference]: Start difference. First operand 163 states and 445 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:18:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:57,315 INFO L93 Difference]: Finished difference Result 209 states and 535 transitions. [2022-03-01 17:18:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:18:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 16 [2022-03-01 17:18:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:57,316 INFO L225 Difference]: With dead ends: 209 [2022-03-01 17:18:57,316 INFO L226 Difference]: Without dead ends: 205 [2022-03-01 17:18:57,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:18:57,317 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:57,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 17 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-01 17:18:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2022-03-01 17:18:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.740740740740741) internal successors, (444), 162 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 444 transitions. [2022-03-01 17:18:57,320 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 444 transitions. Word has length 16 [2022-03-01 17:18:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:57,320 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 444 transitions. [2022-03-01 17:18:57,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:18:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 444 transitions. [2022-03-01 17:18:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:57,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:57,320 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:57,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:57,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 17:18:57,521 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 280854290, now seen corresponding path program 36 times [2022-03-01 17:18:57,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:57,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595045651] [2022-03-01 17:18:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:57,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:57,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:57,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595045651] [2022-03-01 17:18:57,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595045651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:57,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932760584] [2022-03-01 17:18:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:18:57,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:57,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:57,592 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:57,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:18:57,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:18:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:57,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:57,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:57,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932760584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:57,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:57,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:18:57,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681438631] [2022-03-01 17:18:57,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:57,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:18:57,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:18:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:18:57,719 INFO L87 Difference]: Start difference. First operand 163 states and 444 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:18:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:58,014 INFO L93 Difference]: Finished difference Result 316 states and 677 transitions. [2022-03-01 17:18:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:18:58,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 16 [2022-03-01 17:18:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:58,016 INFO L225 Difference]: With dead ends: 316 [2022-03-01 17:18:58,016 INFO L226 Difference]: Without dead ends: 316 [2022-03-01 17:18:58,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:18:58,016 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 113 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:58,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 45 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-03-01 17:18:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 172. [2022-03-01 17:18:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.7719298245614037) internal successors, (474), 171 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 474 transitions. [2022-03-01 17:18:58,021 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 474 transitions. Word has length 16 [2022-03-01 17:18:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:58,021 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 474 transitions. [2022-03-01 17:18:58,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:18:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 474 transitions. [2022-03-01 17:18:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:58,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:58,022 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:58,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:58,237 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,SelfDestructingSolverStorable39 [2022-03-01 17:18:58,238 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash -432105918, now seen corresponding path program 37 times [2022-03-01 17:18:58,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:58,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077922247] [2022-03-01 17:18:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:58,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:58,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077922247] [2022-03-01 17:18:58,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077922247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:58,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549330647] [2022-03-01 17:18:58,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:18:58,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:58,276 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:58,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:18:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:58,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:58,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:58,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:58,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549330647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:58,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:58,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:58,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651301502] [2022-03-01 17:18:58,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:58,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:58,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:58,396 INFO L87 Difference]: Start difference. First operand 172 states and 474 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:58,834 INFO L93 Difference]: Finished difference Result 434 states and 848 transitions. [2022-03-01 17:18:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:18:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:58,836 INFO L225 Difference]: With dead ends: 434 [2022-03-01 17:18:58,836 INFO L226 Difference]: Without dead ends: 428 [2022-03-01 17:18:58,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=894, Invalid=1862, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:18:58,837 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 241 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:58,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 49 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-01 17:18:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 172. [2022-03-01 17:18:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.719298245614035) internal successors, (465), 171 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 465 transitions. [2022-03-01 17:18:58,841 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 465 transitions. Word has length 16 [2022-03-01 17:18:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:58,842 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 465 transitions. [2022-03-01 17:18:58,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 465 transitions. [2022-03-01 17:18:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:58,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:58,842 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:58,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-01 17:18:59,059 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,SelfDestructingSolverStorable40 [2022-03-01 17:18:59,059 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash 230982160, now seen corresponding path program 38 times [2022-03-01 17:18:59,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:59,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558501168] [2022-03-01 17:18:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:59,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:59,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558501168] [2022-03-01 17:18:59,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558501168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:59,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793839444] [2022-03-01 17:18:59,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:18:59,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:59,104 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:59,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:18:59,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:18:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:59,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:59,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:18:59,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793839444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:59,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:59,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:59,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566564350] [2022-03-01 17:18:59,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:59,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:59,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:59,226 INFO L87 Difference]: Start difference. First operand 172 states and 465 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:59,279 INFO L93 Difference]: Finished difference Result 269 states and 616 transitions. [2022-03-01 17:18:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:18:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:59,280 INFO L225 Difference]: With dead ends: 269 [2022-03-01 17:18:59,280 INFO L226 Difference]: Without dead ends: 269 [2022-03-01 17:18:59,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:18:59,281 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 101 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:59,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 41 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:18:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-01 17:18:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 178. [2022-03-01 17:18:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.751412429378531) internal successors, (487), 177 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 487 transitions. [2022-03-01 17:18:59,284 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 487 transitions. Word has length 16 [2022-03-01 17:18:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:59,284 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 487 transitions. [2022-03-01 17:18:59,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 487 transitions. [2022-03-01 17:18:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:59,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:59,285 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:59,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:18:59,498 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,SelfDestructingSolverStorable41 [2022-03-01 17:18:59,499 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:18:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:18:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1139905570, now seen corresponding path program 39 times [2022-03-01 17:18:59,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:18:59,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171875799] [2022-03-01 17:18:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:18:59,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:18:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:18:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:59,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:18:59,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171875799] [2022-03-01 17:18:59,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171875799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:18:59,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786424356] [2022-03-01 17:18:59,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:18:59,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:18:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:18:59,547 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:18:59,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:18:59,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:18:59,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:18:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:18:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:18:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:59,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:18:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:18:59,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786424356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:18:59,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:18:59,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:18:59,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199089337] [2022-03-01 17:18:59,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:18:59,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:18:59,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:18:59,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:18:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:18:59,707 INFO L87 Difference]: Start difference. First operand 178 states and 487 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:18:59,839 INFO L93 Difference]: Finished difference Result 278 states and 626 transitions. [2022-03-01 17:18:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:18:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:18:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:18:59,840 INFO L225 Difference]: With dead ends: 278 [2022-03-01 17:18:59,840 INFO L226 Difference]: Without dead ends: 277 [2022-03-01 17:18:59,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:18:59,841 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:18:59,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 37 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:18:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-01 17:18:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 178. [2022-03-01 17:18:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.7401129943502824) internal successors, (485), 177 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:18:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 485 transitions. [2022-03-01 17:18:59,844 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 485 transitions. Word has length 16 [2022-03-01 17:18:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:18:59,844 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 485 transitions. [2022-03-01 17:18:59,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:18:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 485 transitions. [2022-03-01 17:18:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:18:59,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:18:59,845 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:18:59,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:00,045 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,SelfDestructingSolverStorable42 [2022-03-01 17:19:00,046 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:00,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2005989522, now seen corresponding path program 40 times [2022-03-01 17:19:00,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:00,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019126759] [2022-03-01 17:19:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:00,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:00,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019126759] [2022-03-01 17:19:00,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019126759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:00,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344524250] [2022-03-01 17:19:00,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:19:00,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:00,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:00,098 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:00,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:19:00,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:19:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:00,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:00,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344524250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:00,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:00,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:19:00,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991238007] [2022-03-01 17:19:00,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:00,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:00,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:00,235 INFO L87 Difference]: Start difference. First operand 178 states and 485 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:00,468 INFO L93 Difference]: Finished difference Result 398 states and 811 transitions. [2022-03-01 17:19:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:19:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:19:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:00,469 INFO L225 Difference]: With dead ends: 398 [2022-03-01 17:19:00,469 INFO L226 Difference]: Without dead ends: 398 [2022-03-01 17:19:00,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:19:00,470 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 256 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:00,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 49 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-01 17:19:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 177. [2022-03-01 17:19:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.7329545454545454) internal successors, (481), 176 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 481 transitions. [2022-03-01 17:19:00,474 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 481 transitions. Word has length 16 [2022-03-01 17:19:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:00,474 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 481 transitions. [2022-03-01 17:19:00,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 481 transitions. [2022-03-01 17:19:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:00,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:00,474 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:00,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:00,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:00,675 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1995212224, now seen corresponding path program 41 times [2022-03-01 17:19:00,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:00,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492825554] [2022-03-01 17:19:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:00,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:00,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:00,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492825554] [2022-03-01 17:19:00,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492825554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:00,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597729376] [2022-03-01 17:19:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:19:00,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:00,732 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:00,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:19:00,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:19:00,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:00,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:00,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:00,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597729376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:00,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:00,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:19:00,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775373117] [2022-03-01 17:19:00,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:00,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:19:00,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:19:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:19:00,881 INFO L87 Difference]: Start difference. First operand 177 states and 481 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:01,019 INFO L93 Difference]: Finished difference Result 282 states and 627 transitions. [2022-03-01 17:19:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:19:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:01,020 INFO L225 Difference]: With dead ends: 282 [2022-03-01 17:19:01,020 INFO L226 Difference]: Without dead ends: 280 [2022-03-01 17:19:01,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:19:01,021 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 105 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:01,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 43 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-01 17:19:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 177. [2022-03-01 17:19:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.727272727272727) internal successors, (480), 176 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 480 transitions. [2022-03-01 17:19:01,024 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 480 transitions. Word has length 16 [2022-03-01 17:19:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:01,024 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 480 transitions. [2022-03-01 17:19:01,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 480 transitions. [2022-03-01 17:19:01,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:01,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:01,025 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:01,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:01,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:01,235 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:01,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -578364466, now seen corresponding path program 42 times [2022-03-01 17:19:01,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:01,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814626807] [2022-03-01 17:19:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:01,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:01,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814626807] [2022-03-01 17:19:01,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814626807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:01,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047911223] [2022-03-01 17:19:01,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:19:01,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:01,279 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:19:01,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:19:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:01,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:01,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:01,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047911223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:01,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:01,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:19:01,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835387269] [2022-03-01 17:19:01,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:01,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:19:01,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:19:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:19:01,440 INFO L87 Difference]: Start difference. First operand 177 states and 480 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:01,744 INFO L93 Difference]: Finished difference Result 425 states and 837 transitions. [2022-03-01 17:19:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:19:01,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:01,746 INFO L225 Difference]: With dead ends: 425 [2022-03-01 17:19:01,746 INFO L226 Difference]: Without dead ends: 425 [2022-03-01 17:19:01,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=546, Invalid=936, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:19:01,747 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 214 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:01,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 69 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-01 17:19:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 175. [2022-03-01 17:19:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.718390804597701) internal successors, (473), 174 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 473 transitions. [2022-03-01 17:19:01,751 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 473 transitions. Word has length 16 [2022-03-01 17:19:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:01,751 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 473 transitions. [2022-03-01 17:19:01,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 473 transitions. [2022-03-01 17:19:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:01,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:01,752 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:01,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:01,965 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,SelfDestructingSolverStorable45 [2022-03-01 17:19:01,965 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1555052574, now seen corresponding path program 43 times [2022-03-01 17:19:01,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:01,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723551725] [2022-03-01 17:19:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:01,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:02,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:02,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723551725] [2022-03-01 17:19:02,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723551725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:02,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051336364] [2022-03-01 17:19:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:19:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:02,015 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:02,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:19:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:02,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:02,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051336364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:02,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:02,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:19:02,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816131446] [2022-03-01 17:19:02,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:02,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:02,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:02,152 INFO L87 Difference]: Start difference. First operand 175 states and 473 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:02,273 INFO L93 Difference]: Finished difference Result 235 states and 581 transitions. [2022-03-01 17:19:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:19:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:02,274 INFO L225 Difference]: With dead ends: 235 [2022-03-01 17:19:02,274 INFO L226 Difference]: Without dead ends: 232 [2022-03-01 17:19:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:19:02,275 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 86 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:02,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 25 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-01 17:19:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2022-03-01 17:19:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.7126436781609193) internal successors, (472), 174 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 472 transitions. [2022-03-01 17:19:02,278 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 472 transitions. Word has length 16 [2022-03-01 17:19:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:02,278 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 472 transitions. [2022-03-01 17:19:02,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 472 transitions. [2022-03-01 17:19:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:02,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:02,279 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:02,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 17:19:02,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 17:19:02,479 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash 911040530, now seen corresponding path program 44 times [2022-03-01 17:19:02,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:02,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095770619] [2022-03-01 17:19:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:02,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:02,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095770619] [2022-03-01 17:19:02,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095770619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:02,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214103328] [2022-03-01 17:19:02,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:19:02,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:02,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:02,526 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:02,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:19:02,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:02,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:02,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:02,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:19:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:02,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:02,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214103328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:02,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:02,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:19:02,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830054417] [2022-03-01 17:19:02,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:02,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:02,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:02,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:02,671 INFO L87 Difference]: Start difference. First operand 175 states and 472 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:02,996 INFO L93 Difference]: Finished difference Result 345 states and 709 transitions. [2022-03-01 17:19:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:19:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:02,998 INFO L225 Difference]: With dead ends: 345 [2022-03-01 17:19:02,998 INFO L226 Difference]: Without dead ends: 345 [2022-03-01 17:19:02,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:19:02,999 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 153 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:02,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 63 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-01 17:19:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 175. [2022-03-01 17:19:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.7126436781609193) internal successors, (472), 174 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 472 transitions. [2022-03-01 17:19:03,004 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 472 transitions. Word has length 16 [2022-03-01 17:19:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:03,004 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 472 transitions. [2022-03-01 17:19:03,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 472 transitions. [2022-03-01 17:19:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:03,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:03,005 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:03,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 17:19:03,215 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,SelfDestructingSolverStorable47 [2022-03-01 17:19:03,215 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 55888384, now seen corresponding path program 45 times [2022-03-01 17:19:03,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:03,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801004593] [2022-03-01 17:19:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:03,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:03,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801004593] [2022-03-01 17:19:03,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801004593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:03,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122623635] [2022-03-01 17:19:03,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:19:03,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:03,259 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:03,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:19:03,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:19:03,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:03,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:03,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:03,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:03,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122623635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:03,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:03,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:19:03,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372213910] [2022-03-01 17:19:03,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:03,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:19:03,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:19:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:19:03,414 INFO L87 Difference]: Start difference. First operand 175 states and 472 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:03,517 INFO L93 Difference]: Finished difference Result 234 states and 578 transitions. [2022-03-01 17:19:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:19:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 16 [2022-03-01 17:19:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:03,518 INFO L225 Difference]: With dead ends: 234 [2022-03-01 17:19:03,518 INFO L226 Difference]: Without dead ends: 230 [2022-03-01 17:19:03,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:19:03,518 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:03,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 31 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-01 17:19:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2022-03-01 17:19:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.706896551724138) internal successors, (471), 174 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 471 transitions. [2022-03-01 17:19:03,521 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 471 transitions. Word has length 16 [2022-03-01 17:19:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:03,521 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 471 transitions. [2022-03-01 17:19:03,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 471 transitions. [2022-03-01 17:19:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:03,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:03,522 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:03,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 17:19:03,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:03,727 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -162044850, now seen corresponding path program 46 times [2022-03-01 17:19:03,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:03,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12248290] [2022-03-01 17:19:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:03,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:03,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12248290] [2022-03-01 17:19:03,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12248290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:03,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303253572] [2022-03-01 17:19:03,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:19:03,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:03,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:03,776 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:03,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:19:03,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:19:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:03,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:03,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:03,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303253572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:03,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:03,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:19:03,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224359056] [2022-03-01 17:19:03,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:03,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:19:03,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:19:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:19:03,904 INFO L87 Difference]: Start difference. First operand 175 states and 471 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:04,214 INFO L93 Difference]: Finished difference Result 288 states and 620 transitions. [2022-03-01 17:19:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:19:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 16 [2022-03-01 17:19:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:04,216 INFO L225 Difference]: With dead ends: 288 [2022-03-01 17:19:04,216 INFO L226 Difference]: Without dead ends: 288 [2022-03-01 17:19:04,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:19:04,216 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 70 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:04,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-01 17:19:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 175. [2022-03-01 17:19:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.706896551724138) internal successors, (471), 174 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 471 transitions. [2022-03-01 17:19:04,221 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 471 transitions. Word has length 16 [2022-03-01 17:19:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:04,221 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 471 transitions. [2022-03-01 17:19:04,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 471 transitions. [2022-03-01 17:19:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:04,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:04,221 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:04,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:04,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 17:19:04,430 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1544549470, now seen corresponding path program 47 times [2022-03-01 17:19:04,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:04,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019327536] [2022-03-01 17:19:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:04,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:04,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019327536] [2022-03-01 17:19:04,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019327536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:04,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445728404] [2022-03-01 17:19:04,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:19:04,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:04,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:04,480 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:04,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:19:04,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:19:04,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:04,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:04,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445728404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:04,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:04,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:19:04,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988706694] [2022-03-01 17:19:04,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:04,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:19:04,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:19:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:19:04,612 INFO L87 Difference]: Start difference. First operand 175 states and 471 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:04,715 INFO L93 Difference]: Finished difference Result 222 states and 564 transitions. [2022-03-01 17:19:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:19:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:04,717 INFO L225 Difference]: With dead ends: 222 [2022-03-01 17:19:04,717 INFO L226 Difference]: Without dead ends: 217 [2022-03-01 17:19:04,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:19:04,719 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:04,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 15 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-01 17:19:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2022-03-01 17:19:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.7011494252873565) internal successors, (470), 174 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 470 transitions. [2022-03-01 17:19:04,722 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 470 transitions. Word has length 16 [2022-03-01 17:19:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:04,722 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 470 transitions. [2022-03-01 17:19:04,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 470 transitions. [2022-03-01 17:19:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:04,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:04,723 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:04,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 17:19:04,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:04,939 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash 932046738, now seen corresponding path program 48 times [2022-03-01 17:19:04,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:04,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345750063] [2022-03-01 17:19:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:04,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:04,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:04,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345750063] [2022-03-01 17:19:04,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345750063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:04,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415786754] [2022-03-01 17:19:04,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:19:04,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:04,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:04,981 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:04,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:19:04,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:19:04,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:04,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:05,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:05,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415786754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:05,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:05,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:19:05,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207113949] [2022-03-01 17:19:05,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:05,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:19:05,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:19:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:19:05,076 INFO L87 Difference]: Start difference. First operand 175 states and 470 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:05,337 INFO L93 Difference]: Finished difference Result 292 states and 663 transitions. [2022-03-01 17:19:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:19:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:05,338 INFO L225 Difference]: With dead ends: 292 [2022-03-01 17:19:05,338 INFO L226 Difference]: Without dead ends: 292 [2022-03-01 17:19:05,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:19:05,340 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:05,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 39 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-01 17:19:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 181. [2022-03-01 17:19:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.7111111111111112) internal successors, (488), 180 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 488 transitions. [2022-03-01 17:19:05,343 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 488 transitions. Word has length 16 [2022-03-01 17:19:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:05,343 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 488 transitions. [2022-03-01 17:19:05,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 488 transitions. [2022-03-01 17:19:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:05,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:05,344 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:05,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:05,559 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,SelfDestructingSolverStorable51 [2022-03-01 17:19:05,559 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1277077370, now seen corresponding path program 49 times [2022-03-01 17:19:05,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:05,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282028215] [2022-03-01 17:19:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:05,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:05,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282028215] [2022-03-01 17:19:05,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282028215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:05,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951321084] [2022-03-01 17:19:05,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:19:05,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:05,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:05,600 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:05,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:19:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:05,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:05,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:05,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:05,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951321084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:05,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:05,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:19:05,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423602629] [2022-03-01 17:19:05,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:05,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:05,742 INFO L87 Difference]: Start difference. First operand 181 states and 488 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:06,195 INFO L93 Difference]: Finished difference Result 438 states and 890 transitions. [2022-03-01 17:19:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:19:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:19:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:06,197 INFO L225 Difference]: With dead ends: 438 [2022-03-01 17:19:06,197 INFO L226 Difference]: Without dead ends: 434 [2022-03-01 17:19:06,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=886, Invalid=1870, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:19:06,203 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 202 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:06,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 51 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-01 17:19:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 188. [2022-03-01 17:19:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.7433155080213902) internal successors, (513), 187 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 513 transitions. [2022-03-01 17:19:06,223 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 513 transitions. Word has length 16 [2022-03-01 17:19:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:06,223 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 513 transitions. [2022-03-01 17:19:06,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 513 transitions. [2022-03-01 17:19:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:06,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:06,224 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:06,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:06,424 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,SelfDestructingSolverStorable52 [2022-03-01 17:19:06,425 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash -613989292, now seen corresponding path program 50 times [2022-03-01 17:19:06,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:06,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698808359] [2022-03-01 17:19:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:06,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:06,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698808359] [2022-03-01 17:19:06,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698808359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:06,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926395315] [2022-03-01 17:19:06,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:19:06,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:06,458 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:06,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:19:06,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:19:06,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:06,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:06,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:06,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:06,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926395315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:06,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:06,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:19:06,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377990600] [2022-03-01 17:19:06,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:06,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:06,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:06,559 INFO L87 Difference]: Start difference. First operand 188 states and 513 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:06,624 INFO L93 Difference]: Finished difference Result 302 states and 698 transitions. [2022-03-01 17:19:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:19:06,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:19:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:06,626 INFO L225 Difference]: With dead ends: 302 [2022-03-01 17:19:06,626 INFO L226 Difference]: Without dead ends: 302 [2022-03-01 17:19:06,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:19:06,639 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 99 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:06,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 47 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-01 17:19:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 195. [2022-03-01 17:19:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.783505154639175) internal successors, (540), 194 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 540 transitions. [2022-03-01 17:19:06,656 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 540 transitions. Word has length 16 [2022-03-01 17:19:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:06,656 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 540 transitions. [2022-03-01 17:19:06,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 540 transitions. [2022-03-01 17:19:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:06,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:06,657 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:06,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:06,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:06,873 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:06,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:06,874 INFO L85 PathProgramCache]: Analyzing trace with hash 294934118, now seen corresponding path program 51 times [2022-03-01 17:19:06,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:06,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892083409] [2022-03-01 17:19:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:06,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:06,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:06,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892083409] [2022-03-01 17:19:06,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892083409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:06,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589476943] [2022-03-01 17:19:06,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:19:06,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:06,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:06,937 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:06,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:19:06,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:19:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:19:06,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:19:07,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589476943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:07,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:07,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:19:07,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188821451] [2022-03-01 17:19:07,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:07,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:07,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:07,084 INFO L87 Difference]: Start difference. First operand 195 states and 540 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:07,211 INFO L93 Difference]: Finished difference Result 300 states and 688 transitions. [2022-03-01 17:19:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:19:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:19:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:07,212 INFO L225 Difference]: With dead ends: 300 [2022-03-01 17:19:07,212 INFO L226 Difference]: Without dead ends: 299 [2022-03-01 17:19:07,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:19:07,213 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:07,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 33 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-01 17:19:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 195. [2022-03-01 17:19:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.7783505154639174) internal successors, (539), 194 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 539 transitions. [2022-03-01 17:19:07,216 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 539 transitions. Word has length 16 [2022-03-01 17:19:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:07,216 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 539 transitions. [2022-03-01 17:19:07,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 539 transitions. [2022-03-01 17:19:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:07,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:07,216 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:07,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:07,431 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,SelfDestructingSolverStorable54 [2022-03-01 17:19:07,431 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1161018070, now seen corresponding path program 52 times [2022-03-01 17:19:07,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:07,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096294308] [2022-03-01 17:19:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:07,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:07,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:07,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096294308] [2022-03-01 17:19:07,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096294308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:07,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927431814] [2022-03-01 17:19:07,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:19:07,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:07,477 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:07,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:19:07,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:19:07,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:19:07,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:19:07,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927431814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:07,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:07,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:19:07,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916003445] [2022-03-01 17:19:07,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:07,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:07,644 INFO L87 Difference]: Start difference. First operand 195 states and 539 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:07,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:07,831 INFO L93 Difference]: Finished difference Result 410 states and 863 transitions. [2022-03-01 17:19:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:19:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 16 [2022-03-01 17:19:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:07,832 INFO L225 Difference]: With dead ends: 410 [2022-03-01 17:19:07,832 INFO L226 Difference]: Without dead ends: 409 [2022-03-01 17:19:07,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=368, Invalid=624, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:19:07,833 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 235 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:07,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 37 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-03-01 17:19:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 197. [2022-03-01 17:19:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.7091836734693877) internal successors, (531), 196 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 531 transitions. [2022-03-01 17:19:07,837 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 531 transitions. Word has length 16 [2022-03-01 17:19:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:07,837 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 531 transitions. [2022-03-01 17:19:07,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-03-01 17:19:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 531 transitions. [2022-03-01 17:19:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:07,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:07,837 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:07,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:08,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 17:19:08,047 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:08,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1150240772, now seen corresponding path program 53 times [2022-03-01 17:19:08,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:08,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063100474] [2022-03-01 17:19:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:08,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:08,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:08,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063100474] [2022-03-01 17:19:08,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063100474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:08,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856216411] [2022-03-01 17:19:08,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:19:08,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:08,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:08,090 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:08,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:19:08,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:19:08,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:08,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:08,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:08,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856216411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:08,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:08,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:19:08,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409019484] [2022-03-01 17:19:08,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:08,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:19:08,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:08,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:19:08,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:19:08,228 INFO L87 Difference]: Start difference. First operand 197 states and 531 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:08,381 INFO L93 Difference]: Finished difference Result 302 states and 677 transitions. [2022-03-01 17:19:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:19:08,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:08,382 INFO L225 Difference]: With dead ends: 302 [2022-03-01 17:19:08,383 INFO L226 Difference]: Without dead ends: 300 [2022-03-01 17:19:08,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:19:08,383 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 81 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:08,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 45 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-03-01 17:19:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 197. [2022-03-01 17:19:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.704081632653061) internal successors, (530), 196 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 530 transitions. [2022-03-01 17:19:08,405 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 530 transitions. Word has length 16 [2022-03-01 17:19:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:08,405 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 530 transitions. [2022-03-01 17:19:08,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 530 transitions. [2022-03-01 17:19:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:08,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:08,405 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:08,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:08,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:08,606 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1423335918, now seen corresponding path program 54 times [2022-03-01 17:19:08,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:08,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27434732] [2022-03-01 17:19:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:08,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:08,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27434732] [2022-03-01 17:19:08,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27434732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:08,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328455709] [2022-03-01 17:19:08,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:19:08,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:08,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:08,652 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:08,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:19:08,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:19:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:08,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:08,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328455709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:08,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:08,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:19:08,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023439588] [2022-03-01 17:19:08,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:19:08,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:19:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:19:08,794 INFO L87 Difference]: Start difference. First operand 197 states and 530 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:09,140 INFO L93 Difference]: Finished difference Result 443 states and 893 transitions. [2022-03-01 17:19:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:19:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:09,142 INFO L225 Difference]: With dead ends: 443 [2022-03-01 17:19:09,142 INFO L226 Difference]: Without dead ends: 443 [2022-03-01 17:19:09,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=615, Invalid=1107, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:19:09,144 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:09,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 85 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-01 17:19:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 195. [2022-03-01 17:19:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.695876288659794) internal successors, (523), 194 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 523 transitions. [2022-03-01 17:19:09,148 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 523 transitions. Word has length 16 [2022-03-01 17:19:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:09,148 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 523 transitions. [2022-03-01 17:19:09,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 523 transitions. [2022-03-01 17:19:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:09,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:09,149 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:09,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 17:19:09,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:09,365 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1894943270, now seen corresponding path program 55 times [2022-03-01 17:19:09,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:09,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248235678] [2022-03-01 17:19:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:09,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:09,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:09,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248235678] [2022-03-01 17:19:09,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248235678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:09,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813756109] [2022-03-01 17:19:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:19:09,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:09,410 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:09,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:19:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:09,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:09,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813756109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:09,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:09,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:19:09,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898688295] [2022-03-01 17:19:09,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:09,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:09,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:09,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:09,548 INFO L87 Difference]: Start difference. First operand 195 states and 523 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:09,667 INFO L93 Difference]: Finished difference Result 257 states and 632 transitions. [2022-03-01 17:19:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:19:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:09,669 INFO L225 Difference]: With dead ends: 257 [2022-03-01 17:19:09,669 INFO L226 Difference]: Without dead ends: 254 [2022-03-01 17:19:09,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:19:09,669 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 117 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:09,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 17 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-01 17:19:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 195. [2022-03-01 17:19:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.6907216494845363) internal successors, (522), 194 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 522 transitions. [2022-03-01 17:19:09,672 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 522 transitions. Word has length 16 [2022-03-01 17:19:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:09,672 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 522 transitions. [2022-03-01 17:19:09,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 522 transitions. [2022-03-01 17:19:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:09,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:09,673 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:09,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 17:19:09,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:09,873 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash 66069078, now seen corresponding path program 56 times [2022-03-01 17:19:09,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:09,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147477524] [2022-03-01 17:19:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:09,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:09,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:09,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147477524] [2022-03-01 17:19:09,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147477524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:09,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795976549] [2022-03-01 17:19:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:19:09,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:09,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:09,921 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:09,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:19:09,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:19:09,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:09,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:10,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795976549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:10,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:10,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:19:10,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752098253] [2022-03-01 17:19:10,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:10,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:19:10,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:19:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:19:10,071 INFO L87 Difference]: Start difference. First operand 195 states and 522 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:10,414 INFO L93 Difference]: Finished difference Result 366 states and 770 transitions. [2022-03-01 17:19:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:19:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:10,415 INFO L225 Difference]: With dead ends: 366 [2022-03-01 17:19:10,415 INFO L226 Difference]: Without dead ends: 366 [2022-03-01 17:19:10,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:19:10,416 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:10,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 65 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-01 17:19:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 200. [2022-03-01 17:19:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.708542713567839) internal successors, (539), 199 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 539 transitions. [2022-03-01 17:19:10,424 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 539 transitions. Word has length 16 [2022-03-01 17:19:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:10,424 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 539 transitions. [2022-03-01 17:19:10,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 539 transitions. [2022-03-01 17:19:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:10,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:10,425 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:10,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:10,640 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,SelfDestructingSolverStorable59 [2022-03-01 17:19:10,640 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash -789083068, now seen corresponding path program 57 times [2022-03-01 17:19:10,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:10,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342533775] [2022-03-01 17:19:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:10,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:10,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342533775] [2022-03-01 17:19:10,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342533775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:10,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796119831] [2022-03-01 17:19:10,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:19:10,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:10,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:10,689 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:10,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:19:10,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:19:10,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:10,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:10,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796119831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:10,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:10,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:19:10,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209247712] [2022-03-01 17:19:10,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:10,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:19:10,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:19:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:19:10,803 INFO L87 Difference]: Start difference. First operand 200 states and 539 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:10,911 INFO L93 Difference]: Finished difference Result 261 states and 646 transitions. [2022-03-01 17:19:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:19:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 16 [2022-03-01 17:19:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:10,912 INFO L225 Difference]: With dead ends: 261 [2022-03-01 17:19:10,912 INFO L226 Difference]: Without dead ends: 257 [2022-03-01 17:19:10,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:19:10,913 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 92 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:10,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 19 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-01 17:19:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 200. [2022-03-01 17:19:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.7035175879396984) internal successors, (538), 199 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 538 transitions. [2022-03-01 17:19:10,918 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 538 transitions. Word has length 16 [2022-03-01 17:19:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:10,918 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 538 transitions. [2022-03-01 17:19:10,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 538 transitions. [2022-03-01 17:19:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:10,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:10,919 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:10,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:11,134 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,SelfDestructingSolverStorable60 [2022-03-01 17:19:11,134 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1007016302, now seen corresponding path program 58 times [2022-03-01 17:19:11,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:11,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885188979] [2022-03-01 17:19:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:11,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:11,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:11,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885188979] [2022-03-01 17:19:11,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885188979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:11,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452949263] [2022-03-01 17:19:11,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:19:11,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:11,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:11,194 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:11,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:19:11,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:19:11,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:11,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:11,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:11,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452949263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:11,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:11,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:19:11,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034053791] [2022-03-01 17:19:11,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:19:11,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:19:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:19:11,324 INFO L87 Difference]: Start difference. First operand 200 states and 538 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:11,663 INFO L93 Difference]: Finished difference Result 312 states and 708 transitions. [2022-03-01 17:19:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:19:11,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 16 [2022-03-01 17:19:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:11,664 INFO L225 Difference]: With dead ends: 312 [2022-03-01 17:19:11,664 INFO L226 Difference]: Without dead ends: 312 [2022-03-01 17:19:11,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:19:11,665 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:11,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 31 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-01 17:19:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 205. [2022-03-01 17:19:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.715686274509804) internal successors, (554), 204 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 554 transitions. [2022-03-01 17:19:11,668 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 554 transitions. Word has length 16 [2022-03-01 17:19:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:11,669 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 554 transitions. [2022-03-01 17:19:11,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-03-01 17:19:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 554 transitions. [2022-03-01 17:19:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:11,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:11,669 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:11,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:11,879 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,SelfDestructingSolverStorable61 [2022-03-01 17:19:11,879 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1905446374, now seen corresponding path program 59 times [2022-03-01 17:19:11,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:11,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842258177] [2022-03-01 17:19:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:11,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:11,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:11,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842258177] [2022-03-01 17:19:11,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842258177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:11,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224871639] [2022-03-01 17:19:11,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:19:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:11,921 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:11,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:19:11,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:19:11,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:11,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:11,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:11,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:12,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224871639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:12,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:12,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:19:12,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569110221] [2022-03-01 17:19:12,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:12,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:19:12,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:19:12,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:19:12,029 INFO L87 Difference]: Start difference. First operand 205 states and 554 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:12,123 INFO L93 Difference]: Finished difference Result 265 states and 659 transitions. [2022-03-01 17:19:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:19:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:12,124 INFO L225 Difference]: With dead ends: 265 [2022-03-01 17:19:12,124 INFO L226 Difference]: Without dead ends: 260 [2022-03-01 17:19:12,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:19:12,125 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:12,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:19:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-03-01 17:19:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 205. [2022-03-01 17:19:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.7107843137254903) internal successors, (553), 204 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 553 transitions. [2022-03-01 17:19:12,128 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 553 transitions. Word has length 16 [2022-03-01 17:19:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:12,128 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 553 transitions. [2022-03-01 17:19:12,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 553 transitions. [2022-03-01 17:19:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:12,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:12,128 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:12,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:12,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:12,335 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash 87075286, now seen corresponding path program 60 times [2022-03-01 17:19:12,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:12,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557992400] [2022-03-01 17:19:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:12,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:12,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557992400] [2022-03-01 17:19:12,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557992400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:12,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118099742] [2022-03-01 17:19:12,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:19:12,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:12,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:12,387 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:12,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:19:12,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:19:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:12,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:12,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:12,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118099742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:12,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:12,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:19:12,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281299894] [2022-03-01 17:19:12,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:12,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:19:12,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:19:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:19:12,502 INFO L87 Difference]: Start difference. First operand 205 states and 553 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:12,718 INFO L93 Difference]: Finished difference Result 318 states and 750 transitions. [2022-03-01 17:19:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:19:12,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:12,720 INFO L225 Difference]: With dead ends: 318 [2022-03-01 17:19:12,720 INFO L226 Difference]: Without dead ends: 318 [2022-03-01 17:19:12,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=791, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:19:12,720 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:12,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 35 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-01 17:19:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 211. [2022-03-01 17:19:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.719047619047619) internal successors, (571), 210 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 571 transitions. [2022-03-01 17:19:12,725 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 571 transitions. Word has length 16 [2022-03-01 17:19:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:12,725 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 571 transitions. [2022-03-01 17:19:12,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 571 transitions. [2022-03-01 17:19:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:12,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:12,726 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:12,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 17:19:12,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:12,939 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash -463486844, now seen corresponding path program 61 times [2022-03-01 17:19:12,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:12,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861031583] [2022-03-01 17:19:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:12,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:12,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:12,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861031583] [2022-03-01 17:19:12,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861031583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:12,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147229831] [2022-03-01 17:19:12,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:19:12,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:12,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:12,986 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:12,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:19:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:13,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:13,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147229831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:13,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:13,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-01 17:19:13,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539759839] [2022-03-01 17:19:13,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:13,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:19:13,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:13,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:19:13,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:19:13,090 INFO L87 Difference]: Start difference. First operand 211 states and 571 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:13,189 INFO L93 Difference]: Finished difference Result 258 states and 662 transitions. [2022-03-01 17:19:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:19:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:13,190 INFO L225 Difference]: With dead ends: 258 [2022-03-01 17:19:13,191 INFO L226 Difference]: Without dead ends: 252 [2022-03-01 17:19:13,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:19:13,191 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:13,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 13 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:19:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-01 17:19:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 210. [2022-03-01 17:19:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.722488038277512) internal successors, (569), 209 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 569 transitions. [2022-03-01 17:19:13,194 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 569 transitions. Word has length 16 [2022-03-01 17:19:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 569 transitions. [2022-03-01 17:19:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 569 transitions. [2022-03-01 17:19:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:19:13,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:13,195 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:13,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 17:19:13,396 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,SelfDestructingSolverStorable64 [2022-03-01 17:19:13,396 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash -355823854, now seen corresponding path program 62 times [2022-03-01 17:19:13,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:13,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135580872] [2022-03-01 17:19:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:13,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:13,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:13,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135580872] [2022-03-01 17:19:13,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135580872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:13,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96400493] [2022-03-01 17:19:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:19:13,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:13,443 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:13,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:19:13,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:19:13,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:19:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:13,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:13,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96400493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:13,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:13,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-01 17:19:13,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193693835] [2022-03-01 17:19:13,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:13,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:19:13,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:19:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:19:13,513 INFO L87 Difference]: Start difference. First operand 210 states and 569 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:13,642 INFO L93 Difference]: Finished difference Result 329 states and 806 transitions. [2022-03-01 17:19:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:19:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:19:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:13,644 INFO L225 Difference]: With dead ends: 329 [2022-03-01 17:19:13,644 INFO L226 Difference]: Without dead ends: 329 [2022-03-01 17:19:13,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:19:13,644 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:13,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 25 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-01 17:19:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 219. [2022-03-01 17:19:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.7247706422018347) internal successors, (594), 218 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 594 transitions. [2022-03-01 17:19:13,648 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 594 transitions. Word has length 16 [2022-03-01 17:19:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:13,648 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 594 transitions. [2022-03-01 17:19:13,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 594 transitions. [2022-03-01 17:19:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:19:13,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:13,649 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:13,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 17:19:13,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-01 17:19:13,865 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 77150327, now seen corresponding path program 63 times [2022-03-01 17:19:13,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:13,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495671141] [2022-03-01 17:19:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:13,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:19:13,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:13,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495671141] [2022-03-01 17:19:13,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495671141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:13,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464409856] [2022-03-01 17:19:13,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:19:13,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:13,976 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:13,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:19:13,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:19:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:13,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:19:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:19:14,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:19:14,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464409856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:19:14,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:19:14,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-03-01 17:19:14,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366480290] [2022-03-01 17:19:14,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:19:14,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:19:14,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:19:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:19:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:19:14,179 INFO L87 Difference]: Start difference. First operand 219 states and 594 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 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) [2022-03-01 17:19:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:19:14,390 INFO L93 Difference]: Finished difference Result 902 states and 2406 transitions. [2022-03-01 17:19:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:19:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 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 17 [2022-03-01 17:19:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:19:14,393 INFO L225 Difference]: With dead ends: 902 [2022-03-01 17:19:14,394 INFO L226 Difference]: Without dead ends: 895 [2022-03-01 17:19:14,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:19:14,394 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 171 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:19:14,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 23 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:19:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-03-01 17:19:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 519. [2022-03-01 17:19:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.664092664092664) internal successors, (1380), 518 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:19:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1380 transitions. [2022-03-01 17:19:14,403 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1380 transitions. Word has length 17 [2022-03-01 17:19:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:19:14,403 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1380 transitions. [2022-03-01 17:19:14,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 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) [2022-03-01 17:19:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1380 transitions. [2022-03-01 17:19:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:19:14,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:19:14,404 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:19:14,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 17:19:14,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:14,613 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:19:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:19:14,613 INFO L85 PathProgramCache]: Analyzing trace with hash 350310199, now seen corresponding path program 64 times [2022-03-01 17:19:14,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:19:14,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791834986] [2022-03-01 17:19:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:19:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:19:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:19:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:14,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:19:14,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791834986] [2022-03-01 17:19:14,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791834986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:19:14,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497777824] [2022-03-01 17:19:14,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:19:14,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:19:14,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:19:14,695 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:19:14,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:19:14,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:19:14,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:19:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:19:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:19:15,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:19:15,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2022-03-01 17:19:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:19:32,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:19:35,850 INFO L353 Elim1Store]: treesize reduction 50, result has 96.7 percent of original size [2022-03-01 17:19:35,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 38 new quantified variables, introduced 190 case distinctions, treesize of input 43 treesize of output 1546 Received shutdown request... [2022-03-01 17:29:10,868 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 17:29:10,875 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 17:29:10,875 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 17:29:10,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:11,083 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,SelfDestructingSolverStorable67 [2022-03-01 17:29:11,084 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 10,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-6-2-2-2-7-2-9-1 context. [2022-03-01 17:29:11,089 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 17:29:11,089 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 17:29:11,092 INFO L732 BasicCegarLoop]: Path program histogram: [64, 2, 1, 1] [2022-03-01 17:29:11,094 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 17:29:11,094 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 17:29:11,095 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 05:29:11 BasicIcfg [2022-03-01 17:29:11,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 17:29:11,095 INFO L158 Benchmark]: Toolchain (without parser) took 867749.58ms. Allocated memory was 183.5MB in the beginning and 1.1GB in the end (delta: 938.5MB). Free memory was 142.2MB in the beginning and 713.2MB in the end (delta: -571.0MB). Peak memory consumption was 690.0MB. Max. memory is 8.0GB. [2022-03-01 17:29:11,095 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 17:29:11,096 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.10ms. Allocated memory is still 183.5MB. Free memory was 142.1MB in the beginning and 140.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 17:29:11,096 INFO L158 Benchmark]: Boogie Preprocessor took 9.91ms. Allocated memory is still 183.5MB. Free memory was 140.6MB in the beginning and 139.7MB in the end (delta: 933.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 17:29:11,096 INFO L158 Benchmark]: RCFGBuilder took 176.58ms. Allocated memory is still 183.5MB. Free memory was 139.6MB in the beginning and 128.9MB in the end (delta: 10.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-01 17:29:11,096 INFO L158 Benchmark]: TraceAbstraction took 867539.68ms. Allocated memory was 183.5MB in the beginning and 1.1GB in the end (delta: 938.5MB). Free memory was 128.4MB in the beginning and 713.2MB in the end (delta: -584.8MB). Peak memory consumption was 676.3MB. Max. memory is 8.0GB. [2022-03-01 17:29:11,096 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.10ms. Allocated memory is still 183.5MB. Free memory was 142.1MB in the beginning and 140.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.91ms. Allocated memory is still 183.5MB. Free memory was 140.6MB in the beginning and 139.7MB in the end (delta: 933.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 176.58ms. Allocated memory is still 183.5MB. Free memory was 139.6MB in the beginning and 128.9MB in the end (delta: 10.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 867539.68ms. Allocated memory was 183.5MB in the beginning and 1.1GB in the end (delta: 938.5MB). Free memory was 128.4MB in the beginning and 713.2MB in the end (delta: -584.8MB). Peak memory consumption was 676.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 10,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-6-2-2-2-7-2-9-1 context. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 10,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-6-2-2-2-7-2-9-1 context. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 10,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-6-2-2-2-7-2-9-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 867.5s, OverallIterations: 68, TraceHistogramMax: 10, PathProgramHistogramMax: 64, EmptinessCheckTime: 0.0s, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7259 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7259 mSDsluCounter, 2909 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7377 mSDsCounter, 2051 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12851 IncrementalHoareTripleChecker+Invalid, 14902 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2051 mSolverCounterUnsat, 431 mSDtfsCounter, 12851 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3237 GetRequests, 1462 SyntacticMatches, 108 SemanticMatches, 1667 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14475 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=519occurred in iteration=67, InterpolantAutomatonStates: 1462, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 67 MinimizatonAttempts, 8022 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 241.5s InterpolantComputationTime, 2039 NumberOfCodeBlocks, 2039 NumberOfCodeBlocksAsserted, 240 NumberOfCheckSat, 2849 ConstructedInterpolants, 0 QuantifiedInterpolants, 16272 SizeOfPredicates, 109 NumberOfNonLiveVariables, 3809 ConjunctsInSsa, 631 ConjunctsInUnsatCore, 195 InterpolantComputations, 3 PerfectInterpolantSequences, 1368/3632 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown