/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:56:01,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:56:01,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:56:01,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 15:56:01,991 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-Separate.epf [2022-01-18 15:56:02,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:56:02,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:56:02,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:56:02,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:56:02,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:56:02,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:56:02,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:56:02,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:56:02,038 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:56:02,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:56:02,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:56:02,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:56:02,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:56:02,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:56:02,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:56:02,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:56:02,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:56:02,040 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:56:02,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:56:02,040 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:56:02,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:56:02,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:56:02,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:56:02,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:56:02,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:56:02,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:56:02,042 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:56:02,042 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:56:02,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:56:02,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:56:02,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:56:02,220 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:56:02,221 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:56:02,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl [2022-01-18 15:56:02,222 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl' [2022-01-18 15:56:02,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:56:02,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:56:02,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:56:02,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:56:02,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:56:02,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,266 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:56:02,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:56:02,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:56:02,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:56:02,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:56:02,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:56:02,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:56:02,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:56:02,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:56:02,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/1) ... [2022-01-18 15:56:02,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:56:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:02,321 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) [2022-01-18 15:56:02,350 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 [2022-01-18 15:56:02,368 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:56:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:56:02,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:56:02,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:56:02,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:56:02,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:56:02,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:56:02,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:56:02,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:56:02,369 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:56:02,407 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:56:02,409 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:56:02,468 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:56:02,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:56:02,479 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 15:56:02,481 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:56:02 BoogieIcfgContainer [2022-01-18 15:56:02,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:56:02,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:56:02,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:56:02,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:56:02,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:56:02" (1/2) ... [2022-01-18 15:56:02,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de4d057 and model type counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:56:02, skipping insertion in model container [2022-01-18 15:56:02,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:56:02" (2/2) ... [2022-01-18 15:56:02,488 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.bpl [2022-01-18 15:56:02,491 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:56:02,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:56:02,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:56:02,491 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:56:02,509 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 15:56:02,547 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:56:02,557 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 15:56:02,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 15:56:02,564 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-01-18 15:56:02,575 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:56:02,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:02,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:02,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash 487242803, now seen corresponding path program 1 times [2022-01-18 15:56:02,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:02,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789509633] [2022-01-18 15:56:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:02,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:02,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789509633] [2022-01-18 15:56:02,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789509633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:56:02,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:56:02,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:56:02,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785083530] [2022-01-18 15:56:02,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:56:02,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:56:02,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:56:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:56:02,710 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:02,744 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-01-18 15:56:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:56:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:56:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:02,752 INFO L225 Difference]: With dead ends: 57 [2022-01-18 15:56:02,752 INFO L226 Difference]: Without dead ends: 50 [2022-01-18 15:56:02,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:56:02,758 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:02,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-18 15:56:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-01-18 15:56:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2022-01-18 15:56:02,811 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2022-01-18 15:56:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:02,812 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2022-01-18 15:56:02,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2022-01-18 15:56:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:56:02,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:02,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:02,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:56:02,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1536726091, now seen corresponding path program 1 times [2022-01-18 15:56:02,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:02,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055599363] [2022-01-18 15:56:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:02,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:02,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:02,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055599363] [2022-01-18 15:56:02,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055599363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:02,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768894658] [2022-01-18 15:56:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:02,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:02,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:02,938 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) [2022-01-18 15:56:02,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:56:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 15:56:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768894658] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:03,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 15:56:03,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-01-18 15:56:03,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042116563] [2022-01-18 15:56:03,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:56:03,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:56:03,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:56:03,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:56:03,234 INFO L87 Difference]: Start difference. First operand 41 states and 74 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) [2022-01-18 15:56:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:03,337 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2022-01-18 15:56:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:56:03,338 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 16 [2022-01-18 15:56:03,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:03,342 INFO L225 Difference]: With dead ends: 76 [2022-01-18 15:56:03,342 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 15:56:03,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:56:03,344 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:03,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 37 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 15:56:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-01-18 15:56:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-01-18 15:56:03,353 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2022-01-18 15:56:03,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:03,353 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-01-18 15:56:03,353 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) [2022-01-18 15:56:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-01-18 15:56:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:56:03,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:03,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:03,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 15:56:03,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:03,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:03,561 INFO L85 PathProgramCache]: Analyzing trace with hash -833920783, now seen corresponding path program 1 times [2022-01-18 15:56:03,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:03,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476638013] [2022-01-18 15:56:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:03,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:03,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476638013] [2022-01-18 15:56:03,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476638013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:56:03,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:56:03,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:56:03,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652974699] [2022-01-18 15:56:03,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:56:03,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:56:03,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:56:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:56:03,604 INFO L87 Difference]: Start difference. First operand 41 states and 76 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) [2022-01-18 15:56:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:03,669 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2022-01-18 15:56:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:56:03,669 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 16 [2022-01-18 15:56:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:03,670 INFO L225 Difference]: With dead ends: 71 [2022-01-18 15:56:03,670 INFO L226 Difference]: Without dead ends: 66 [2022-01-18 15:56:03,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:56:03,671 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:03,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:03,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-18 15:56:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-01-18 15:56:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2022-01-18 15:56:03,688 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2022-01-18 15:56:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:03,688 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2022-01-18 15:56:03,688 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) [2022-01-18 15:56:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2022-01-18 15:56:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:56:03,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:03,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:03,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 15:56:03,689 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2098848643, now seen corresponding path program 2 times [2022-01-18 15:56:03,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:03,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630597677] [2022-01-18 15:56:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:03,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:03,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630597677] [2022-01-18 15:56:03,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630597677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:56:03,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:56:03,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:56:03,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930762435] [2022-01-18 15:56:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:56:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:56:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:56:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:56:03,729 INFO L87 Difference]: Start difference. First operand 49 states and 91 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) [2022-01-18 15:56:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:03,778 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2022-01-18 15:56:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:56:03,778 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 16 [2022-01-18 15:56:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:03,781 INFO L225 Difference]: With dead ends: 51 [2022-01-18 15:56:03,782 INFO L226 Difference]: Without dead ends: 51 [2022-01-18 15:56:03,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:56:03,785 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:03,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-18 15:56:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-01-18 15:56:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2022-01-18 15:56:03,791 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2022-01-18 15:56:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:03,791 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2022-01-18 15:56:03,792 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) [2022-01-18 15:56:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2022-01-18 15:56:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:56:03,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:03,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:03,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 15:56:03,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash 812220571, now seen corresponding path program 2 times [2022-01-18 15:56:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:03,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386418874] [2022-01-18 15:56:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:03,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:03,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386418874] [2022-01-18 15:56:03,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386418874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:56:03,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:56:03,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:56:03,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153881700] [2022-01-18 15:56:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:56:03,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:56:03,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:56:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:56:03,839 INFO L87 Difference]: Start difference. First operand 43 states and 79 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) [2022-01-18 15:56:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:03,884 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2022-01-18 15:56:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:56:03,884 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 16 [2022-01-18 15:56:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:03,886 INFO L225 Difference]: With dead ends: 51 [2022-01-18 15:56:03,886 INFO L226 Difference]: Without dead ends: 49 [2022-01-18 15:56:03,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:56:03,886 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:03,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-18 15:56:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-01-18 15:56:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2022-01-18 15:56:03,893 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2022-01-18 15:56:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:03,893 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2022-01-18 15:56:03,893 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) [2022-01-18 15:56:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2022-01-18 15:56:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:56:03,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:03,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:03,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 15:56:03,894 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash -247842829, now seen corresponding path program 1 times [2022-01-18 15:56:03,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:03,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780557380] [2022-01-18 15:56:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:03,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:03,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780557380] [2022-01-18 15:56:03,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780557380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:03,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450632829] [2022-01-18 15:56:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:03,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:03,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:03,926 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) [2022-01-18 15:56:03,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:56:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:03,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:03,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:56:03,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:56:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:04,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 15:56:04,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 15:56:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:04,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450632829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:04,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:04,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 15:56:04,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042890751] [2022-01-18 15:56:04,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:04,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:56:04,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:56:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:56:04,043 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:04,067 INFO L93 Difference]: Finished difference Result 99 states and 186 transitions. [2022-01-18 15:56:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:56:04,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:56:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:04,068 INFO L225 Difference]: With dead ends: 99 [2022-01-18 15:56:04,069 INFO L226 Difference]: Without dead ends: 92 [2022-01-18 15:56:04,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:56:04,069 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:04,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-18 15:56:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2022-01-18 15:56:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2022-01-18 15:56:04,074 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 18 [2022-01-18 15:56:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:04,074 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2022-01-18 15:56:04,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2022-01-18 15:56:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:56:04,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:04,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:04,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:04,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 15:56:04,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1428664589, now seen corresponding path program 2 times [2022-01-18 15:56:04,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:04,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618857980] [2022-01-18 15:56:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:04,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:04,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618857980] [2022-01-18 15:56:04,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618857980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:56:04,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:56:04,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:56:04,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731775316] [2022-01-18 15:56:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:56:04,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:56:04,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:56:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:56:04,317 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:04,335 INFO L93 Difference]: Finished difference Result 118 states and 233 transitions. [2022-01-18 15:56:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:56:04,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:56:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:04,337 INFO L225 Difference]: With dead ends: 118 [2022-01-18 15:56:04,337 INFO L226 Difference]: Without dead ends: 111 [2022-01-18 15:56:04,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:56:04,338 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:04,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-18 15:56:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2022-01-18 15:56:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 181 transitions. [2022-01-18 15:56:04,350 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 181 transitions. Word has length 18 [2022-01-18 15:56:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:04,350 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 181 transitions. [2022-01-18 15:56:04,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 181 transitions. [2022-01-18 15:56:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:04,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:04,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:04,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 15:56:04,355 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash 332355189, now seen corresponding path program 3 times [2022-01-18 15:56:04,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:04,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422755198] [2022-01-18 15:56:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:04,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:04,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422755198] [2022-01-18 15:56:04,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422755198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993821608] [2022-01-18 15:56:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:04,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:04,437 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) [2022-01-18 15:56:04,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:56:04,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:56:04,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:04,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:04,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993821608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:04,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:04,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 15:56:04,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809692182] [2022-01-18 15:56:04,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:04,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:56:04,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:04,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:56:04,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:56:04,637 INFO L87 Difference]: Start difference. First operand 86 states and 181 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:04,948 INFO L93 Difference]: Finished difference Result 226 states and 433 transitions. [2022-01-18 15:56:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:56:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:04,950 INFO L225 Difference]: With dead ends: 226 [2022-01-18 15:56:04,950 INFO L226 Difference]: Without dead ends: 226 [2022-01-18 15:56:04,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:56:04,951 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 141 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:04,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 107 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-18 15:56:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 88. [2022-01-18 15:56:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2022-01-18 15:56:04,955 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 20 [2022-01-18 15:56:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:04,956 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2022-01-18 15:56:04,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2022-01-18 15:56:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:04,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:04,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:04,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:05,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:05,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1418390705, now seen corresponding path program 4 times [2022-01-18 15:56:05,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:05,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100767605] [2022-01-18 15:56:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:05,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:05,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100767605] [2022-01-18 15:56:05,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100767605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105790484] [2022-01-18 15:56:05,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:05,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:05,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:05,226 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) [2022-01-18 15:56:05,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:56:05,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:05,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:05,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105790484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:05,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:05,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 15:56:05,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408791482] [2022-01-18 15:56:05,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:05,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:56:05,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:56:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:05,431 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:05,729 INFO L93 Difference]: Finished difference Result 257 states and 488 transitions. [2022-01-18 15:56:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:56:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:05,731 INFO L225 Difference]: With dead ends: 257 [2022-01-18 15:56:05,731 INFO L226 Difference]: Without dead ends: 234 [2022-01-18 15:56:05,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:56:05,732 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 194 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:05,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 67 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-18 15:56:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 108. [2022-01-18 15:56:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.149532710280374) internal successors, (230), 107 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 230 transitions. [2022-01-18 15:56:05,738 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 230 transitions. Word has length 20 [2022-01-18 15:56:05,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:05,738 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 230 transitions. [2022-01-18 15:56:05,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 230 transitions. [2022-01-18 15:56:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:05,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:05,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:05,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:05,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:05,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:05,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:05,956 INFO L85 PathProgramCache]: Analyzing trace with hash 985887361, now seen corresponding path program 5 times [2022-01-18 15:56:05,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:05,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859602235] [2022-01-18 15:56:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:05,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859602235] [2022-01-18 15:56:06,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859602235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552318227] [2022-01-18 15:56:06,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:06,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:06,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:06,012 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) [2022-01-18 15:56:06,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:56:06,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:56:06,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552318227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:06,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:06,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 15:56:06,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293904675] [2022-01-18 15:56:06,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:06,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:56:06,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:56:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:56:06,234 INFO L87 Difference]: Start difference. First operand 108 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:06,563 INFO L93 Difference]: Finished difference Result 275 states and 516 transitions. [2022-01-18 15:56:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:56:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:06,564 INFO L225 Difference]: With dead ends: 275 [2022-01-18 15:56:06,564 INFO L226 Difference]: Without dead ends: 275 [2022-01-18 15:56:06,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:56:06,565 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 223 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:06,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 114 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-18 15:56:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 131. [2022-01-18 15:56:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.230769230769231) internal successors, (290), 130 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 290 transitions. [2022-01-18 15:56:06,572 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 290 transitions. Word has length 20 [2022-01-18 15:56:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:06,572 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 290 transitions. [2022-01-18 15:56:06,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 290 transitions. [2022-01-18 15:56:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:06,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:06,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:06,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:06,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 15:56:06,783 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -398010721, now seen corresponding path program 6 times [2022-01-18 15:56:06,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111282885] [2022-01-18 15:56:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:06,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111282885] [2022-01-18 15:56:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111282885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200775709] [2022-01-18 15:56:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:06,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:06,833 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) [2022-01-18 15:56:06,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:56:06,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:06,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:06,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:06,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:56:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200775709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:07,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:07,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 15:56:07,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915469839] [2022-01-18 15:56:07,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:07,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:56:07,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:56:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:07,046 INFO L87 Difference]: Start difference. First operand 131 states and 290 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:07,261 INFO L93 Difference]: Finished difference Result 208 states and 429 transitions. [2022-01-18 15:56:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:56:07,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:07,262 INFO L225 Difference]: With dead ends: 208 [2022-01-18 15:56:07,262 INFO L226 Difference]: Without dead ends: 204 [2022-01-18 15:56:07,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:56:07,263 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 125 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:07,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 52 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-18 15:56:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2022-01-18 15:56:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.212121212121212) internal successors, (292), 132 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 292 transitions. [2022-01-18 15:56:07,266 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 292 transitions. Word has length 20 [2022-01-18 15:56:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:07,267 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 292 transitions. [2022-01-18 15:56:07,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 292 transitions. [2022-01-18 15:56:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:07,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:07,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:07,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:07,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -182759819, now seen corresponding path program 7 times [2022-01-18 15:56:07,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449180552] [2022-01-18 15:56:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:07,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:07,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449180552] [2022-01-18 15:56:07,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449180552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988366846] [2022-01-18 15:56:07,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:07,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:07,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:07,529 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) [2022-01-18 15:56:07,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:56:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:07,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:07,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:07,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:07,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988366846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:07,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:07,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 15:56:07,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591589143] [2022-01-18 15:56:07,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:07,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:56:07,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:07,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:56:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:56:07,741 INFO L87 Difference]: Start difference. First operand 133 states and 292 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:08,089 INFO L93 Difference]: Finished difference Result 362 states and 711 transitions. [2022-01-18 15:56:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:56:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:08,090 INFO L225 Difference]: With dead ends: 362 [2022-01-18 15:56:08,091 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 15:56:08,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:56:08,091 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 218 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:08,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 95 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 15:56:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 176. [2022-01-18 15:56:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.297142857142857) internal successors, (402), 175 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 402 transitions. [2022-01-18 15:56:08,097 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 402 transitions. Word has length 20 [2022-01-18 15:56:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:08,097 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 402 transitions. [2022-01-18 15:56:08,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 402 transitions. [2022-01-18 15:56:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:08,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:08,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:08,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:08,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:08,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 520045489, now seen corresponding path program 8 times [2022-01-18 15:56:08,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:08,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587698258] [2022-01-18 15:56:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:08,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:08,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587698258] [2022-01-18 15:56:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587698258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5578155] [2022-01-18 15:56:08,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:08,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:08,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:08,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:56:08,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:08,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:08,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:08,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5578155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:08,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:08,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 15:56:08,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415691519] [2022-01-18 15:56:08,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:08,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:56:08,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:56:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:08,568 INFO L87 Difference]: Start difference. First operand 176 states and 402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:08,778 INFO L93 Difference]: Finished difference Result 248 states and 522 transitions. [2022-01-18 15:56:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:56:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:08,779 INFO L225 Difference]: With dead ends: 248 [2022-01-18 15:56:08,779 INFO L226 Difference]: Without dead ends: 242 [2022-01-18 15:56:08,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:08,780 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:08,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 89 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-18 15:56:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 182. [2022-01-18 15:56:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.3259668508287294) internal successors, (421), 181 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 421 transitions. [2022-01-18 15:56:08,784 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 421 transitions. Word has length 20 [2022-01-18 15:56:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:08,784 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 421 transitions. [2022-01-18 15:56:08,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 421 transitions. [2022-01-18 15:56:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:08,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:08,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:08,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:08,999 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,SelfDestructingSolverStorable12 [2022-01-18 15:56:08,999 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2128780453, now seen corresponding path program 9 times [2022-01-18 15:56:09,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077740516] [2022-01-18 15:56:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:09,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:09,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:09,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077740516] [2022-01-18 15:56:09,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077740516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:09,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130902512] [2022-01-18 15:56:09,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:09,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:09,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:09,042 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) [2022-01-18 15:56:09,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:56:09,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:56:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:09,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:09,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130902512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:09,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:09,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 15:56:09,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708611257] [2022-01-18 15:56:09,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:09,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:56:09,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:56:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:09,220 INFO L87 Difference]: Start difference. First operand 182 states and 421 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:09,487 INFO L93 Difference]: Finished difference Result 300 states and 621 transitions. [2022-01-18 15:56:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:56:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:09,489 INFO L225 Difference]: With dead ends: 300 [2022-01-18 15:56:09,489 INFO L226 Difference]: Without dead ends: 296 [2022-01-18 15:56:09,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:56:09,489 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 224 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:09,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 43 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-18 15:56:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 182. [2022-01-18 15:56:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.314917127071823) internal successors, (419), 181 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 419 transitions. [2022-01-18 15:56:09,494 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 419 transitions. Word has length 20 [2022-01-18 15:56:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:09,494 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 419 transitions. [2022-01-18 15:56:09,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:09,494 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 419 transitions. [2022-01-18 15:56:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:56:09,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:09,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:09,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:09,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 15:56:09,710 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1659840577, now seen corresponding path program 10 times [2022-01-18 15:56:09,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545843348] [2022-01-18 15:56:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:09,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:09,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545843348] [2022-01-18 15:56:09,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545843348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543935498] [2022-01-18 15:56:09,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:09,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:09,749 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) [2022-01-18 15:56:09,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:56:09,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:09,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:09,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:09,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:09,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543935498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:09,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:09,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 15:56:09,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171249434] [2022-01-18 15:56:09,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:09,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:56:09,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:56:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:09,916 INFO L87 Difference]: Start difference. First operand 182 states and 419 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:10,164 INFO L93 Difference]: Finished difference Result 296 states and 623 transitions. [2022-01-18 15:56:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:56:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:56:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:10,165 INFO L225 Difference]: With dead ends: 296 [2022-01-18 15:56:10,165 INFO L226 Difference]: Without dead ends: 284 [2022-01-18 15:56:10,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:56:10,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:10,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 58 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-18 15:56:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 193. [2022-01-18 15:56:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3125) internal successors, (444), 192 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) [2022-01-18 15:56:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 444 transitions. [2022-01-18 15:56:10,170 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 444 transitions. Word has length 20 [2022-01-18 15:56:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:10,170 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 444 transitions. [2022-01-18 15:56:10,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 444 transitions. [2022-01-18 15:56:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:56:10,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:10,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:10,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:10,383 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,SelfDestructingSolverStorable14 [2022-01-18 15:56:10,383 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash 642937523, now seen corresponding path program 11 times [2022-01-18 15:56:10,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:10,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718273504] [2022-01-18 15:56:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:10,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:10,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718273504] [2022-01-18 15:56:10,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718273504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043813221] [2022-01-18 15:56:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:10,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:10,411 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) [2022-01-18 15:56:10,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:56:10,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:56:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:56:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:10,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:10,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:56:10,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:10,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:56:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:10,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:10,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:10,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-01-18 15:56:10,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:10,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 15:56:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:10,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043813221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:10,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:10,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-01-18 15:56:10,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226985637] [2022-01-18 15:56:10,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:10,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:56:10,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:56:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:56:10,641 INFO L87 Difference]: Start difference. First operand 193 states and 444 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2022-01-18 15:56:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:10,681 INFO L93 Difference]: Finished difference Result 399 states and 869 transitions. [2022-01-18 15:56:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:56:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 15:56:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:10,683 INFO L225 Difference]: With dead ends: 399 [2022-01-18 15:56:10,683 INFO L226 Difference]: Without dead ends: 392 [2022-01-18 15:56:10,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:56:10,684 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:10,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 190 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-01-18 15:56:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-18 15:56:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 271. [2022-01-18 15:56:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.3851851851851853) internal successors, (644), 270 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 644 transitions. [2022-01-18 15:56:10,690 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 644 transitions. Word has length 22 [2022-01-18 15:56:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:10,691 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 644 transitions. [2022-01-18 15:56:10,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2022-01-18 15:56:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 644 transitions. [2022-01-18 15:56:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:56:10,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:10,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:10,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:10,899 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,SelfDestructingSolverStorable15 [2022-01-18 15:56:10,899 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash 467064055, now seen corresponding path program 12 times [2022-01-18 15:56:10,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:10,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546454851] [2022-01-18 15:56:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:10,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:10,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:10,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546454851] [2022-01-18 15:56:10,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546454851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398875073] [2022-01-18 15:56:10,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:10,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:10,921 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) [2022-01-18 15:56:10,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:56:10,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:56:10,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:56:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:11,017 INFO L353 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-01-18 15:56:11,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 15:56:11,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:11,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 15:56:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:11,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:11,118 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 15:56:11,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2022-01-18 15:56:11,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:11,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2022-01-18 15:56:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:11,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398875073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:11,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:11,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-01-18 15:56:11,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685576592] [2022-01-18 15:56:11,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:11,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:56:11,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:56:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:56:11,138 INFO L87 Difference]: Start difference. First operand 271 states and 644 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:11,189 INFO L93 Difference]: Finished difference Result 341 states and 745 transitions. [2022-01-18 15:56:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:56:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 15:56:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:11,190 INFO L225 Difference]: With dead ends: 341 [2022-01-18 15:56:11,190 INFO L226 Difference]: Without dead ends: 338 [2022-01-18 15:56:11,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:56:11,191 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:11,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 160 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-18 15:56:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 263. [2022-01-18 15:56:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.377862595419847) internal successors, (623), 262 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 623 transitions. [2022-01-18 15:56:11,197 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 623 transitions. Word has length 22 [2022-01-18 15:56:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:11,197 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 623 transitions. [2022-01-18 15:56:11,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 623 transitions. [2022-01-18 15:56:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:56:11,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:11,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:11,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:11,405 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,SelfDestructingSolverStorable16 [2022-01-18 15:56:11,405 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1436229453, now seen corresponding path program 13 times [2022-01-18 15:56:11,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:11,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007749286] [2022-01-18 15:56:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:11,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:11,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007749286] [2022-01-18 15:56:11,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007749286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215773912] [2022-01-18 15:56:11,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:11,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:11,430 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) [2022-01-18 15:56:11,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:56:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:56:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:11,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:11,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2022-01-18 15:56:11,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:11,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 15:56:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:11,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:11,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:11,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2022-01-18 15:56:11,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:11,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 15:56:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:11,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215773912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:11,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:11,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-01-18 15:56:11,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871987292] [2022-01-18 15:56:11,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:11,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:56:11,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:56:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:56:11,603 INFO L87 Difference]: Start difference. First operand 263 states and 623 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2022-01-18 15:56:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:11,652 INFO L93 Difference]: Finished difference Result 443 states and 1002 transitions. [2022-01-18 15:56:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:56:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 15:56:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:11,654 INFO L225 Difference]: With dead ends: 443 [2022-01-18 15:56:11,654 INFO L226 Difference]: Without dead ends: 427 [2022-01-18 15:56:11,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:56:11,655 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 58 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:11,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 172 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:56:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-18 15:56:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 318. [2022-01-18 15:56:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.444794952681388) internal successors, (775), 317 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 775 transitions. [2022-01-18 15:56:11,661 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 775 transitions. Word has length 22 [2022-01-18 15:56:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:11,661 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 775 transitions. [2022-01-18 15:56:11,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2022-01-18 15:56:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 775 transitions. [2022-01-18 15:56:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:56:11,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:11,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:11,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:11,878 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,SelfDestructingSolverStorable17 [2022-01-18 15:56:11,878 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash -976461133, now seen corresponding path program 14 times [2022-01-18 15:56:11,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:11,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904580743] [2022-01-18 15:56:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:11,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:11,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904580743] [2022-01-18 15:56:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904580743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503387764] [2022-01-18 15:56:11,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:11,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:11,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:11,920 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) [2022-01-18 15:56:11,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:56:11,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:11,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:56:11,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:11,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:11,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:56:12,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:12,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:56:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:12,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:12,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:12,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-01-18 15:56:12,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:12,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 15:56:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:12,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503387764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:12,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:12,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-01-18 15:56:12,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149003551] [2022-01-18 15:56:12,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:12,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:56:12,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:12,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:56:12,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:56:12,129 INFO L87 Difference]: Start difference. First operand 318 states and 775 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2022-01-18 15:56:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:12,173 INFO L93 Difference]: Finished difference Result 536 states and 1220 transitions. [2022-01-18 15:56:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:56:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 22 [2022-01-18 15:56:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:12,175 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:56:12,175 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:56:12,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:56:12,176 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:12,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 183 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-01-18 15:56:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:56:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 374. [2022-01-18 15:56:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.474530831099196) internal successors, (923), 373 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 923 transitions. [2022-01-18 15:56:12,184 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 923 transitions. Word has length 22 [2022-01-18 15:56:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:12,184 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 923 transitions. [2022-01-18 15:56:12,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2022-01-18 15:56:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 923 transitions. [2022-01-18 15:56:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:12,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:12,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:12,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:12,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:12,400 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1538228171, now seen corresponding path program 15 times [2022-01-18 15:56:12,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764471952] [2022-01-18 15:56:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:12,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:12,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764471952] [2022-01-18 15:56:12,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764471952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291386145] [2022-01-18 15:56:12,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:12,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:12,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:12,471 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) [2022-01-18 15:56:12,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:56:12,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:56:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:12,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:12,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291386145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:12,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:12,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:56:12,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246855467] [2022-01-18 15:56:12,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:12,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:56:12,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:12,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:56:12,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:12,720 INFO L87 Difference]: Start difference. First operand 374 states and 923 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:13,215 INFO L93 Difference]: Finished difference Result 702 states and 1541 transitions. [2022-01-18 15:56:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:56:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:13,217 INFO L225 Difference]: With dead ends: 702 [2022-01-18 15:56:13,217 INFO L226 Difference]: Without dead ends: 702 [2022-01-18 15:56:13,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:56:13,218 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:13,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 128 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-18 15:56:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 325. [2022-01-18 15:56:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.450617283950617) internal successors, (794), 324 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 794 transitions. [2022-01-18 15:56:13,226 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 794 transitions. Word has length 24 [2022-01-18 15:56:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:13,226 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 794 transitions. [2022-01-18 15:56:13,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 794 transitions. [2022-01-18 15:56:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:13,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:13,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:13,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:13,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:13,439 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1535150223, now seen corresponding path program 16 times [2022-01-18 15:56:13,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:13,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525671635] [2022-01-18 15:56:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:13,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:13,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525671635] [2022-01-18 15:56:13,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525671635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:13,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349051046] [2022-01-18 15:56:13,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:13,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:13,498 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) [2022-01-18 15:56:13,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:56:13,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:13,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:13,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:13,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349051046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:13,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:13,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:56:13,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919035791] [2022-01-18 15:56:13,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:13,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:13,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:13,743 INFO L87 Difference]: Start difference. First operand 325 states and 794 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:14,299 INFO L93 Difference]: Finished difference Result 786 states and 1670 transitions. [2022-01-18 15:56:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:56:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:14,301 INFO L225 Difference]: With dead ends: 786 [2022-01-18 15:56:14,301 INFO L226 Difference]: Without dead ends: 742 [2022-01-18 15:56:14,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:56:14,302 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 300 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:14,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 127 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-18 15:56:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 342. [2022-01-18 15:56:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.4134897360703813) internal successors, (823), 341 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 823 transitions. [2022-01-18 15:56:14,313 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 823 transitions. Word has length 24 [2022-01-18 15:56:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:14,313 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 823 transitions. [2022-01-18 15:56:14,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 823 transitions. [2022-01-18 15:56:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:14,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:14,315 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:14,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:14,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:14,530 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash -871610747, now seen corresponding path program 17 times [2022-01-18 15:56:14,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:14,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297288982] [2022-01-18 15:56:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:14,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:14,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297288982] [2022-01-18 15:56:14,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297288982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804406384] [2022-01-18 15:56:14,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:14,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:14,587 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) [2022-01-18 15:56:14,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:56:14,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:56:14,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:14,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:14,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804406384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:14,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:14,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-01-18 15:56:14,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014134088] [2022-01-18 15:56:14,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:14,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:56:14,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:56:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:14,855 INFO L87 Difference]: Start difference. First operand 342 states and 823 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-01-18 15:56:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:15,497 INFO L93 Difference]: Finished difference Result 816 states and 1756 transitions. [2022-01-18 15:56:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 15:56:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:15,500 INFO L225 Difference]: With dead ends: 816 [2022-01-18 15:56:15,500 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 15:56:15,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:56:15,501 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:15,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 141 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 15:56:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 404. [2022-01-18 15:56:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.424317617866005) internal successors, (977), 403 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 977 transitions. [2022-01-18 15:56:15,511 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 977 transitions. Word has length 24 [2022-01-18 15:56:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:15,511 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 977 transitions. [2022-01-18 15:56:15,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-01-18 15:56:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 977 transitions. [2022-01-18 15:56:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:15,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:15,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:15,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:15,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:15,727 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2039458467, now seen corresponding path program 18 times [2022-01-18 15:56:15,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:15,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322609828] [2022-01-18 15:56:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:15,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:15,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:15,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322609828] [2022-01-18 15:56:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322609828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:15,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540792239] [2022-01-18 15:56:15,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:15,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:15,779 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) [2022-01-18 15:56:15,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:56:15,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 15:56:15,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:15,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:15,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:16,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540792239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:16,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:16,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 15:56:16,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754927064] [2022-01-18 15:56:16,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:16,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:16,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:16,066 INFO L87 Difference]: Start difference. First operand 404 states and 977 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:16,451 INFO L93 Difference]: Finished difference Result 548 states and 1247 transitions. [2022-01-18 15:56:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:56:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:16,455 INFO L225 Difference]: With dead ends: 548 [2022-01-18 15:56:16,455 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 15:56:16,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:56:16,456 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:16,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 15:56:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 404. [2022-01-18 15:56:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.4218362282878414) internal successors, (976), 403 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 976 transitions. [2022-01-18 15:56:16,465 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 976 transitions. Word has length 24 [2022-01-18 15:56:16,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:16,465 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 976 transitions. [2022-01-18 15:56:16,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 976 transitions. [2022-01-18 15:56:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:16,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:16,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:16,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:16,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:16,679 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:16,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1840145777, now seen corresponding path program 19 times [2022-01-18 15:56:16,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:16,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923806917] [2022-01-18 15:56:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:16,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:16,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:16,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923806917] [2022-01-18 15:56:16,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923806917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:16,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832984925] [2022-01-18 15:56:16,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:16,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:16,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:16,740 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) [2022-01-18 15:56:16,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:56:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:16,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:16,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:17,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832984925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:17,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:17,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 15:56:17,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820605515] [2022-01-18 15:56:17,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:17,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:17,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:17,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:17,006 INFO L87 Difference]: Start difference. First operand 404 states and 976 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:17,419 INFO L93 Difference]: Finished difference Result 648 states and 1454 transitions. [2022-01-18 15:56:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:56:17,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:17,421 INFO L225 Difference]: With dead ends: 648 [2022-01-18 15:56:17,421 INFO L226 Difference]: Without dead ends: 636 [2022-01-18 15:56:17,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:56:17,422 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:17,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 97 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-18 15:56:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 426. [2022-01-18 15:56:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.4376470588235293) internal successors, (1036), 425 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1036 transitions. [2022-01-18 15:56:17,431 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1036 transitions. Word has length 24 [2022-01-18 15:56:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:17,431 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1036 transitions. [2022-01-18 15:56:17,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1036 transitions. [2022-01-18 15:56:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:17,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:17,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:17,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:17,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:17,647 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1315026431, now seen corresponding path program 20 times [2022-01-18 15:56:17,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:17,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71319930] [2022-01-18 15:56:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:17,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:17,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:17,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71319930] [2022-01-18 15:56:17,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71319930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:17,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014492147] [2022-01-18 15:56:17,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:17,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:17,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:17,696 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) [2022-01-18 15:56:17,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:56:17,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:17,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:17,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014492147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:17,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:17,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:56:17,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875720420] [2022-01-18 15:56:17,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:17,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:17,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:17,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:17,944 INFO L87 Difference]: Start difference. First operand 426 states and 1036 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:18,376 INFO L93 Difference]: Finished difference Result 690 states and 1541 transitions. [2022-01-18 15:56:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:56:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:18,380 INFO L225 Difference]: With dead ends: 690 [2022-01-18 15:56:18,380 INFO L226 Difference]: Without dead ends: 676 [2022-01-18 15:56:18,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:56:18,381 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:18,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 100 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-18 15:56:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 412. [2022-01-18 15:56:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.4184914841849148) internal successors, (994), 411 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 994 transitions. [2022-01-18 15:56:18,389 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 994 transitions. Word has length 24 [2022-01-18 15:56:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:18,389 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 994 transitions. [2022-01-18 15:56:18,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 994 transitions. [2022-01-18 15:56:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:18,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:18,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:18,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:18,593 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,SelfDestructingSolverStorable24 [2022-01-18 15:56:18,593 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1314117941, now seen corresponding path program 21 times [2022-01-18 15:56:18,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:18,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095656981] [2022-01-18 15:56:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:18,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:18,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:18,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095656981] [2022-01-18 15:56:18,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095656981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:18,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083521935] [2022-01-18 15:56:18,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:18,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:18,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:18,654 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) [2022-01-18 15:56:18,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:56:18,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:56:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:18,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:18,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083521935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:18,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:18,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:56:18,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316607203] [2022-01-18 15:56:18,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:18,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:56:18,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:18,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:56:18,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:18,921 INFO L87 Difference]: Start difference. First operand 412 states and 994 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:19,511 INFO L93 Difference]: Finished difference Result 858 states and 1852 transitions. [2022-01-18 15:56:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:56:19,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:19,513 INFO L225 Difference]: With dead ends: 858 [2022-01-18 15:56:19,514 INFO L226 Difference]: Without dead ends: 858 [2022-01-18 15:56:19,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:56:19,515 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 264 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:19,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 181 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-01-18 15:56:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 429. [2022-01-18 15:56:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.397196261682243) internal successors, (1026), 428 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1026 transitions. [2022-01-18 15:56:19,523 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1026 transitions. Word has length 24 [2022-01-18 15:56:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:19,523 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1026 transitions. [2022-01-18 15:56:19,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1026 transitions. [2022-01-18 15:56:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:19,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:19,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:19,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:19,738 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,SelfDestructingSolverStorable25 [2022-01-18 15:56:19,738 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1894813839, now seen corresponding path program 22 times [2022-01-18 15:56:19,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:19,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557496761] [2022-01-18 15:56:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:19,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:19,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:19,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557496761] [2022-01-18 15:56:19,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557496761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:19,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206876290] [2022-01-18 15:56:19,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:19,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:19,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:19,782 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) [2022-01-18 15:56:19,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:56:19,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:19,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:19,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:19,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:20,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206876290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:20,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:20,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:56:20,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272938021] [2022-01-18 15:56:20,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:20,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:20,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:20,027 INFO L87 Difference]: Start difference. First operand 429 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:20,400 INFO L93 Difference]: Finished difference Result 588 states and 1296 transitions. [2022-01-18 15:56:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:56:20,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:20,402 INFO L225 Difference]: With dead ends: 588 [2022-01-18 15:56:20,402 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 15:56:20,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1079, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:56:20,403 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:20,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 123 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 15:56:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 423. [2022-01-18 15:56:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.3981042654028437) internal successors, (1012), 422 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1012 transitions. [2022-01-18 15:56:20,409 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1012 transitions. Word has length 24 [2022-01-18 15:56:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:20,409 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1012 transitions. [2022-01-18 15:56:20,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1012 transitions. [2022-01-18 15:56:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:20,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:20,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:20,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:20,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 15:56:20,619 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash 593064501, now seen corresponding path program 23 times [2022-01-18 15:56:20,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:20,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313988481] [2022-01-18 15:56:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:20,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:20,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:20,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313988481] [2022-01-18 15:56:20,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313988481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:20,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813150688] [2022-01-18 15:56:20,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:20,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:20,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:20,676 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:20,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:56:20,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:56:20,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:20,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:20,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:20,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:20,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813150688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:20,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:20,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:56:20,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943147557] [2022-01-18 15:56:20,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:20,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:56:20,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:56:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:20,945 INFO L87 Difference]: Start difference. First operand 423 states and 1012 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:21,691 INFO L93 Difference]: Finished difference Result 1009 states and 2226 transitions. [2022-01-18 15:56:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:56:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:21,694 INFO L225 Difference]: With dead ends: 1009 [2022-01-18 15:56:21,694 INFO L226 Difference]: Without dead ends: 1009 [2022-01-18 15:56:21,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1165, Invalid=2741, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 15:56:21,695 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 360 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:21,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 166 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-01-18 15:56:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 622. [2022-01-18 15:56:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4621578099838968) internal successors, (1529), 621 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1529 transitions. [2022-01-18 15:56:21,706 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1529 transitions. Word has length 24 [2022-01-18 15:56:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:21,706 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1529 transitions. [2022-01-18 15:56:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1529 transitions. [2022-01-18 15:56:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:21,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:21,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:21,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 15:56:21,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:21,922 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1352956133, now seen corresponding path program 24 times [2022-01-18 15:56:21,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:21,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131423881] [2022-01-18 15:56:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:21,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:21,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:21,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131423881] [2022-01-18 15:56:21,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131423881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:21,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344279677] [2022-01-18 15:56:21,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:21,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:21,966 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) [2022-01-18 15:56:21,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:56:21,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:56:21,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:22,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:22,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344279677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:22,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:22,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 15:56:22,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650203611] [2022-01-18 15:56:22,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:22,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:22,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:22,216 INFO L87 Difference]: Start difference. First operand 622 states and 1529 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:22,676 INFO L93 Difference]: Finished difference Result 871 states and 1982 transitions. [2022-01-18 15:56:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:56:22,677 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:22,679 INFO L225 Difference]: With dead ends: 871 [2022-01-18 15:56:22,679 INFO L226 Difference]: Without dead ends: 867 [2022-01-18 15:56:22,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=724, Invalid=1726, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:56:22,680 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 245 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:22,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 67 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-18 15:56:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 622. [2022-01-18 15:56:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4557165861513686) internal successors, (1525), 621 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1525 transitions. [2022-01-18 15:56:22,689 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1525 transitions. Word has length 24 [2022-01-18 15:56:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:22,689 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1525 transitions. [2022-01-18 15:56:22,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1525 transitions. [2022-01-18 15:56:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:22,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:22,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:22,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:22,905 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,SelfDestructingSolverStorable28 [2022-01-18 15:56:22,906 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1859302399, now seen corresponding path program 25 times [2022-01-18 15:56:22,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:22,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744197044] [2022-01-18 15:56:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:22,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:22,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:22,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744197044] [2022-01-18 15:56:22,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744197044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858027439] [2022-01-18 15:56:22,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:22,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:22,956 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) [2022-01-18 15:56:22,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:56:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:22,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:22,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:23,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:23,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858027439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:23,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:23,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:56:23,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302233254] [2022-01-18 15:56:23,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:23,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:23,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:23,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:23,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:23,196 INFO L87 Difference]: Start difference. First operand 622 states and 1525 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:23,635 INFO L93 Difference]: Finished difference Result 948 states and 2156 transitions. [2022-01-18 15:56:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:56:23,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:23,638 INFO L225 Difference]: With dead ends: 948 [2022-01-18 15:56:23,638 INFO L226 Difference]: Without dead ends: 936 [2022-01-18 15:56:23,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:56:23,639 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 320 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:23,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 77 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-18 15:56:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 675. [2022-01-18 15:56:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.4614243323442135) internal successors, (1659), 674 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1659 transitions. [2022-01-18 15:56:23,649 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1659 transitions. Word has length 24 [2022-01-18 15:56:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:23,649 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1659 transitions. [2022-01-18 15:56:23,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1659 transitions. [2022-01-18 15:56:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:56:23,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:23,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:23,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:23,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:23,857 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2086523779, now seen corresponding path program 26 times [2022-01-18 15:56:23,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:23,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019539121] [2022-01-18 15:56:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:23,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:23,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019539121] [2022-01-18 15:56:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019539121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386014807] [2022-01-18 15:56:23,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:23,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:23,912 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) [2022-01-18 15:56:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:56:23,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 15:56:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:24,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:24,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386014807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:24,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:24,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:56:24,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694822304] [2022-01-18 15:56:24,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:24,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:24,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:24,137 INFO L87 Difference]: Start difference. First operand 675 states and 1659 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:24,540 INFO L93 Difference]: Finished difference Result 948 states and 2180 transitions. [2022-01-18 15:56:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:56:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:56:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:24,543 INFO L225 Difference]: With dead ends: 948 [2022-01-18 15:56:24,543 INFO L226 Difference]: Without dead ends: 928 [2022-01-18 15:56:24,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:56:24,544 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 239 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:24,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 81 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-18 15:56:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 699. [2022-01-18 15:56:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.4713467048710602) internal successors, (1725), 698 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1725 transitions. [2022-01-18 15:56:24,554 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1725 transitions. Word has length 24 [2022-01-18 15:56:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:24,554 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1725 transitions. [2022-01-18 15:56:24,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1725 transitions. [2022-01-18 15:56:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:56:24,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:24,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:24,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:24,764 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,SelfDestructingSolverStorable30 [2022-01-18 15:56:24,765 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1691341709, now seen corresponding path program 27 times [2022-01-18 15:56:24,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:24,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195077121] [2022-01-18 15:56:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:24,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:24,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195077121] [2022-01-18 15:56:24,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195077121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035758177] [2022-01-18 15:56:24,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:24,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:24,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:24,787 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) [2022-01-18 15:56:24,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:56:24,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:56:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:56:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:24,864 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 15:56:24,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 15:56:25,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:25,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-01-18 15:56:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:25,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:25,227 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 15:56:25,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:56:25,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:25,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-01-18 15:56:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:25,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035758177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:25,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:25,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-01-18 15:56:25,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653022475] [2022-01-18 15:56:25,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:25,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:56:25,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:56:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:56:25,260 INFO L87 Difference]: Start difference. First operand 699 states and 1725 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:25,311 INFO L93 Difference]: Finished difference Result 1093 states and 2595 transitions. [2022-01-18 15:56:25,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:56:25,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:56:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:25,315 INFO L225 Difference]: With dead ends: 1093 [2022-01-18 15:56:25,315 INFO L226 Difference]: Without dead ends: 1086 [2022-01-18 15:56:25,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:56:25,315 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:25,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 335 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-01-18 15:56:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-01-18 15:56:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 874. [2022-01-18 15:56:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.491408934707904) internal successors, (2175), 873 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2175 transitions. [2022-01-18 15:56:25,328 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2175 transitions. Word has length 26 [2022-01-18 15:56:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:25,328 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 2175 transitions. [2022-01-18 15:56:25,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2175 transitions. [2022-01-18 15:56:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:56:25,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:25,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:25,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:25,539 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1092947383, now seen corresponding path program 28 times [2022-01-18 15:56:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616033487] [2022-01-18 15:56:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:25,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616033487] [2022-01-18 15:56:25,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616033487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773380229] [2022-01-18 15:56:25,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:25,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:25,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:25,564 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) [2022-01-18 15:56:25,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:56:25,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:56:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:25,630 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 15:56:25,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 15:56:25,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:25,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-01-18 15:56:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:25,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:26,042 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 15:56:26,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:56:26,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:26,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-01-18 15:56:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773380229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:26,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:26,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-01-18 15:56:26,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673246976] [2022-01-18 15:56:26,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:26,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:56:26,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:56:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:56:26,080 INFO L87 Difference]: Start difference. First operand 874 states and 2175 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:26,135 INFO L93 Difference]: Finished difference Result 1109 states and 2607 transitions. [2022-01-18 15:56:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:56:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:56:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:26,138 INFO L225 Difference]: With dead ends: 1109 [2022-01-18 15:56:26,138 INFO L226 Difference]: Without dead ends: 1106 [2022-01-18 15:56:26,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:56:26,139 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 90 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:26,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 352 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 81 Unchecked, 0.0s Time] [2022-01-18 15:56:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-01-18 15:56:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 910. [2022-01-18 15:56:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.5115511551155114) internal successors, (2283), 909 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2283 transitions. [2022-01-18 15:56:26,152 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2283 transitions. Word has length 26 [2022-01-18 15:56:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:26,152 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2283 transitions. [2022-01-18 15:56:26,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2283 transitions. [2022-01-18 15:56:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:56:26,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:26,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:26,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:26,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:26,366 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash 503132531, now seen corresponding path program 29 times [2022-01-18 15:56:26,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:26,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940793269] [2022-01-18 15:56:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:26,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:26,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940793269] [2022-01-18 15:56:26,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940793269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68595358] [2022-01-18 15:56:26,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:26,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:26,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:26,391 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) [2022-01-18 15:56:26,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:56:26,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:56:26,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:56:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:26,500 INFO L353 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2022-01-18 15:56:26,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 52 [2022-01-18 15:56:26,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:26,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2022-01-18 15:56:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:26,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:26,661 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 15:56:26,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2022-01-18 15:56:26,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:26,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-01-18 15:56:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:26,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68595358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:26,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:26,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2022-01-18 15:56:26,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106802531] [2022-01-18 15:56:26,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:26,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:56:26,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:56:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:26,695 INFO L87 Difference]: Start difference. First operand 910 states and 2283 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:26,782 INFO L93 Difference]: Finished difference Result 1218 states and 2950 transitions. [2022-01-18 15:56:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:56:26,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:56:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:26,786 INFO L225 Difference]: With dead ends: 1218 [2022-01-18 15:56:26,786 INFO L226 Difference]: Without dead ends: 1202 [2022-01-18 15:56:26,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:26,787 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 92 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:26,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 312 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-01-18 15:56:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1016. [2022-01-18 15:56:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.5448275862068965) internal successors, (2583), 1015 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2583 transitions. [2022-01-18 15:56:26,800 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2583 transitions. Word has length 26 [2022-01-18 15:56:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:26,800 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2583 transitions. [2022-01-18 15:56:26,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2583 transitions. [2022-01-18 15:56:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:56:26,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:26,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:26,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:27,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:27,011 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash 624563315, now seen corresponding path program 30 times [2022-01-18 15:56:27,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:27,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978222530] [2022-01-18 15:56:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:27,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:27,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978222530] [2022-01-18 15:56:27,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978222530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626790689] [2022-01-18 15:56:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:27,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:27,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:27,041 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) [2022-01-18 15:56:27,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:56:27,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 15:56:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:56:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:27,179 INFO L353 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-01-18 15:56:27,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 59 [2022-01-18 15:56:27,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:27,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2022-01-18 15:56:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:27,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:27,322 INFO L353 Elim1Store]: treesize reduction 60, result has 25.9 percent of original size [2022-01-18 15:56:27,323 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 72 treesize of output 76 [2022-01-18 15:56:27,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:27,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2022-01-18 15:56:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:27,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626790689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:27,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:27,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-01-18 15:56:27,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991765123] [2022-01-18 15:56:27,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:27,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:56:27,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:27,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:56:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:56:27,363 INFO L87 Difference]: Start difference. First operand 1016 states and 2583 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:27,454 INFO L93 Difference]: Finished difference Result 1343 states and 3291 transitions. [2022-01-18 15:56:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:56:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:56:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:27,459 INFO L225 Difference]: With dead ends: 1343 [2022-01-18 15:56:27,459 INFO L226 Difference]: Without dead ends: 1325 [2022-01-18 15:56:27,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:56:27,459 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 133 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:27,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 295 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-01-18 15:56:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1133. [2022-01-18 15:56:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.5680212014134276) internal successors, (2907), 1132 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2907 transitions. [2022-01-18 15:56:27,476 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2907 transitions. Word has length 26 [2022-01-18 15:56:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:27,476 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2907 transitions. [2022-01-18 15:56:27,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2907 transitions. [2022-01-18 15:56:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:56:27,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:27,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:27,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:27,683 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,SelfDestructingSolverStorable34 [2022-01-18 15:56:27,683 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1355429747, now seen corresponding path program 31 times [2022-01-18 15:56:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013228159] [2022-01-18 15:56:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:27,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:27,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:27,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013228159] [2022-01-18 15:56:27,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013228159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:27,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697373108] [2022-01-18 15:56:27,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:27,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:27,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:27,709 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) [2022-01-18 15:56:27,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:56:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:56:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:27,795 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 15:56:27,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 15:56:28,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:28,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-01-18 15:56:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:28,097 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 15:56:28,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:56:28,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:28,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-01-18 15:56:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:28,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697373108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:28,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:28,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-01-18 15:56:28,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116746046] [2022-01-18 15:56:28,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:28,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:56:28,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:56:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:56:28,128 INFO L87 Difference]: Start difference. First operand 1133 states and 2907 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:28,186 INFO L93 Difference]: Finished difference Result 1549 states and 3837 transitions. [2022-01-18 15:56:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:56:28,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:56:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:28,191 INFO L225 Difference]: With dead ends: 1549 [2022-01-18 15:56:28,191 INFO L226 Difference]: Without dead ends: 1542 [2022-01-18 15:56:28,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:56:28,191 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:28,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 383 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-01-18 15:56:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2022-01-18 15:56:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1269. [2022-01-18 15:56:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 2.586750788643533) internal successors, (3280), 1268 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 3280 transitions. [2022-01-18 15:56:28,209 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 3280 transitions. Word has length 26 [2022-01-18 15:56:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:28,209 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 3280 transitions. [2022-01-18 15:56:28,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:28,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 3280 transitions. [2022-01-18 15:56:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:28,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:28,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:28,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 15:56:28,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 15:56:28,426 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1467504395, now seen corresponding path program 32 times [2022-01-18 15:56:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178759619] [2022-01-18 15:56:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:28,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:28,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:28,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178759619] [2022-01-18 15:56:28,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178759619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:28,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224723713] [2022-01-18 15:56:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:28,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:28,508 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) [2022-01-18 15:56:28,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:56:28,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:28,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:28,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224723713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:28,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:28,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-01-18 15:56:28,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122011847] [2022-01-18 15:56:28,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:28,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:56:28,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:56:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:56:28,813 INFO L87 Difference]: Start difference. First operand 1269 states and 3280 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:29,621 INFO L93 Difference]: Finished difference Result 1911 states and 4510 transitions. [2022-01-18 15:56:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 15:56:29,621 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:29,628 INFO L225 Difference]: With dead ends: 1911 [2022-01-18 15:56:29,628 INFO L226 Difference]: Without dead ends: 1911 [2022-01-18 15:56:29,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:56:29,629 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:29,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 155 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-01-18 15:56:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1120. [2022-01-18 15:56:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.558534405719392) internal successors, (2863), 1119 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2863 transitions. [2022-01-18 15:56:29,646 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2863 transitions. Word has length 28 [2022-01-18 15:56:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:29,646 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 2863 transitions. [2022-01-18 15:56:29,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2863 transitions. [2022-01-18 15:56:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:29,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:29,648 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:29,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:29,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:29,861 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1490403633, now seen corresponding path program 33 times [2022-01-18 15:56:29,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:29,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336360145] [2022-01-18 15:56:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:29,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:29,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336360145] [2022-01-18 15:56:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336360145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608791821] [2022-01-18 15:56:29,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:29,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:29,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:29,926 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) [2022-01-18 15:56:29,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:56:29,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:56:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:29,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:29,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:30,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:30,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608791821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:30,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:30,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 15:56:30,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819467120] [2022-01-18 15:56:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:30,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:30,197 INFO L87 Difference]: Start difference. First operand 1120 states and 2863 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:31,088 INFO L93 Difference]: Finished difference Result 2104 states and 4847 transitions. [2022-01-18 15:56:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:56:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:31,092 INFO L225 Difference]: With dead ends: 2104 [2022-01-18 15:56:31,092 INFO L226 Difference]: Without dead ends: 2033 [2022-01-18 15:56:31,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1174, Invalid=3382, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:56:31,093 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 383 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:31,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 176 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-01-18 15:56:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1184. [2022-01-18 15:56:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.5393068469991547) internal successors, (3004), 1183 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3004 transitions. [2022-01-18 15:56:31,116 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3004 transitions. Word has length 28 [2022-01-18 15:56:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:31,116 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 3004 transitions. [2022-01-18 15:56:31,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3004 transitions. [2022-01-18 15:56:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:31,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:31,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:31,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 15:56:31,331 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,SelfDestructingSolverStorable37 [2022-01-18 15:56:31,331 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1110861687, now seen corresponding path program 34 times [2022-01-18 15:56:31,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700738909] [2022-01-18 15:56:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:31,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:31,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700738909] [2022-01-18 15:56:31,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700738909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299898512] [2022-01-18 15:56:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:31,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:31,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:31,391 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) [2022-01-18 15:56:31,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:56:31,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:31,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:31,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:31,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299898512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:31,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:31,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2022-01-18 15:56:31,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614681010] [2022-01-18 15:56:31,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:31,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:56:31,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:56:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:56:31,718 INFO L87 Difference]: Start difference. First operand 1184 states and 3004 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:32,813 INFO L93 Difference]: Finished difference Result 2469 states and 5839 transitions. [2022-01-18 15:56:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 15:56:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:32,817 INFO L225 Difference]: With dead ends: 2469 [2022-01-18 15:56:32,817 INFO L226 Difference]: Without dead ends: 2461 [2022-01-18 15:56:32,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1964, Invalid=5008, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 15:56:32,819 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 396 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:32,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 212 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:56:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-01-18 15:56:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1466. [2022-01-18 15:56:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 2.5419795221843002) internal successors, (3724), 1465 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 3724 transitions. [2022-01-18 15:56:32,841 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 3724 transitions. Word has length 28 [2022-01-18 15:56:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:32,841 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 3724 transitions. [2022-01-18 15:56:32,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 3724 transitions. [2022-01-18 15:56:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:32,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:32,843 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:32,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 15:56:33,050 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,SelfDestructingSolverStorable38 [2022-01-18 15:56:33,050 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:33,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1800207527, now seen corresponding path program 35 times [2022-01-18 15:56:33,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417609255] [2022-01-18 15:56:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:33,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:33,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:33,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417609255] [2022-01-18 15:56:33,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417609255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:33,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617046964] [2022-01-18 15:56:33,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:33,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:33,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:33,105 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) [2022-01-18 15:56:33,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:56:33,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 15:56:33,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:33,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:33,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617046964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:33,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:33,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 15:56:33,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706134233] [2022-01-18 15:56:33,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:33,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:33,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:33,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:33,414 INFO L87 Difference]: Start difference. First operand 1466 states and 3724 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:33,965 INFO L93 Difference]: Finished difference Result 1722 states and 4208 transitions. [2022-01-18 15:56:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:56:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:33,968 INFO L225 Difference]: With dead ends: 1722 [2022-01-18 15:56:33,968 INFO L226 Difference]: Without dead ends: 1718 [2022-01-18 15:56:33,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:56:33,969 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 197 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:33,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 74 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-01-18 15:56:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1466. [2022-01-18 15:56:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 2.5406143344709897) internal successors, (3722), 1465 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 3722 transitions. [2022-01-18 15:56:33,997 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 3722 transitions. Word has length 28 [2022-01-18 15:56:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:33,997 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 3722 transitions. [2022-01-18 15:56:33,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 3722 transitions. [2022-01-18 15:56:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:33,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:33,998 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:34,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 15:56:34,202 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,SelfDestructingSolverStorable39 [2022-01-18 15:56:34,203 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1551205937, now seen corresponding path program 36 times [2022-01-18 15:56:34,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722953110] [2022-01-18 15:56:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:34,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:34,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722953110] [2022-01-18 15:56:34,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722953110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617210536] [2022-01-18 15:56:34,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:34,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:34,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:34,254 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) [2022-01-18 15:56:34,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:56:34,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:56:34,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:34,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:34,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:34,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617210536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:34,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:34,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 15:56:34,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085637573] [2022-01-18 15:56:34,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:34,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:34,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:34,570 INFO L87 Difference]: Start difference. First operand 1466 states and 3722 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:35,193 INFO L93 Difference]: Finished difference Result 2072 states and 5046 transitions. [2022-01-18 15:56:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:56:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:35,197 INFO L225 Difference]: With dead ends: 2072 [2022-01-18 15:56:35,197 INFO L226 Difference]: Without dead ends: 2057 [2022-01-18 15:56:35,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=882, Invalid=2310, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:56:35,197 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 299 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:35,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 106 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-01-18 15:56:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1512. [2022-01-18 15:56:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 2.545996029119788) internal successors, (3847), 1511 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 3847 transitions. [2022-01-18 15:56:35,224 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 3847 transitions. Word has length 28 [2022-01-18 15:56:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:35,224 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 3847 transitions. [2022-01-18 15:56:35,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 3847 transitions. [2022-01-18 15:56:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:35,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:35,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:35,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:35,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:35,439 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:35,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1603966271, now seen corresponding path program 37 times [2022-01-18 15:56:35,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144083236] [2022-01-18 15:56:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:35,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:35,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144083236] [2022-01-18 15:56:35,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144083236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224007192] [2022-01-18 15:56:35,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:35,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:35,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:35,502 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) [2022-01-18 15:56:35,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:56:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:35,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:35,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:35,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224007192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:35,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:35,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-18 15:56:35,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249070592] [2022-01-18 15:56:35,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:35,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:35,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:35,842 INFO L87 Difference]: Start difference. First operand 1512 states and 3847 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:36,424 INFO L93 Difference]: Finished difference Result 2028 states and 4871 transitions. [2022-01-18 15:56:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:56:36,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:36,428 INFO L225 Difference]: With dead ends: 2028 [2022-01-18 15:56:36,428 INFO L226 Difference]: Without dead ends: 2014 [2022-01-18 15:56:36,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=986, Invalid=2554, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:56:36,428 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 290 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:36,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 112 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-01-18 15:56:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1522. [2022-01-18 15:56:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 2.544378698224852) internal successors, (3870), 1521 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 3870 transitions. [2022-01-18 15:56:36,448 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 3870 transitions. Word has length 28 [2022-01-18 15:56:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:36,448 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 3870 transitions. [2022-01-18 15:56:36,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 3870 transitions. [2022-01-18 15:56:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:36,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:36,450 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:36,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:36,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:36,659 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1100321219, now seen corresponding path program 38 times [2022-01-18 15:56:36,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113168677] [2022-01-18 15:56:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:36,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:36,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:36,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113168677] [2022-01-18 15:56:36,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113168677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:36,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691997255] [2022-01-18 15:56:36,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:36,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:36,717 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) [2022-01-18 15:56:36,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:56:36,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:36,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:36,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:36,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691997255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:36,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:36,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-18 15:56:36,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130617691] [2022-01-18 15:56:36,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:36,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:36,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:36,998 INFO L87 Difference]: Start difference. First operand 1522 states and 3870 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:37,572 INFO L93 Difference]: Finished difference Result 2204 states and 5233 transitions. [2022-01-18 15:56:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:56:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:37,576 INFO L225 Difference]: With dead ends: 2204 [2022-01-18 15:56:37,576 INFO L226 Difference]: Without dead ends: 2178 [2022-01-18 15:56:37,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=999, Invalid=2661, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:56:37,578 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 315 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:37,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 90 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2022-01-18 15:56:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1393. [2022-01-18 15:56:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.5229885057471266) internal successors, (3512), 1392 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 3512 transitions. [2022-01-18 15:56:37,603 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 3512 transitions. Word has length 28 [2022-01-18 15:56:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:37,605 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 3512 transitions. [2022-01-18 15:56:37,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 3512 transitions. [2022-01-18 15:56:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:37,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:37,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:37,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 15:56:37,819 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,SelfDestructingSolverStorable42 [2022-01-18 15:56:37,819 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 794141429, now seen corresponding path program 39 times [2022-01-18 15:56:37,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258582746] [2022-01-18 15:56:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:37,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:37,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:37,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258582746] [2022-01-18 15:56:37,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258582746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:37,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045206872] [2022-01-18 15:56:37,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:37,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:37,884 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) [2022-01-18 15:56:37,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:56:37,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:56:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:38,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045206872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:38,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:38,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 15:56:38,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862815434] [2022-01-18 15:56:38,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:38,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:56:38,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:38,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:56:38,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:56:38,188 INFO L87 Difference]: Start difference. First operand 1393 states and 3512 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:39,024 INFO L93 Difference]: Finished difference Result 2358 states and 5365 transitions. [2022-01-18 15:56:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 15:56:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:39,030 INFO L225 Difference]: With dead ends: 2358 [2022-01-18 15:56:39,030 INFO L226 Difference]: Without dead ends: 2358 [2022-01-18 15:56:39,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1414, Invalid=3842, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 15:56:39,031 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:39,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 234 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:56:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-01-18 15:56:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1209. [2022-01-18 15:56:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.4950331125827816) internal successors, (3014), 1208 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3014 transitions. [2022-01-18 15:56:39,053 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3014 transitions. Word has length 28 [2022-01-18 15:56:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:39,053 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 3014 transitions. [2022-01-18 15:56:39,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3014 transitions. [2022-01-18 15:56:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:39,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:39,054 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:39,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:39,267 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,SelfDestructingSolverStorable43 [2022-01-18 15:56:39,267 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash 797219377, now seen corresponding path program 40 times [2022-01-18 15:56:39,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:39,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885191459] [2022-01-18 15:56:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:39,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:39,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885191459] [2022-01-18 15:56:39,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885191459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849073057] [2022-01-18 15:56:39,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:39,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:39,327 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) [2022-01-18 15:56:39,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:56:39,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:39,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:39,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:39,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849073057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:39,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:39,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-18 15:56:39,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912041422] [2022-01-18 15:56:39,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:39,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:39,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:39,612 INFO L87 Difference]: Start difference. First operand 1209 states and 3014 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:40,192 INFO L93 Difference]: Finished difference Result 1614 states and 3748 transitions. [2022-01-18 15:56:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:56:40,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:40,204 INFO L225 Difference]: With dead ends: 1614 [2022-01-18 15:56:40,204 INFO L226 Difference]: Without dead ends: 1575 [2022-01-18 15:56:40,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:56:40,205 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 264 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:40,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 152 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-01-18 15:56:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1116. [2022-01-18 15:56:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.4699551569506726) internal successors, (2754), 1115 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2754 transitions. [2022-01-18 15:56:40,220 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2754 transitions. Word has length 28 [2022-01-18 15:56:40,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:40,220 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2754 transitions. [2022-01-18 15:56:40,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2754 transitions. [2022-01-18 15:56:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:40,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:40,221 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:40,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:40,436 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,SelfDestructingSolverStorable44 [2022-01-18 15:56:40,436 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash 626662645, now seen corresponding path program 41 times [2022-01-18 15:56:40,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:40,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395106789] [2022-01-18 15:56:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:40,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:40,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:40,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395106789] [2022-01-18 15:56:40,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395106789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:40,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395910131] [2022-01-18 15:56:40,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:40,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:40,504 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) [2022-01-18 15:56:40,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:56:40,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:56:40,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:40,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:40,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395910131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:40,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:40,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-18 15:56:40,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247567907] [2022-01-18 15:56:40,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:40,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:56:40,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:56:40,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:56:40,813 INFO L87 Difference]: Start difference. First operand 1116 states and 2754 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:41,790 INFO L93 Difference]: Finished difference Result 2277 states and 5143 transitions. [2022-01-18 15:56:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:56:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:41,793 INFO L225 Difference]: With dead ends: 2277 [2022-01-18 15:56:41,793 INFO L226 Difference]: Without dead ends: 2277 [2022-01-18 15:56:41,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1855, Invalid=4625, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 15:56:41,794 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 386 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:41,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 236 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:56:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-01-18 15:56:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1233. [2022-01-18 15:56:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.4415584415584415) internal successors, (3008), 1232 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3008 transitions. [2022-01-18 15:56:41,812 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3008 transitions. Word has length 28 [2022-01-18 15:56:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:41,812 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 3008 transitions. [2022-01-18 15:56:41,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3008 transitions. [2022-01-18 15:56:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:41,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:41,813 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:41,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 15:56:42,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 15:56:42,014 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1712698161, now seen corresponding path program 42 times [2022-01-18 15:56:42,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:42,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192508181] [2022-01-18 15:56:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:42,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:42,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192508181] [2022-01-18 15:56:42,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192508181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933434284] [2022-01-18 15:56:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:42,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:42,072 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) [2022-01-18 15:56:42,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:56:42,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:56:42,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:42,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:42,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:42,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933434284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:42,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:42,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-18 15:56:42,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037624156] [2022-01-18 15:56:42,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:42,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:42,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:42,362 INFO L87 Difference]: Start difference. First operand 1233 states and 3008 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:42,917 INFO L93 Difference]: Finished difference Result 1568 states and 3646 transitions. [2022-01-18 15:56:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:56:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:42,919 INFO L225 Difference]: With dead ends: 1568 [2022-01-18 15:56:42,919 INFO L226 Difference]: Without dead ends: 1550 [2022-01-18 15:56:42,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=758, Invalid=2104, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:56:42,920 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 217 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:42,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 177 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-01-18 15:56:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1261. [2022-01-18 15:56:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 2.447619047619048) internal successors, (3084), 1260 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3084 transitions. [2022-01-18 15:56:42,933 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3084 transitions. Word has length 28 [2022-01-18 15:56:42,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:42,934 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3084 transitions. [2022-01-18 15:56:42,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3084 transitions. [2022-01-18 15:56:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:42,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:42,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:42,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:43,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:43,136 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash -432728331, now seen corresponding path program 43 times [2022-01-18 15:56:43,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987563246] [2022-01-18 15:56:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:43,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:43,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:43,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987563246] [2022-01-18 15:56:43,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987563246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:43,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097742582] [2022-01-18 15:56:43,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:43,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:43,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:43,208 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) [2022-01-18 15:56:43,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:56:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:43,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:43,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097742582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:43,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:43,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-01-18 15:56:43,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015348401] [2022-01-18 15:56:43,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:43,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:56:43,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:56:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:56:43,545 INFO L87 Difference]: Start difference. First operand 1261 states and 3084 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:44,720 INFO L93 Difference]: Finished difference Result 2739 states and 6352 transitions. [2022-01-18 15:56:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:56:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:44,723 INFO L225 Difference]: With dead ends: 2739 [2022-01-18 15:56:44,723 INFO L226 Difference]: Without dead ends: 2739 [2022-01-18 15:56:44,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2555, Invalid=6187, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 15:56:44,725 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 471 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:44,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 206 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:56:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-01-18 15:56:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 1923. [2022-01-18 15:56:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.5057232049947973) internal successors, (4816), 1922 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 4816 transitions. [2022-01-18 15:56:44,752 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 4816 transitions. Word has length 28 [2022-01-18 15:56:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:44,752 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 4816 transitions. [2022-01-18 15:56:44,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 4816 transitions. [2022-01-18 15:56:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:44,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:44,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:44,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:44,970 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,SelfDestructingSolverStorable47 [2022-01-18 15:56:44,970 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1916218331, now seen corresponding path program 44 times [2022-01-18 15:56:44,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:44,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489581345] [2022-01-18 15:56:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:44,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:45,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:45,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489581345] [2022-01-18 15:56:45,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489581345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:45,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249476811] [2022-01-18 15:56:45,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:45,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:45,024 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) [2022-01-18 15:56:45,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:56:45,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:45,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:45,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:45,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:45,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:45,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249476811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:45,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:45,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 15:56:45,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409149440] [2022-01-18 15:56:45,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:45,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:45,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:45,333 INFO L87 Difference]: Start difference. First operand 1923 states and 4816 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:46,139 INFO L93 Difference]: Finished difference Result 2431 states and 5779 transitions. [2022-01-18 15:56:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 15:56:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:46,142 INFO L225 Difference]: With dead ends: 2431 [2022-01-18 15:56:46,142 INFO L226 Difference]: Without dead ends: 2427 [2022-01-18 15:56:46,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1432, Invalid=3538, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:56:46,148 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 320 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:46,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 93 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-01-18 15:56:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1897. [2022-01-18 15:56:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 2.50210970464135) internal successors, (4744), 1896 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 4744 transitions. [2022-01-18 15:56:46,191 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 4744 transitions. Word has length 28 [2022-01-18 15:56:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:46,191 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 4744 transitions. [2022-01-18 15:56:46,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 4744 transitions. [2022-01-18 15:56:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:46,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:46,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:46,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 15:56:46,393 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,SelfDestructingSolverStorable48 [2022-01-18 15:56:46,394 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1409872065, now seen corresponding path program 45 times [2022-01-18 15:56:46,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075140105] [2022-01-18 15:56:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:46,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:46,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075140105] [2022-01-18 15:56:46,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075140105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172195706] [2022-01-18 15:56:46,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:46,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:46,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:46,457 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) [2022-01-18 15:56:46,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:56:46,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:56:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:46,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:46,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:46,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172195706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:46,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:46,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-18 15:56:46,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371226883] [2022-01-18 15:56:46,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:46,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:46,758 INFO L87 Difference]: Start difference. First operand 1897 states and 4744 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:47,502 INFO L93 Difference]: Finished difference Result 2590 states and 6161 transitions. [2022-01-18 15:56:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:56:47,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:47,505 INFO L225 Difference]: With dead ends: 2590 [2022-01-18 15:56:47,505 INFO L226 Difference]: Without dead ends: 2578 [2022-01-18 15:56:47,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1250, Invalid=3172, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:56:47,506 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 362 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:47,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 105 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-01-18 15:56:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2046. [2022-01-18 15:56:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.5114914425427872) internal successors, (5136), 2045 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5136 transitions. [2022-01-18 15:56:47,530 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5136 transitions. Word has length 28 [2022-01-18 15:56:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:47,530 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 5136 transitions. [2022-01-18 15:56:47,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5136 transitions. [2022-01-18 15:56:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:47,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:47,532 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:47,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 15:56:47,733 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,SelfDestructingSolverStorable49 [2022-01-18 15:56:47,733 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:47,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1182650685, now seen corresponding path program 46 times [2022-01-18 15:56:47,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:47,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21885660] [2022-01-18 15:56:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:47,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:47,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:47,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21885660] [2022-01-18 15:56:47,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21885660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:47,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880903993] [2022-01-18 15:56:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:47,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:47,800 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) [2022-01-18 15:56:47,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:56:47,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:47,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:47,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:47,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:48,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880903993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:48,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-18 15:56:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287872669] [2022-01-18 15:56:48,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:48,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:48,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:48,078 INFO L87 Difference]: Start difference. First operand 2046 states and 5136 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:48,766 INFO L93 Difference]: Finished difference Result 2893 states and 6860 transitions. [2022-01-18 15:56:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 15:56:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:48,769 INFO L225 Difference]: With dead ends: 2893 [2022-01-18 15:56:48,769 INFO L226 Difference]: Without dead ends: 2873 [2022-01-18 15:56:48,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1194, Invalid=3096, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:56:48,770 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 417 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:48,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 97 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2022-01-18 15:56:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2276. [2022-01-18 15:56:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.514725274725275) internal successors, (5721), 2275 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5721 transitions. [2022-01-18 15:56:48,798 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5721 transitions. Word has length 28 [2022-01-18 15:56:48,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:48,798 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5721 transitions. [2022-01-18 15:56:48,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:48,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5721 transitions. [2022-01-18 15:56:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:56:48,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:48,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:48,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 15:56:49,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:49,001 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1866236601, now seen corresponding path program 47 times [2022-01-18 15:56:49,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387449437] [2022-01-18 15:56:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:49,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:49,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:49,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387449437] [2022-01-18 15:56:49,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387449437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:49,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647096760] [2022-01-18 15:56:49,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:49,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:49,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:49,061 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) [2022-01-18 15:56:49,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:56:49,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:56:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 15:56:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:49,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647096760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:49,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:49,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 15:56:49,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538452557] [2022-01-18 15:56:49,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:49,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:49,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:49,338 INFO L87 Difference]: Start difference. First operand 2276 states and 5721 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:49,918 INFO L93 Difference]: Finished difference Result 2881 states and 6916 transitions. [2022-01-18 15:56:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:56:49,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:56:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:49,921 INFO L225 Difference]: With dead ends: 2881 [2022-01-18 15:56:49,921 INFO L226 Difference]: Without dead ends: 2853 [2022-01-18 15:56:49,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:56:49,922 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 365 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:49,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 104 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2022-01-18 15:56:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 2329. [2022-01-18 15:56:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 2.527061855670103) internal successors, (5883), 2328 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 5883 transitions. [2022-01-18 15:56:49,948 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 5883 transitions. Word has length 28 [2022-01-18 15:56:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 5883 transitions. [2022-01-18 15:56:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 5883 transitions. [2022-01-18 15:56:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:49,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:49,951 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:49,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:50,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:50,151 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1849697587, now seen corresponding path program 48 times [2022-01-18 15:56:50,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640277509] [2022-01-18 15:56:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:50,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:50,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:50,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640277509] [2022-01-18 15:56:50,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640277509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:50,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863514712] [2022-01-18 15:56:50,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:50,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:50,179 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) [2022-01-18 15:56:50,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:56:50,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:56:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:50,451 INFO L353 Elim1Store]: treesize reduction 216, result has 25.3 percent of original size [2022-01-18 15:56:50,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 107 treesize of output 114 [2022-01-18 15:56:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:50,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:50,668 INFO L353 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2022-01-18 15:56:50,668 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 112 treesize of output 102 [2022-01-18 15:56:50,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:50,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-01-18 15:56:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:50,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863514712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:50,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:50,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-01-18 15:56:50,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561839356] [2022-01-18 15:56:50,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:50,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:56:50,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:50,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:56:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:50,733 INFO L87 Difference]: Start difference. First operand 2329 states and 5883 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:50,867 INFO L93 Difference]: Finished difference Result 2886 states and 7152 transitions. [2022-01-18 15:56:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:56:50,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:50,870 INFO L225 Difference]: With dead ends: 2886 [2022-01-18 15:56:50,870 INFO L226 Difference]: Without dead ends: 2864 [2022-01-18 15:56:50,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:50,871 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 131 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:50,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 379 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-01-18 15:56:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2615. [2022-01-18 15:56:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.5355776587605203) internal successors, (6628), 2614 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 6628 transitions. [2022-01-18 15:56:50,901 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 6628 transitions. Word has length 30 [2022-01-18 15:56:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:50,901 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 6628 transitions. [2022-01-18 15:56:50,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 6628 transitions. [2022-01-18 15:56:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:50,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:50,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:50,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 15:56:51,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:51,115 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash 729678131, now seen corresponding path program 49 times [2022-01-18 15:56:51,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:51,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052438829] [2022-01-18 15:56:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:51,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:51,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052438829] [2022-01-18 15:56:51,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052438829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601909023] [2022-01-18 15:56:51,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:51,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:51,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:51,145 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) [2022-01-18 15:56:51,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:56:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:51,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:56:51,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:51,335 INFO L353 Elim1Store]: treesize reduction 118, result has 34.8 percent of original size [2022-01-18 15:56:51,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 95 [2022-01-18 15:56:51,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:51,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 93 [2022-01-18 15:56:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:51,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:51,657 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-01-18 15:56:51,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 84 [2022-01-18 15:56:51,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:51,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-01-18 15:56:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:51,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601909023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:51,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:51,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2022-01-18 15:56:51,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097485839] [2022-01-18 15:56:51,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:51,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:56:51,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:51,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:56:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:51,727 INFO L87 Difference]: Start difference. First operand 2615 states and 6628 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:51,877 INFO L93 Difference]: Finished difference Result 3125 states and 7770 transitions. [2022-01-18 15:56:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:56:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:51,881 INFO L225 Difference]: With dead ends: 3125 [2022-01-18 15:56:51,881 INFO L226 Difference]: Without dead ends: 3109 [2022-01-18 15:56:51,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:56:51,881 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 131 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:51,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 494 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-01-18 15:56:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2022-01-18 15:56:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 2.5547703180212014) internal successors, (7230), 2830 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 7230 transitions. [2022-01-18 15:56:51,917 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 7230 transitions. Word has length 30 [2022-01-18 15:56:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:51,917 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 7230 transitions. [2022-01-18 15:56:51,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 7230 transitions. [2022-01-18 15:56:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:51,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:51,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:51,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:52,121 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,SelfDestructingSolverStorable53 [2022-01-18 15:56:52,121 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2126251315, now seen corresponding path program 50 times [2022-01-18 15:56:52,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:52,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125004081] [2022-01-18 15:56:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:52,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:52,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:52,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125004081] [2022-01-18 15:56:52,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125004081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:52,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247095536] [2022-01-18 15:56:52,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:52,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:52,155 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) [2022-01-18 15:56:52,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:56:52,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:52,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:56:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:52,325 INFO L353 Elim1Store]: treesize reduction 55, result has 47.6 percent of original size [2022-01-18 15:56:52,325 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 80 [2022-01-18 15:56:52,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:52,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 93 [2022-01-18 15:56:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:52,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:52,844 INFO L353 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2022-01-18 15:56:52,844 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 92 treesize of output 100 [2022-01-18 15:56:52,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:52,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 100 [2022-01-18 15:56:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:52,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247095536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:52,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:52,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2022-01-18 15:56:52,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746675534] [2022-01-18 15:56:52,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:52,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:56:52,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:52,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:56:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:56:52,926 INFO L87 Difference]: Start difference. First operand 2831 states and 7230 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:53,082 INFO L93 Difference]: Finished difference Result 3409 states and 8531 transitions. [2022-01-18 15:56:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:56:53,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:53,086 INFO L225 Difference]: With dead ends: 3409 [2022-01-18 15:56:53,086 INFO L226 Difference]: Without dead ends: 3384 [2022-01-18 15:56:53,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:56:53,087 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 150 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:53,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 603 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 409 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-01-18 15:56:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2022-01-18 15:56:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3017. [2022-01-18 15:56:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.570954907161804) internal successors, (7754), 3016 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 7754 transitions. [2022-01-18 15:56:53,128 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 7754 transitions. Word has length 30 [2022-01-18 15:56:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:53,128 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 7754 transitions. [2022-01-18 15:56:53,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 7754 transitions. [2022-01-18 15:56:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:53,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:53,131 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:53,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:53,337 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,SelfDestructingSolverStorable54 [2022-01-18 15:56:53,337 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash -91682509, now seen corresponding path program 51 times [2022-01-18 15:56:53,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165756281] [2022-01-18 15:56:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:53,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:53,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165756281] [2022-01-18 15:56:53,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165756281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459969643] [2022-01-18 15:56:53,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:53,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:53,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:53,366 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) [2022-01-18 15:56:53,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:56:53,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 15:56:53,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:56:53,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:53,570 INFO L353 Elim1Store]: treesize reduction 50, result has 43.8 percent of original size [2022-01-18 15:56:53,570 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 119 treesize of output 91 [2022-01-18 15:56:53,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:53,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 93 [2022-01-18 15:56:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:53,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:53,871 INFO L353 Elim1Store]: treesize reduction 80, result has 33.9 percent of original size [2022-01-18 15:56:53,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 112 [2022-01-18 15:56:53,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:53,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-01-18 15:56:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:56:53,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459969643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:53,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:53,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-01-18 15:56:53,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529269676] [2022-01-18 15:56:53,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:53,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:56:53,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:56:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:53,936 INFO L87 Difference]: Start difference. First operand 3017 states and 7754 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:54,104 INFO L93 Difference]: Finished difference Result 3632 states and 9153 transitions. [2022-01-18 15:56:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:56:54,104 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:54,109 INFO L225 Difference]: With dead ends: 3632 [2022-01-18 15:56:54,109 INFO L226 Difference]: Without dead ends: 3610 [2022-01-18 15:56:54,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:54,109 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 152 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:54,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 592 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:56:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2022-01-18 15:56:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3254. [2022-01-18 15:56:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 2.5853058715032278) internal successors, (8410), 3253 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 8410 transitions. [2022-01-18 15:56:54,159 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 8410 transitions. Word has length 30 [2022-01-18 15:56:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:54,159 INFO L470 AbstractCegarLoop]: Abstraction has 3254 states and 8410 transitions. [2022-01-18 15:56:54,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 8410 transitions. [2022-01-18 15:56:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:54,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:54,163 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:54,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 15:56:54,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 15:56:54,377 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:54,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1222308557, now seen corresponding path program 52 times [2022-01-18 15:56:54,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:54,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603451907] [2022-01-18 15:56:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:54,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:54,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603451907] [2022-01-18 15:56:54,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603451907] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337996293] [2022-01-18 15:56:54,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:54,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:54,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:54,407 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) [2022-01-18 15:56:54,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:56:54,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:54,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:56:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:54,532 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-01-18 15:56:54,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2022-01-18 15:56:55,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:55,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 96 [2022-01-18 15:56:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:55,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:55,894 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-01-18 15:56:55,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-01-18 15:56:55,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:55,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-01-18 15:56:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:55,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337996293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:55,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:55,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 17 [2022-01-18 15:56:55,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714210898] [2022-01-18 15:56:55,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:55,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:56:55,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:56:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:56:55,953 INFO L87 Difference]: Start difference. First operand 3254 states and 8410 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 15:56:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:56,057 INFO L93 Difference]: Finished difference Result 3875 states and 9849 transitions. [2022-01-18 15:56:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:56:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:56,062 INFO L225 Difference]: With dead ends: 3875 [2022-01-18 15:56:56,062 INFO L226 Difference]: Without dead ends: 3868 [2022-01-18 15:56:56,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:56:56,063 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 117 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:56,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 558 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-01-18 15:56:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-01-18 15:56:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3481. [2022-01-18 15:56:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3480 states have (on average 2.5977011494252875) internal successors, (9040), 3480 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 9040 transitions. [2022-01-18 15:56:56,115 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 9040 transitions. Word has length 30 [2022-01-18 15:56:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:56,115 INFO L470 AbstractCegarLoop]: Abstraction has 3481 states and 9040 transitions. [2022-01-18 15:56:56,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 15:56:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 9040 transitions. [2022-01-18 15:56:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:56:56,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:56,119 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:56,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:56,335 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,SelfDestructingSolverStorable56 [2022-01-18 15:56:56,335 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:56,336 INFO L85 PathProgramCache]: Analyzing trace with hash -761163595, now seen corresponding path program 53 times [2022-01-18 15:56:56,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:56,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206691723] [2022-01-18 15:56:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:56,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:56,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206691723] [2022-01-18 15:56:56,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206691723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:56,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413411915] [2022-01-18 15:56:56,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:56,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:56,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:56,441 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) [2022-01-18 15:56:56,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:56:56,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 15:56:56,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:56:56,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:56,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:56,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413411915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:56,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:56,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 15:56:56,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859700805] [2022-01-18 15:56:56,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:56,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:56:56,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:56,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:56:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:56:56,785 INFO L87 Difference]: Start difference. First operand 3481 states and 9040 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:58,026 INFO L93 Difference]: Finished difference Result 4581 states and 11214 transitions. [2022-01-18 15:56:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 15:56:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:56:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:58,032 INFO L225 Difference]: With dead ends: 4581 [2022-01-18 15:56:58,032 INFO L226 Difference]: Without dead ends: 4581 [2022-01-18 15:56:58,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 15:56:58,034 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 305 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:58,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 204 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:56:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2022-01-18 15:56:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 3164. [2022-01-18 15:56:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 2.5861523869743914) internal successors, (8180), 3163 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 8180 transitions. [2022-01-18 15:56:58,091 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 8180 transitions. Word has length 32 [2022-01-18 15:56:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:58,091 INFO L470 AbstractCegarLoop]: Abstraction has 3164 states and 8180 transitions. [2022-01-18 15:56:58,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 8180 transitions. [2022-01-18 15:56:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:56:58,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:58,094 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:58,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 15:56:58,294 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,SelfDestructingSolverStorable57 [2022-01-18 15:56:58,294 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:56:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1479898639, now seen corresponding path program 54 times [2022-01-18 15:56:58,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:58,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068061952] [2022-01-18 15:56:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:58,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:58,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068061952] [2022-01-18 15:56:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068061952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372464956] [2022-01-18 15:56:58,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:58,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:58,383 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) [2022-01-18 15:56:58,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:56:58,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 15:56:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:56:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:58,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:58,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372464956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:58,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:58,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 15:56:58,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944496098] [2022-01-18 15:56:58,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:58,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:56:58,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:56:58,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:56:58,725 INFO L87 Difference]: Start difference. First operand 3164 states and 8180 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:00,056 INFO L93 Difference]: Finished difference Result 5243 states and 12644 transitions. [2022-01-18 15:57:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 15:57:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:00,063 INFO L225 Difference]: With dead ends: 5243 [2022-01-18 15:57:00,063 INFO L226 Difference]: Without dead ends: 5139 [2022-01-18 15:57:00,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2156, Invalid=6586, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 15:57:00,064 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 627 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:00,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 195 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2022-01-18 15:57:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 3339. [2022-01-18 15:57:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 2.5820850808867584) internal successors, (8619), 3338 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 8619 transitions. [2022-01-18 15:57:00,122 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 8619 transitions. Word has length 32 [2022-01-18 15:57:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:00,122 INFO L470 AbstractCegarLoop]: Abstraction has 3339 states and 8619 transitions. [2022-01-18 15:57:00,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 8619 transitions. [2022-01-18 15:57:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:00,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:00,126 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:00,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:00,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 15:57:00,326 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1937479539, now seen corresponding path program 55 times [2022-01-18 15:57:00,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:00,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385315162] [2022-01-18 15:57:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:00,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:00,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385315162] [2022-01-18 15:57:00,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385315162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821313719] [2022-01-18 15:57:00,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:57:00,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:00,440 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) [2022-01-18 15:57:00,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:57:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:00,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821313719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:00,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:00,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-01-18 15:57:00,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205912803] [2022-01-18 15:57:00,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:00,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:57:00,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:57:00,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:57:00,934 INFO L87 Difference]: Start difference. First operand 3339 states and 8619 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:02,765 INFO L93 Difference]: Finished difference Result 6613 states and 16309 transitions. [2022-01-18 15:57:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 15:57:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:02,777 INFO L225 Difference]: With dead ends: 6613 [2022-01-18 15:57:02,777 INFO L226 Difference]: Without dead ends: 6601 [2022-01-18 15:57:02,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5469 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3893, Invalid=10149, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 15:57:02,780 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 616 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:02,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 199 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:57:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2022-01-18 15:57:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4305. [2022-01-18 15:57:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5820167286245352) internal successors, (11113), 4304 states have internal predecessors, (11113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11113 transitions. [2022-01-18 15:57:02,858 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11113 transitions. Word has length 32 [2022-01-18 15:57:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:02,858 INFO L470 AbstractCegarLoop]: Abstraction has 4305 states and 11113 transitions. [2022-01-18 15:57:02,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11113 transitions. [2022-01-18 15:57:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:02,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:02,863 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:02,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 15:57:03,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:03,063 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash 973589675, now seen corresponding path program 56 times [2022-01-18 15:57:03,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:03,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595398560] [2022-01-18 15:57:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:03,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:03,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:03,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595398560] [2022-01-18 15:57:03,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595398560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:03,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865237235] [2022-01-18 15:57:03,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:57:03,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:03,130 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) [2022-01-18 15:57:03,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:57:03,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:57:03,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:03,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:03,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:03,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865237235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:03,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:03,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-01-18 15:57:03,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652231700] [2022-01-18 15:57:03,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:03,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:03,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:03,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:03,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:03,552 INFO L87 Difference]: Start difference. First operand 4305 states and 11113 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:04,389 INFO L93 Difference]: Finished difference Result 4664 states and 11802 transitions. [2022-01-18 15:57:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 15:57:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:04,395 INFO L225 Difference]: With dead ends: 4664 [2022-01-18 15:57:04,395 INFO L226 Difference]: Without dead ends: 4660 [2022-01-18 15:57:04,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 15:57:04,396 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 232 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:04,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 93 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:57:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2022-01-18 15:57:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 4305. [2022-01-18 15:57:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5810873605947955) internal successors, (11109), 4304 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11109 transitions. [2022-01-18 15:57:04,447 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11109 transitions. Word has length 32 [2022-01-18 15:57:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:04,447 INFO L470 AbstractCegarLoop]: Abstraction has 4305 states and 11109 transitions. [2022-01-18 15:57:04,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11109 transitions. [2022-01-18 15:57:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:04,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:04,451 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:04,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:04,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:04,666 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash 218195441, now seen corresponding path program 57 times [2022-01-18 15:57:04,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:04,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972441162] [2022-01-18 15:57:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:04,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:04,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:04,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972441162] [2022-01-18 15:57:04,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972441162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:04,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119659174] [2022-01-18 15:57:04,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:57:04,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:04,765 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) [2022-01-18 15:57:04,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:57:04,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 15:57:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:04,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:05,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:05,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119659174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:05,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:05,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-01-18 15:57:05,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295240878] [2022-01-18 15:57:05,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:05,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:05,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:05,194 INFO L87 Difference]: Start difference. First operand 4305 states and 11109 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:06,141 INFO L93 Difference]: Finished difference Result 5836 states and 14714 transitions. [2022-01-18 15:57:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:57:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:06,163 INFO L225 Difference]: With dead ends: 5836 [2022-01-18 15:57:06,164 INFO L226 Difference]: Without dead ends: 5818 [2022-01-18 15:57:06,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1592, Invalid=4260, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 15:57:06,164 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 318 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:06,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 147 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:06,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2022-01-18 15:57:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4428. [2022-01-18 15:57:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.5897899254574206) internal successors, (11465), 4427 states have internal predecessors, (11465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 11465 transitions. [2022-01-18 15:57:06,218 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 11465 transitions. Word has length 32 [2022-01-18 15:57:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:06,218 INFO L470 AbstractCegarLoop]: Abstraction has 4428 states and 11465 transitions. [2022-01-18 15:57:06,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 11465 transitions. [2022-01-18 15:57:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:06,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:06,222 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:06,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 15:57:06,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:06,422 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:06,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1357990529, now seen corresponding path program 58 times [2022-01-18 15:57:06,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:06,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536344662] [2022-01-18 15:57:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:06,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:06,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536344662] [2022-01-18 15:57:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536344662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082830584] [2022-01-18 15:57:06,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:57:06,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:06,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:06,489 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) [2022-01-18 15:57:06,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:57:06,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:57:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:06,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:06,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:06,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082830584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:06,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:06,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-01-18 15:57:06,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143008819] [2022-01-18 15:57:06,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:06,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:06,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:06,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:06,859 INFO L87 Difference]: Start difference. First operand 4428 states and 11465 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:07,713 INFO L93 Difference]: Finished difference Result 5254 states and 13180 transitions. [2022-01-18 15:57:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:57:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:07,719 INFO L225 Difference]: With dead ends: 5254 [2022-01-18 15:57:07,720 INFO L226 Difference]: Without dead ends: 5238 [2022-01-18 15:57:07,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1639, Invalid=4367, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:57:07,720 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 281 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:07,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 133 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:57:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2022-01-18 15:57:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 4516. [2022-01-18 15:57:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 2.5918050941306756) internal successors, (11702), 4515 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 11702 transitions. [2022-01-18 15:57:07,778 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 11702 transitions. Word has length 32 [2022-01-18 15:57:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:07,778 INFO L470 AbstractCegarLoop]: Abstraction has 4516 states and 11702 transitions. [2022-01-18 15:57:07,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 11702 transitions. [2022-01-18 15:57:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:07,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:07,785 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:07,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:08,000 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,SelfDestructingSolverStorable62 [2022-01-18 15:57:08,000 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1087164675, now seen corresponding path program 59 times [2022-01-18 15:57:08,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:08,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724116151] [2022-01-18 15:57:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:08,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:08,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724116151] [2022-01-18 15:57:08,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724116151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125436002] [2022-01-18 15:57:08,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:57:08,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:08,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:08,079 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) [2022-01-18 15:57:08,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:57:08,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 15:57:08,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:08,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:08,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125436002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:08,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:08,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-01-18 15:57:08,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251558884] [2022-01-18 15:57:08,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:08,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:08,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:08,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:08,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:08,518 INFO L87 Difference]: Start difference. First operand 4516 states and 11702 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:09,390 INFO L93 Difference]: Finished difference Result 5594 states and 13918 transitions. [2022-01-18 15:57:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:57:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:09,398 INFO L225 Difference]: With dead ends: 5594 [2022-01-18 15:57:09,398 INFO L226 Difference]: Without dead ends: 5566 [2022-01-18 15:57:09,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1652, Invalid=4510, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 15:57:09,399 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:09,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 186 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:57:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2022-01-18 15:57:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 4347. [2022-01-18 15:57:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 2.588587206626783) internal successors, (11250), 4346 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 11250 transitions. [2022-01-18 15:57:09,461 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 11250 transitions. Word has length 32 [2022-01-18 15:57:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:09,461 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 11250 transitions. [2022-01-18 15:57:09,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 11250 transitions. [2022-01-18 15:57:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:09,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:09,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:09,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:09,680 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,SelfDestructingSolverStorable63 [2022-01-18 15:57:09,681 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:09,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1534204807, now seen corresponding path program 60 times [2022-01-18 15:57:09,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:09,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674680008] [2022-01-18 15:57:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:09,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:09,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674680008] [2022-01-18 15:57:09,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674680008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739780696] [2022-01-18 15:57:09,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:57:09,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:09,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:09,770 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) [2022-01-18 15:57:09,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:57:09,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 15:57:09,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:09,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:10,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739780696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:10,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:10,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-01-18 15:57:10,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166649684] [2022-01-18 15:57:10,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:10,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:10,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:10,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:10,131 INFO L87 Difference]: Start difference. First operand 4347 states and 11250 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:10,989 INFO L93 Difference]: Finished difference Result 5720 states and 14080 transitions. [2022-01-18 15:57:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 15:57:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:11,010 INFO L225 Difference]: With dead ends: 5720 [2022-01-18 15:57:11,010 INFO L226 Difference]: Without dead ends: 5686 [2022-01-18 15:57:11,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1673, Invalid=4647, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 15:57:11,011 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:11,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 155 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:57:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-01-18 15:57:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3872. [2022-01-18 15:57:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.579178506845776) internal successors, (9984), 3871 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 9984 transitions. [2022-01-18 15:57:11,061 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 9984 transitions. Word has length 32 [2022-01-18 15:57:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:11,061 INFO L470 AbstractCegarLoop]: Abstraction has 3872 states and 9984 transitions. [2022-01-18 15:57:11,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 9984 transitions. [2022-01-18 15:57:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:11,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:11,064 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:11,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:11,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:11,265 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash 314403765, now seen corresponding path program 61 times [2022-01-18 15:57:11,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:11,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753999106] [2022-01-18 15:57:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:11,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:11,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753999106] [2022-01-18 15:57:11,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753999106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203650601] [2022-01-18 15:57:11,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:57:11,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:11,353 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) [2022-01-18 15:57:11,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:57:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:11,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:11,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203650601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:11,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:11,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-18 15:57:11,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670646327] [2022-01-18 15:57:11,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:11,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:57:11,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:57:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:57:11,721 INFO L87 Difference]: Start difference. First operand 3872 states and 9984 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:12,995 INFO L93 Difference]: Finished difference Result 5438 states and 13049 transitions. [2022-01-18 15:57:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:57:12,995 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:13,001 INFO L225 Difference]: With dead ends: 5438 [2022-01-18 15:57:13,001 INFO L226 Difference]: Without dead ends: 5438 [2022-01-18 15:57:13,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2297, Invalid=6633, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:57:13,003 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 364 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:13,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 314 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:57:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2022-01-18 15:57:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 3402. [2022-01-18 15:57:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 2.5633637165539547) internal successors, (8718), 3401 states have internal predecessors, (8718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 8718 transitions. [2022-01-18 15:57:13,050 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 8718 transitions. Word has length 32 [2022-01-18 15:57:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:13,050 INFO L470 AbstractCegarLoop]: Abstraction has 3402 states and 8718 transitions. [2022-01-18 15:57:13,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 8718 transitions. [2022-01-18 15:57:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:13,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:13,063 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:13,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 15:57:13,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:13,263 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1022655503, now seen corresponding path program 62 times [2022-01-18 15:57:13,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:13,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874498698] [2022-01-18 15:57:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:13,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:13,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874498698] [2022-01-18 15:57:13,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874498698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653543418] [2022-01-18 15:57:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:57:13,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:13,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:13,336 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) [2022-01-18 15:57:13,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:57:13,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:57:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:13,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:13,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653543418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:13,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:13,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-01-18 15:57:13,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043957685] [2022-01-18 15:57:13,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:13,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:13,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:13,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:13,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:13,719 INFO L87 Difference]: Start difference. First operand 3402 states and 8718 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:14,665 INFO L93 Difference]: Finished difference Result 4252 states and 10318 transitions. [2022-01-18 15:57:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:57:14,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:14,670 INFO L225 Difference]: With dead ends: 4252 [2022-01-18 15:57:14,670 INFO L226 Difference]: Without dead ends: 4186 [2022-01-18 15:57:14,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 15:57:14,671 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 402 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:14,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 213 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2022-01-18 15:57:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3264. [2022-01-18 15:57:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.5485749310450507) internal successors, (8316), 3263 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8316 transitions. [2022-01-18 15:57:14,713 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8316 transitions. Word has length 32 [2022-01-18 15:57:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:14,713 INFO L470 AbstractCegarLoop]: Abstraction has 3264 states and 8316 transitions. [2022-01-18 15:57:14,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8316 transitions. [2022-01-18 15:57:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:14,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:14,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:14,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:14,916 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,SelfDestructingSolverStorable66 [2022-01-18 15:57:14,916 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash -837548363, now seen corresponding path program 63 times [2022-01-18 15:57:14,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:14,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998913584] [2022-01-18 15:57:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:14,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:14,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998913584] [2022-01-18 15:57:14,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998913584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240005988] [2022-01-18 15:57:14,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:57:14,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:14,998 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) [2022-01-18 15:57:14,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:57:15,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 15:57:15,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:15,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:15,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:15,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:15,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240005988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:15,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:15,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-01-18 15:57:15,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335156279] [2022-01-18 15:57:15,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:15,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:57:15,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:57:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:57:15,374 INFO L87 Difference]: Start difference. First operand 3264 states and 8316 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:16,793 INFO L93 Difference]: Finished difference Result 5122 states and 12148 transitions. [2022-01-18 15:57:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 15:57:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:16,801 INFO L225 Difference]: With dead ends: 5122 [2022-01-18 15:57:16,801 INFO L226 Difference]: Without dead ends: 5122 [2022-01-18 15:57:16,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3795 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2888, Invalid=7618, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 15:57:16,803 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 435 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:16,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 244 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2022-01-18 15:57:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 2860. [2022-01-18 15:57:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.5183630640083945) internal successors, (7200), 2859 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 7200 transitions. [2022-01-18 15:57:16,852 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 7200 transitions. Word has length 32 [2022-01-18 15:57:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:16,852 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 7200 transitions. [2022-01-18 15:57:16,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 7200 transitions. [2022-01-18 15:57:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:16,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:16,855 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:16,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 15:57:17,055 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,SelfDestructingSolverStorable67 [2022-01-18 15:57:17,055 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:17,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -834470415, now seen corresponding path program 64 times [2022-01-18 15:57:17,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:17,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118075979] [2022-01-18 15:57:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:17,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:17,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118075979] [2022-01-18 15:57:17,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118075979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393551458] [2022-01-18 15:57:17,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:57:17,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:17,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:17,127 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) [2022-01-18 15:57:17,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:57:17,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:57:17,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:17,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:17,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393551458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:17,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:17,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-01-18 15:57:17,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738201176] [2022-01-18 15:57:17,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:17,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:17,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:17,545 INFO L87 Difference]: Start difference. First operand 2860 states and 7200 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:18,399 INFO L93 Difference]: Finished difference Result 3661 states and 8825 transitions. [2022-01-18 15:57:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:57:18,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:18,404 INFO L225 Difference]: With dead ends: 3661 [2022-01-18 15:57:18,404 INFO L226 Difference]: Without dead ends: 3622 [2022-01-18 15:57:18,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1362, Invalid=4040, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 15:57:18,405 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 283 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:18,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 211 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2022-01-18 15:57:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 2809. [2022-01-18 15:57:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 2.508190883190883) internal successors, (7043), 2808 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 7043 transitions. [2022-01-18 15:57:18,446 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 7043 transitions. Word has length 32 [2022-01-18 15:57:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:18,446 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 7043 transitions. [2022-01-18 15:57:18,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 7043 transitions. [2022-01-18 15:57:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:18,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:18,448 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:18,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 15:57:18,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:18,648 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash 341139893, now seen corresponding path program 65 times [2022-01-18 15:57:18,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443330206] [2022-01-18 15:57:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:18,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:18,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:18,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443330206] [2022-01-18 15:57:18,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443330206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:18,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695157804] [2022-01-18 15:57:18,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:57:18,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:18,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:18,737 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) [2022-01-18 15:57:18,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:57:18,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 15:57:18,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:18,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:18,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:18,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695157804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:19,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:19,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-01-18 15:57:19,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847556134] [2022-01-18 15:57:19,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:19,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:57:19,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:57:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:57:19,128 INFO L87 Difference]: Start difference. First operand 2809 states and 7043 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:20,782 INFO L93 Difference]: Finished difference Result 5194 states and 12216 transitions. [2022-01-18 15:57:20,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 15:57:20,782 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:20,789 INFO L225 Difference]: With dead ends: 5194 [2022-01-18 15:57:20,789 INFO L226 Difference]: Without dead ends: 5194 [2022-01-18 15:57:20,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5287 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3777, Invalid=9333, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 15:57:20,791 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 512 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:20,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 277 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:57:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2022-01-18 15:57:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3307. [2022-01-18 15:57:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 3306 states have (on average 2.481246218995765) internal successors, (8203), 3306 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 8203 transitions. [2022-01-18 15:57:20,850 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 8203 transitions. Word has length 32 [2022-01-18 15:57:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:20,851 INFO L470 AbstractCegarLoop]: Abstraction has 3307 states and 8203 transitions. [2022-01-18 15:57:20,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 8203 transitions. [2022-01-18 15:57:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:20,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:20,853 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:20,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 15:57:21,060 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,SelfDestructingSolverStorable69 [2022-01-18 15:57:21,060 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1427175409, now seen corresponding path program 66 times [2022-01-18 15:57:21,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:21,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996833330] [2022-01-18 15:57:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:21,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:21,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:21,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996833330] [2022-01-18 15:57:21,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996833330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:21,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329857731] [2022-01-18 15:57:21,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:57:21,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:21,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:21,167 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:21,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:57:21,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:57:21,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:21,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:21,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329857731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:21,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:21,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-01-18 15:57:21,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567468204] [2022-01-18 15:57:21,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:21,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:21,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:21,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:21,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:21,561 INFO L87 Difference]: Start difference. First operand 3307 states and 8203 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:22,367 INFO L93 Difference]: Finished difference Result 3840 states and 9263 transitions. [2022-01-18 15:57:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:57:22,368 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:22,372 INFO L225 Difference]: With dead ends: 3840 [2022-01-18 15:57:22,373 INFO L226 Difference]: Without dead ends: 3822 [2022-01-18 15:57:22,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:57:22,373 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:22,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 216 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-01-18 15:57:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3381. [2022-01-18 15:57:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 2.486094674556213) internal successors, (8403), 3380 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 8403 transitions. [2022-01-18 15:57:22,414 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 8403 transitions. Word has length 32 [2022-01-18 15:57:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:22,414 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 8403 transitions. [2022-01-18 15:57:22,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 8403 transitions. [2022-01-18 15:57:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:22,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:22,417 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:22,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:22,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:22,632 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash 556891317, now seen corresponding path program 67 times [2022-01-18 15:57:22,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:22,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97770040] [2022-01-18 15:57:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:22,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:22,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97770040] [2022-01-18 15:57:22,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97770040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029029123] [2022-01-18 15:57:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:57:22,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:22,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:22,704 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:22,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:57:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:22,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:22,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:23,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029029123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:23,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:23,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-01-18 15:57:23,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634239946] [2022-01-18 15:57:23,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:23,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:57:23,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:57:23,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:57:23,127 INFO L87 Difference]: Start difference. First operand 3381 states and 8403 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:25,005 INFO L93 Difference]: Finished difference Result 6567 states and 15776 transitions. [2022-01-18 15:57:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 15:57:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:25,015 INFO L225 Difference]: With dead ends: 6567 [2022-01-18 15:57:25,015 INFO L226 Difference]: Without dead ends: 6567 [2022-01-18 15:57:25,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7212 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4899, Invalid=12131, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 15:57:25,016 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 719 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:25,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 204 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:57:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2022-01-18 15:57:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 5144. [2022-01-18 15:57:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5143 states have (on average 2.52109663620455) internal successors, (12966), 5143 states have internal predecessors, (12966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 12966 transitions. [2022-01-18 15:57:25,095 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 12966 transitions. Word has length 32 [2022-01-18 15:57:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:25,095 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 12966 transitions. [2022-01-18 15:57:25,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 12966 transitions. [2022-01-18 15:57:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:25,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:25,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:25,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:25,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:25,303 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1389129317, now seen corresponding path program 68 times [2022-01-18 15:57:25,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:25,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735593497] [2022-01-18 15:57:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:25,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:25,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:25,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735593497] [2022-01-18 15:57:25,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735593497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:25,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518667116] [2022-01-18 15:57:25,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:57:25,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:25,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:25,369 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:25,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:57:25,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:57:25,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:25,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:25,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:25,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:25,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518667116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:25,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:25,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-01-18 15:57:25,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330106175] [2022-01-18 15:57:25,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:25,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:25,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:25,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:25,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:25,764 INFO L87 Difference]: Start difference. First operand 5144 states and 12966 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:27,006 INFO L93 Difference]: Finished difference Result 6009 states and 14677 transitions. [2022-01-18 15:57:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 15:57:27,006 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:27,013 INFO L225 Difference]: With dead ends: 6009 [2022-01-18 15:57:27,013 INFO L226 Difference]: Without dead ends: 6005 [2022-01-18 15:57:27,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2532, Invalid=6398, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:57:27,013 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 452 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:27,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 117 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-01-18 15:57:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5062. [2022-01-18 15:57:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 5061 states have (on average 2.517091483896463) internal successors, (12739), 5061 states have internal predecessors, (12739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 12739 transitions. [2022-01-18 15:57:27,080 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 12739 transitions. Word has length 32 [2022-01-18 15:57:27,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:27,080 INFO L470 AbstractCegarLoop]: Abstraction has 5062 states and 12739 transitions. [2022-01-18 15:57:27,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 12739 transitions. [2022-01-18 15:57:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:27,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:27,084 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:27,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 15:57:27,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-01-18 15:57:27,284 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1895475583, now seen corresponding path program 69 times [2022-01-18 15:57:27,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:27,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994395565] [2022-01-18 15:57:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:27,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:27,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:27,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994395565] [2022-01-18 15:57:27,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994395565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:27,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734844467] [2022-01-18 15:57:27,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:57:27,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:27,352 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:27,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:57:27,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 15:57:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:27,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:27,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734844467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:27,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:27,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-01-18 15:57:27,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685734594] [2022-01-18 15:57:27,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:27,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:27,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:27,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:27,741 INFO L87 Difference]: Start difference. First operand 5062 states and 12739 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:28,860 INFO L93 Difference]: Finished difference Result 6244 states and 15277 transitions. [2022-01-18 15:57:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:57:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:28,868 INFO L225 Difference]: With dead ends: 6244 [2022-01-18 15:57:28,868 INFO L226 Difference]: Without dead ends: 6232 [2022-01-18 15:57:28,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 15:57:28,869 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 426 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:28,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 123 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2022-01-18 15:57:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 5108. [2022-01-18 15:57:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.522811826904249) internal successors, (12884), 5107 states have internal predecessors, (12884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 12884 transitions. [2022-01-18 15:57:28,958 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 12884 transitions. Word has length 32 [2022-01-18 15:57:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:28,958 INFO L470 AbstractCegarLoop]: Abstraction has 5108 states and 12884 transitions. [2022-01-18 15:57:28,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 12884 transitions. [2022-01-18 15:57:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:28,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:28,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:28,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 15:57:29,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:29,162 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:29,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2122696963, now seen corresponding path program 70 times [2022-01-18 15:57:29,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:29,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540170869] [2022-01-18 15:57:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:29,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:29,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:29,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540170869] [2022-01-18 15:57:29,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540170869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:29,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360846636] [2022-01-18 15:57:29,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:57:29,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:29,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:29,245 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:29,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:57:29,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:57:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:29,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:29,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:29,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360846636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:29,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:29,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-01-18 15:57:29,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511762368] [2022-01-18 15:57:29,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:29,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:29,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:29,612 INFO L87 Difference]: Start difference. First operand 5108 states and 12884 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:30,665 INFO L93 Difference]: Finished difference Result 6722 states and 16413 transitions. [2022-01-18 15:57:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:57:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:30,674 INFO L225 Difference]: With dead ends: 6722 [2022-01-18 15:57:30,674 INFO L226 Difference]: Without dead ends: 6702 [2022-01-18 15:57:30,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1999, Invalid=5311, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 15:57:30,675 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 440 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:30,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 141 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2022-01-18 15:57:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 5738. [2022-01-18 15:57:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 2.5281506013595956) internal successors, (14504), 5737 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 14504 transitions. [2022-01-18 15:57:30,754 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 14504 transitions. Word has length 32 [2022-01-18 15:57:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:30,754 INFO L470 AbstractCegarLoop]: Abstraction has 5738 states and 14504 transitions. [2022-01-18 15:57:30,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 14504 transitions. [2022-01-18 15:57:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:30,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:30,759 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:30,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:30,973 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:30,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1439111047, now seen corresponding path program 71 times [2022-01-18 15:57:30,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:30,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288554250] [2022-01-18 15:57:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:30,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:31,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:31,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288554250] [2022-01-18 15:57:31,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288554250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:31,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328129715] [2022-01-18 15:57:31,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:57:31,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:31,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:31,069 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:31,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:57:31,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 15:57:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:31,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:31,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328129715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:31,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:31,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-01-18 15:57:31,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299270788] [2022-01-18 15:57:31,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:31,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:31,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:31,428 INFO L87 Difference]: Start difference. First operand 5738 states and 14504 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:32,527 INFO L93 Difference]: Finished difference Result 7634 states and 18636 transitions. [2022-01-18 15:57:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:57:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:32,540 INFO L225 Difference]: With dead ends: 7634 [2022-01-18 15:57:32,540 INFO L226 Difference]: Without dead ends: 7606 [2022-01-18 15:57:32,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1968, Invalid=5342, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 15:57:32,541 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 485 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:32,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 139 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2022-01-18 15:57:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 6549. [2022-01-18 15:57:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6549 states, 6548 states have (on average 2.5284056200366525) internal successors, (16556), 6548 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 16556 transitions. [2022-01-18 15:57:32,645 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 16556 transitions. Word has length 32 [2022-01-18 15:57:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:32,645 INFO L470 AbstractCegarLoop]: Abstraction has 6549 states and 16556 transitions. [2022-01-18 15:57:32,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 16556 transitions. [2022-01-18 15:57:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 15:57:32,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:32,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:32,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:32,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:32,850 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1643042059, now seen corresponding path program 72 times [2022-01-18 15:57:32,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:32,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308046531] [2022-01-18 15:57:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:32,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:32,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308046531] [2022-01-18 15:57:32,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308046531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187138681] [2022-01-18 15:57:32,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:57:32,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:32,929 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:32,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:57:32,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 15:57:32,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:57:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:33,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:33,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187138681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:33,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:33,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 15:57:33,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027672384] [2022-01-18 15:57:33,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:57:33,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:57:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:57:33,273 INFO L87 Difference]: Start difference. First operand 6549 states and 16556 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 15:57:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:34,175 INFO L93 Difference]: Finished difference Result 7611 states and 18726 transitions. [2022-01-18 15:57:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:57:34,175 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 15:57:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:34,185 INFO L225 Difference]: With dead ends: 7611 [2022-01-18 15:57:34,185 INFO L226 Difference]: Without dead ends: 7575 [2022-01-18 15:57:34,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1702, Invalid=4778, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 15:57:34,186 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 393 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:34,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 129 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:57:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2022-01-18 15:57:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 6635. [2022-01-18 15:57:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.537232438950859) internal successors, (16832), 6634 states have internal predecessors, (16832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 16832 transitions. [2022-01-18 15:57:34,291 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 16832 transitions. Word has length 32 [2022-01-18 15:57:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:34,291 INFO L470 AbstractCegarLoop]: Abstraction has 6635 states and 16832 transitions. [2022-01-18 15:57:34,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 15:57:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 16832 transitions. [2022-01-18 15:57:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:34,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:34,297 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:34,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 15:57:34,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 15:57:34,511 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2038373619, now seen corresponding path program 73 times [2022-01-18 15:57:34,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:34,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301701109] [2022-01-18 15:57:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:34,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:34,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301701109] [2022-01-18 15:57:34,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301701109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612130550] [2022-01-18 15:57:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:57:34,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:34,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:34,549 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:34,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:57:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:34,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:57:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:34,693 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-01-18 15:57:34,694 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 89 treesize of output 89 [2022-01-18 15:57:39,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:39,640 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 175 treesize of output 147 [2022-01-18 15:57:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:39,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:39,803 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-01-18 15:57:39,803 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 104 treesize of output 108 [2022-01-18 15:57:39,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:39,828 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 176 treesize of output 152 [2022-01-18 15:57:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:39,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612130550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:39,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:39,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-01-18 15:57:39,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382445481] [2022-01-18 15:57:39,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:39,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:57:39,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:39,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:57:39,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:57:39,909 INFO L87 Difference]: Start difference. First operand 6635 states and 16832 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:40,038 INFO L93 Difference]: Finished difference Result 7849 states and 19710 transitions. [2022-01-18 15:57:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:57:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:57:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:40,051 INFO L225 Difference]: With dead ends: 7849 [2022-01-18 15:57:40,051 INFO L226 Difference]: Without dead ends: 7842 [2022-01-18 15:57:40,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:57:40,052 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:40,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 738 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-01-18 15:57:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-01-18 15:57:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 7432. [2022-01-18 15:57:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 2.5446104158255953) internal successors, (18909), 7431 states have internal predecessors, (18909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 18909 transitions. [2022-01-18 15:57:40,176 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 18909 transitions. Word has length 34 [2022-01-18 15:57:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:40,176 INFO L470 AbstractCegarLoop]: Abstraction has 7432 states and 18909 transitions. [2022-01-18 15:57:40,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 18909 transitions. [2022-01-18 15:57:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:40,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:40,182 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:40,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 15:57:40,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:40,382 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1746623611, now seen corresponding path program 74 times [2022-01-18 15:57:40,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:40,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359462019] [2022-01-18 15:57:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:40,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:40,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:40,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359462019] [2022-01-18 15:57:40,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359462019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:40,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837187995] [2022-01-18 15:57:40,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:57:40,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:40,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:40,415 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:40,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:57:40,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:57:40,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:57:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:40,608 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-01-18 15:57:40,608 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 89 treesize of output 89 [2022-01-18 15:57:45,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:45,871 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 175 treesize of output 147 [2022-01-18 15:57:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:45,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:46,133 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-01-18 15:57:46,134 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 104 treesize of output 108 [2022-01-18 15:57:46,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:46,158 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 176 treesize of output 152 [2022-01-18 15:57:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:46,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837187995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:46,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:46,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-01-18 15:57:46,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005702653] [2022-01-18 15:57:46,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:46,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:57:46,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:57:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:57:46,252 INFO L87 Difference]: Start difference. First operand 7432 states and 18909 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:46,431 INFO L93 Difference]: Finished difference Result 7936 states and 19797 transitions. [2022-01-18 15:57:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:57:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:57:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:46,443 INFO L225 Difference]: With dead ends: 7936 [2022-01-18 15:57:46,443 INFO L226 Difference]: Without dead ends: 7933 [2022-01-18 15:57:46,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:57:46,444 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 151 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:46,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 951 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 408 Invalid, 0 Unknown, 223 Unchecked, 0.1s Time] [2022-01-18 15:57:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2022-01-18 15:57:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 7478. [2022-01-18 15:57:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7478 states, 7477 states have (on average 2.5451384245018054) internal successors, (19030), 7477 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 19030 transitions. [2022-01-18 15:57:46,560 INFO L78 Accepts]: Start accepts. Automaton has 7478 states and 19030 transitions. Word has length 34 [2022-01-18 15:57:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:46,561 INFO L470 AbstractCegarLoop]: Abstraction has 7478 states and 19030 transitions. [2022-01-18 15:57:46,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7478 states and 19030 transitions. [2022-01-18 15:57:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:46,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:46,566 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:46,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:46,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:46,781 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash 60071939, now seen corresponding path program 75 times [2022-01-18 15:57:46,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:46,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390583805] [2022-01-18 15:57:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:46,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:46,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:46,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390583805] [2022-01-18 15:57:46,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390583805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:46,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505811359] [2022-01-18 15:57:46,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:57:46,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:46,816 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:46,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:57:46,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 15:57:46,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:46,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:57:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:47,269 INFO L353 Elim1Store]: treesize reduction 409, result has 22.7 percent of original size [2022-01-18 15:57:47,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 142 treesize of output 175 [2022-01-18 15:57:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:47,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:47,600 INFO L353 Elim1Store]: treesize reduction 72, result has 40.5 percent of original size [2022-01-18 15:57:47,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 134 [2022-01-18 15:57:47,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:47,625 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 196 treesize of output 152 [2022-01-18 15:57:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:47,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505811359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:47,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:47,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-01-18 15:57:47,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488698867] [2022-01-18 15:57:47,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:47,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:57:47,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:57:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:57:47,714 INFO L87 Difference]: Start difference. First operand 7478 states and 19030 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:47,970 INFO L93 Difference]: Finished difference Result 7725 states and 19406 transitions. [2022-01-18 15:57:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:57:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:57:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:48,005 INFO L225 Difference]: With dead ends: 7725 [2022-01-18 15:57:48,006 INFO L226 Difference]: Without dead ends: 7722 [2022-01-18 15:57:48,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:57:48,006 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 145 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:48,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 693 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:57:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7722 states. [2022-01-18 15:57:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7722 to 7360. [2022-01-18 15:57:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 2.545726321511075) internal successors, (18734), 7359 states have internal predecessors, (18734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 18734 transitions. [2022-01-18 15:57:48,113 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 18734 transitions. Word has length 34 [2022-01-18 15:57:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:48,113 INFO L470 AbstractCegarLoop]: Abstraction has 7360 states and 18734 transitions. [2022-01-18 15:57:48,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 18734 transitions. [2022-01-18 15:57:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:48,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:48,119 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:48,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 15:57:48,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 15:57:48,320 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1739321357, now seen corresponding path program 76 times [2022-01-18 15:57:48,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:48,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720601730] [2022-01-18 15:57:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:48,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:57:48,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:48,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720601730] [2022-01-18 15:57:48,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720601730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:48,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437157468] [2022-01-18 15:57:48,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:57:48,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:48,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:48,352 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:48,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:57:48,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:57:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:48,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:57:48,661 INFO L353 Elim1Store]: treesize reduction 267, result has 26.8 percent of original size [2022-01-18 15:57:48,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 142 [2022-01-18 15:57:48,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:48,736 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 144 [2022-01-18 15:57:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:48,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:49,097 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-01-18 15:57:49,097 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 120 treesize of output 114 [2022-01-18 15:57:49,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:49,122 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 188 treesize of output 152 [2022-01-18 15:57:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:49,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437157468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:49,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:49,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 25 [2022-01-18 15:57:49,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906547907] [2022-01-18 15:57:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:57:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:57:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:57:49,214 INFO L87 Difference]: Start difference. First operand 7360 states and 18734 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:49,507 INFO L93 Difference]: Finished difference Result 8196 states and 20663 transitions. [2022-01-18 15:57:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:57:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:57:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:49,518 INFO L225 Difference]: With dead ends: 8196 [2022-01-18 15:57:49,518 INFO L226 Difference]: Without dead ends: 8180 [2022-01-18 15:57:49,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:57:49,518 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 163 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:49,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 983 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:57:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2022-01-18 15:57:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 7776. [2022-01-18 15:57:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 2.5569131832797427) internal successors, (19880), 7775 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 19880 transitions. [2022-01-18 15:57:49,621 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 19880 transitions. Word has length 34 [2022-01-18 15:57:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 7776 states and 19880 transitions. [2022-01-18 15:57:49,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 19880 transitions. [2022-01-18 15:57:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:49,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:49,627 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:49,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 15:57:49,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:49,827 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:49,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1003418867, now seen corresponding path program 77 times [2022-01-18 15:57:49,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:49,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914009734] [2022-01-18 15:57:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:49,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:57:49,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:49,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914009734] [2022-01-18 15:57:49,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914009734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:49,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812636961] [2022-01-18 15:57:49,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:57:49,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:49,865 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:49,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:57:49,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 15:57:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:57:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:50,108 INFO L353 Elim1Store]: treesize reduction 156, result has 35.3 percent of original size [2022-01-18 15:57:50,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 125 [2022-01-18 15:57:50,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:50,371 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 144 [2022-01-18 15:57:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:50,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:50,638 INFO L353 Elim1Store]: treesize reduction 68, result has 43.8 percent of original size [2022-01-18 15:57:50,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 128 treesize of output 134 [2022-01-18 15:57:50,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:50,664 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 202 treesize of output 152 [2022-01-18 15:57:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:50,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812636961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:50,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:50,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 24 [2022-01-18 15:57:50,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36250909] [2022-01-18 15:57:50,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:50,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:57:50,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:50,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:57:50,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:57:50,771 INFO L87 Difference]: Start difference. First operand 7776 states and 19880 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:50,994 INFO L93 Difference]: Finished difference Result 8640 states and 21906 transitions. [2022-01-18 15:57:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:57:50,994 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:57:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:51,006 INFO L225 Difference]: With dead ends: 8640 [2022-01-18 15:57:51,006 INFO L226 Difference]: Without dead ends: 8615 [2022-01-18 15:57:51,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:57:51,006 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 168 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:51,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 773 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 556 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-18 15:57:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2022-01-18 15:57:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 8091. [2022-01-18 15:57:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8091 states, 8090 states have (on average 2.5673671199011125) internal successors, (20770), 8090 states have internal predecessors, (20770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 20770 transitions. [2022-01-18 15:57:51,108 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 20770 transitions. Word has length 34 [2022-01-18 15:57:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:51,108 INFO L470 AbstractCegarLoop]: Abstraction has 8091 states and 20770 transitions. [2022-01-18 15:57:51,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 20770 transitions. [2022-01-18 15:57:51,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:51,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:51,113 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:51,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 15:57:51,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:51,315 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -333145613, now seen corresponding path program 78 times [2022-01-18 15:57:51,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27346744] [2022-01-18 15:57:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:51,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:57:51,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:51,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27346744] [2022-01-18 15:57:51,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27346744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:51,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519891773] [2022-01-18 15:57:51,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:57:51,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:51,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:51,366 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:51,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:57:51,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 15:57:51,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 15:57:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:51,685 INFO L353 Elim1Store]: treesize reduction 133, result has 35.1 percent of original size [2022-01-18 15:57:51,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 166 treesize of output 132 [2022-01-18 15:57:51,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:51,709 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 144 [2022-01-18 15:57:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:51,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:52,023 INFO L353 Elim1Store]: treesize reduction 112, result has 33.7 percent of original size [2022-01-18 15:57:52,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 128 treesize of output 150 [2022-01-18 15:57:52,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:52,049 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 196 treesize of output 152 [2022-01-18 15:57:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:52,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519891773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:52,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:52,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-01-18 15:57:52,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738621489] [2022-01-18 15:57:52,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:52,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:57:52,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:57:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:57:52,171 INFO L87 Difference]: Start difference. First operand 8091 states and 20770 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:52,448 INFO L93 Difference]: Finished difference Result 8983 states and 22909 transitions. [2022-01-18 15:57:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:57:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:57:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:52,461 INFO L225 Difference]: With dead ends: 8983 [2022-01-18 15:57:52,461 INFO L226 Difference]: Without dead ends: 8961 [2022-01-18 15:57:52,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:57:52,461 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 220 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:52,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 700 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:57:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8961 states. [2022-01-18 15:57:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8961 to 8475. [2022-01-18 15:57:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8474 states have (on average 2.577059240028322) internal successors, (21838), 8474 states have internal predecessors, (21838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 21838 transitions. [2022-01-18 15:57:52,599 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 21838 transitions. Word has length 34 [2022-01-18 15:57:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:52,599 INFO L470 AbstractCegarLoop]: Abstraction has 8475 states and 21838 transitions. [2022-01-18 15:57:52,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 21838 transitions. [2022-01-18 15:57:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:52,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:52,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:52,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 15:57:52,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:52,806 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash -576389389, now seen corresponding path program 79 times [2022-01-18 15:57:52,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:52,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666108633] [2022-01-18 15:57:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:52,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:57:52,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:52,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666108633] [2022-01-18 15:57:52,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666108633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:52,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458471121] [2022-01-18 15:57:52,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:57:52,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:52,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:52,840 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:52,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:57:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:52,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:57:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:52,998 INFO L353 Elim1Store]: treesize reduction 32, result has 64.0 percent of original size [2022-01-18 15:57:52,999 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 107 treesize of output 95 [2022-01-18 15:57:56,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:56,542 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 144 [2022-01-18 15:57:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:56,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:56,873 INFO L353 Elim1Store]: treesize reduction 164, result has 27.1 percent of original size [2022-01-18 15:57:56,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 162 [2022-01-18 15:57:56,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:57:56,900 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 196 treesize of output 152 [2022-01-18 15:57:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:57,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458471121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:57,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:57,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 22 [2022-01-18 15:57:57,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243002667] [2022-01-18 15:57:57,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:57,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:57:57,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:57:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:57:57,012 INFO L87 Difference]: Start difference. First operand 8475 states and 21838 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:57,202 INFO L93 Difference]: Finished difference Result 9614 states and 24512 transitions. [2022-01-18 15:57:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:57:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:57:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:57,215 INFO L225 Difference]: With dead ends: 9614 [2022-01-18 15:57:57,215 INFO L226 Difference]: Without dead ends: 9581 [2022-01-18 15:57:57,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:57:57,215 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:57,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 821 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 460 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-01-18 15:57:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2022-01-18 15:57:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 8919. [2022-01-18 15:57:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.588024220677282) internal successors, (23080), 8918 states have internal predecessors, (23080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23080 transitions. [2022-01-18 15:57:57,389 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23080 transitions. Word has length 34 [2022-01-18 15:57:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:57,389 INFO L470 AbstractCegarLoop]: Abstraction has 8919 states and 23080 transitions. [2022-01-18 15:57:57,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23080 transitions. [2022-01-18 15:57:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 15:57:57,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:57,394 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:57:57,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 15:57:57,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 15:57:57,595 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:57:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1889543155, now seen corresponding path program 80 times [2022-01-18 15:57:57,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:57,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96628383] [2022-01-18 15:57:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:57,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:57:57,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:57,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96628383] [2022-01-18 15:57:57,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96628383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:57,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396296672] [2022-01-18 15:57:57,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:57:57,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:57,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:57,630 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:57:57,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:57:57,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:57:57,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:57,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:57:57,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:57,768 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-01-18 15:57:57,769 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 89 treesize of output 89 [2022-01-18 15:58:03,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:58:03,067 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 175 treesize of output 147 [2022-01-18 15:58:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:58:03,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:03,319 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-01-18 15:58:03,320 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 104 treesize of output 108 [2022-01-18 15:58:03,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:58:03,344 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 176 treesize of output 152 [2022-01-18 15:58:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:58:03,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396296672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:03,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:03,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-01-18 15:58:03,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872704598] [2022-01-18 15:58:03,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:03,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:58:03,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:58:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:58:03,420 INFO L87 Difference]: Start difference. First operand 8919 states and 23080 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:03,560 INFO L93 Difference]: Finished difference Result 9812 states and 25154 transitions. [2022-01-18 15:58:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:58:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 15:58:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:03,573 INFO L225 Difference]: With dead ends: 9812 [2022-01-18 15:58:03,573 INFO L226 Difference]: Without dead ends: 9805 [2022-01-18 15:58:03,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:58:03,573 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 150 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:03,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 946 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-01-18 15:58:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2022-01-18 15:58:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9257. [2022-01-18 15:58:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9257 states, 9256 states have (on average 2.5956136560069143) internal successors, (24025), 9256 states have internal predecessors, (24025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 24025 transitions. [2022-01-18 15:58:03,715 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 24025 transitions. Word has length 34 [2022-01-18 15:58:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:03,716 INFO L470 AbstractCegarLoop]: Abstraction has 9257 states and 24025 transitions. [2022-01-18 15:58:03,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 24025 transitions. [2022-01-18 15:58:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:03,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:03,724 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:03,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 15:58:03,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:03,924 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1336215691, now seen corresponding path program 81 times [2022-01-18 15:58:03,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:03,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205008579] [2022-01-18 15:58:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:03,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:04,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205008579] [2022-01-18 15:58:04,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205008579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407494235] [2022-01-18 15:58:04,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:58:04,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:04,033 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:04,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:58:04,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 15:58:04,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:04,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:04,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:04,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407494235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:04,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:04,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-01-18 15:58:04,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857916863] [2022-01-18 15:58:04,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:04,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:58:04,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:58:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:58:04,451 INFO L87 Difference]: Start difference. First operand 9257 states and 24025 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:06,300 INFO L93 Difference]: Finished difference Result 11082 states and 27704 transitions. [2022-01-18 15:58:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 15:58:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:06,314 INFO L225 Difference]: With dead ends: 11082 [2022-01-18 15:58:06,314 INFO L226 Difference]: Without dead ends: 11082 [2022-01-18 15:58:06,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 15:58:06,316 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 333 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:06,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 235 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:58:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2022-01-18 15:58:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 8556. [2022-01-18 15:58:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8556 states, 8555 states have (on average 2.586791350087668) internal successors, (22130), 8555 states have internal predecessors, (22130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8556 states to 8556 states and 22130 transitions. [2022-01-18 15:58:06,441 INFO L78 Accepts]: Start accepts. Automaton has 8556 states and 22130 transitions. Word has length 36 [2022-01-18 15:58:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:06,441 INFO L470 AbstractCegarLoop]: Abstraction has 8556 states and 22130 transitions. [2022-01-18 15:58:06,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 8556 states and 22130 transitions. [2022-01-18 15:58:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:06,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:06,448 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:06,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 15:58:06,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:06,648 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash -550858319, now seen corresponding path program 82 times [2022-01-18 15:58:06,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639362533] [2022-01-18 15:58:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:06,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:06,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:06,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639362533] [2022-01-18 15:58:06,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639362533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:06,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941739346] [2022-01-18 15:58:06,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:58:06,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:06,776 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:06,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:58:06,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:58:06,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:06,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:07,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:07,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941739346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:07,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:07,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-01-18 15:58:07,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011958663] [2022-01-18 15:58:07,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:07,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:07,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:07,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=907, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:07,202 INFO L87 Difference]: Start difference. First operand 8556 states and 22130 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:09,243 INFO L93 Difference]: Finished difference Result 12764 states and 31601 transitions. [2022-01-18 15:58:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 15:58:09,243 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:09,265 INFO L225 Difference]: With dead ends: 12764 [2022-01-18 15:58:09,265 INFO L226 Difference]: Without dead ends: 12621 [2022-01-18 15:58:09,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4767 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3619, Invalid=11633, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 15:58:09,267 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 766 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:09,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 262 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:58:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2022-01-18 15:58:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 8919. [2022-01-18 15:58:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.585557299843014) internal successors, (23058), 8918 states have internal predecessors, (23058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23058 transitions. [2022-01-18 15:58:09,462 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23058 transitions. Word has length 36 [2022-01-18 15:58:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:09,463 INFO L470 AbstractCegarLoop]: Abstraction has 8919 states and 23058 transitions. [2022-01-18 15:58:09,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23058 transitions. [2022-01-18 15:58:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:09,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:09,495 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:09,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 15:58:09,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-18 15:58:09,696 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1782953617, now seen corresponding path program 83 times [2022-01-18 15:58:09,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:09,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657777452] [2022-01-18 15:58:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:09,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:09,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657777452] [2022-01-18 15:58:09,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657777452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539199160] [2022-01-18 15:58:09,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:58:09,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:09,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:09,786 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:09,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:58:09,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 15:58:09,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:09,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:10,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:10,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539199160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:10,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:10,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 35 [2022-01-18 15:58:10,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894993234] [2022-01-18 15:58:10,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:10,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:58:10,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:58:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:58:10,373 INFO L87 Difference]: Start difference. First operand 8919 states and 23058 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:12,958 INFO L93 Difference]: Finished difference Result 16714 states and 42009 transitions. [2022-01-18 15:58:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-18 15:58:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:12,985 INFO L225 Difference]: With dead ends: 16714 [2022-01-18 15:58:12,985 INFO L226 Difference]: Without dead ends: 16698 [2022-01-18 15:58:12,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10728 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6963, Invalid=18477, Unknown=0, NotChecked=0, Total=25440 [2022-01-18 15:58:12,988 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 871 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:12,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 258 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:58:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2022-01-18 15:58:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 11626. [2022-01-18 15:58:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.584602150537634) internal successors, (30046), 11625 states have internal predecessors, (30046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30046 transitions. [2022-01-18 15:58:13,238 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30046 transitions. Word has length 36 [2022-01-18 15:58:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:13,238 INFO L470 AbstractCegarLoop]: Abstraction has 11626 states and 30046 transitions. [2022-01-18 15:58:13,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30046 transitions. [2022-01-18 15:58:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:13,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:13,247 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:13,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 15:58:13,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:13,448 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash 399055535, now seen corresponding path program 84 times [2022-01-18 15:58:13,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:13,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558714121] [2022-01-18 15:58:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:13,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:13,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:13,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558714121] [2022-01-18 15:58:13,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558714121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:13,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569776193] [2022-01-18 15:58:13,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:58:13,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:13,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:13,540 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:13,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:58:13,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 15:58:13,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:13,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:13,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:14,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569776193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:14,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:14,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-01-18 15:58:14,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827124487] [2022-01-18 15:58:14,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:14,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:14,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:14,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:14,053 INFO L87 Difference]: Start difference. First operand 11626 states and 30046 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:15,299 INFO L93 Difference]: Finished difference Result 12191 states and 31159 transitions. [2022-01-18 15:58:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 15:58:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:15,317 INFO L225 Difference]: With dead ends: 12191 [2022-01-18 15:58:15,318 INFO L226 Difference]: Without dead ends: 12187 [2022-01-18 15:58:15,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:58:15,319 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 231 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:15,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 111 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12187 states. [2022-01-18 15:58:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12187 to 11626. [2022-01-18 15:58:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.5839139784946235) internal successors, (30038), 11625 states have internal predecessors, (30038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30038 transitions. [2022-01-18 15:58:15,526 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30038 transitions. Word has length 36 [2022-01-18 15:58:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:15,526 INFO L470 AbstractCegarLoop]: Abstraction has 11626 states and 30038 transitions. [2022-01-18 15:58:15,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30038 transitions. [2022-01-18 15:58:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:15,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:15,535 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:15,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 15:58:15,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:15,735 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1668365135, now seen corresponding path program 85 times [2022-01-18 15:58:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:15,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441144512] [2022-01-18 15:58:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:15,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:15,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:15,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441144512] [2022-01-18 15:58:15,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441144512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:15,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150622134] [2022-01-18 15:58:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:58:15,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:15,852 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:15,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:58:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:16,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:16,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150622134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:16,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:16,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-01-18 15:58:16,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780556767] [2022-01-18 15:58:16,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:16,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:16,368 INFO L87 Difference]: Start difference. First operand 11626 states and 30038 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:17,873 INFO L93 Difference]: Finished difference Result 15216 states and 38818 transitions. [2022-01-18 15:58:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 15:58:17,874 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:17,903 INFO L225 Difference]: With dead ends: 15216 [2022-01-18 15:58:17,903 INFO L226 Difference]: Without dead ends: 15195 [2022-01-18 15:58:17,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2669, Invalid=7231, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 15:58:17,905 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 319 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:17,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 203 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:58:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15195 states. [2022-01-18 15:58:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15195 to 11850. [2022-01-18 15:58:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 2.593467803190143) internal successors, (30730), 11849 states have internal predecessors, (30730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 30730 transitions. [2022-01-18 15:58:18,157 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 30730 transitions. Word has length 36 [2022-01-18 15:58:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:18,157 INFO L470 AbstractCegarLoop]: Abstraction has 11850 states and 30730 transitions. [2022-01-18 15:58:18,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 30730 transitions. [2022-01-18 15:58:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:18,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:18,167 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:18,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 15:58:18,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 15:58:18,367 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -528570047, now seen corresponding path program 86 times [2022-01-18 15:58:18,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203719414] [2022-01-18 15:58:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:18,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:18,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203719414] [2022-01-18 15:58:18,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203719414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:18,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013577467] [2022-01-18 15:58:18,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:58:18,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:18,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:18,446 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:18,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:58:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:58:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:18,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:18,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013577467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:18,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:18,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-01-18 15:58:18,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510586575] [2022-01-18 15:58:18,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:18,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:18,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:18,898 INFO L87 Difference]: Start difference. First operand 11850 states and 30730 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:20,200 INFO L93 Difference]: Finished difference Result 13259 states and 33760 transitions. [2022-01-18 15:58:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 15:58:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:20,222 INFO L225 Difference]: With dead ends: 13259 [2022-01-18 15:58:20,222 INFO L226 Difference]: Without dead ends: 13241 [2022-01-18 15:58:20,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2558, Invalid=6948, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 15:58:20,223 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 343 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:20,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 211 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13241 states. [2022-01-18 15:58:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13241 to 12104. [2022-01-18 15:58:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5956374452615054) internal successors, (31415), 12103 states have internal predecessors, (31415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31415 transitions. [2022-01-18 15:58:20,405 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31415 transitions. Word has length 36 [2022-01-18 15:58:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:20,405 INFO L470 AbstractCegarLoop]: Abstraction has 12104 states and 31415 transitions. [2022-01-18 15:58:20,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31415 transitions. [2022-01-18 15:58:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:20,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:20,414 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:20,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 15:58:20,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:20,614 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2092355907, now seen corresponding path program 87 times [2022-01-18 15:58:20,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288430037] [2022-01-18 15:58:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:20,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:20,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288430037] [2022-01-18 15:58:20,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288430037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641179731] [2022-01-18 15:58:20,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:58:20,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:20,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:20,724 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:20,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:58:20,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-18 15:58:20,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:20,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:21,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:21,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641179731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:21,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:21,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-01-18 15:58:21,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000620814] [2022-01-18 15:58:21,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:21,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:21,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:21,250 INFO L87 Difference]: Start difference. First operand 12104 states and 31415 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:22,592 INFO L93 Difference]: Finished difference Result 13923 states and 35275 transitions. [2022-01-18 15:58:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:58:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:22,614 INFO L225 Difference]: With dead ends: 13923 [2022-01-18 15:58:22,615 INFO L226 Difference]: Without dead ends: 13889 [2022-01-18 15:58:22,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2571, Invalid=7131, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 15:58:22,616 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 296 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:22,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 237 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-01-18 15:58:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 11939. [2022-01-18 15:58:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11939 states, 11938 states have (on average 2.5983414307254145) internal successors, (31019), 11938 states have internal predecessors, (31019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11939 states to 11939 states and 31019 transitions. [2022-01-18 15:58:22,798 INFO L78 Accepts]: Start accepts. Automaton has 11939 states and 31019 transitions. Word has length 36 [2022-01-18 15:58:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:22,798 INFO L470 AbstractCegarLoop]: Abstraction has 11939 states and 31019 transitions. [2022-01-18 15:58:22,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 11939 states and 31019 transitions. [2022-01-18 15:58:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:22,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:22,806 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:22,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 15:58:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:23,007 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:23,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1652013767, now seen corresponding path program 88 times [2022-01-18 15:58:23,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:23,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112596284] [2022-01-18 15:58:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:23,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:23,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:23,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112596284] [2022-01-18 15:58:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112596284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:23,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54973337] [2022-01-18 15:58:23,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:58:23,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:23,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:23,102 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:23,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:58:23,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:58:23,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:23,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:23,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54973337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:23,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:23,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-01-18 15:58:23,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532298370] [2022-01-18 15:58:23,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:23,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:23,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:23,542 INFO L87 Difference]: Start difference. First operand 11939 states and 31019 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:24,845 INFO L93 Difference]: Finished difference Result 14229 states and 35822 transitions. [2022-01-18 15:58:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 15:58:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:24,868 INFO L225 Difference]: With dead ends: 14229 [2022-01-18 15:58:24,868 INFO L226 Difference]: Without dead ends: 14185 [2022-01-18 15:58:24,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2592, Invalid=7308, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 15:58:24,868 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 360 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:24,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 179 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2022-01-18 15:58:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 11149. [2022-01-18 15:58:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 2.601184068891281) internal successors, (28998), 11148 states have internal predecessors, (28998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 28998 transitions. [2022-01-18 15:58:25,089 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 28998 transitions. Word has length 36 [2022-01-18 15:58:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:25,089 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 28998 transitions. [2022-01-18 15:58:25,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 28998 transitions. [2022-01-18 15:58:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:25,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:25,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:25,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 15:58:25,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:25,297 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash 609987765, now seen corresponding path program 89 times [2022-01-18 15:58:25,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:25,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170721658] [2022-01-18 15:58:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:25,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:25,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:25,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170721658] [2022-01-18 15:58:25,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170721658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:25,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448310131] [2022-01-18 15:58:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:58:25,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:25,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:25,388 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:25,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:58:25,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 15:58:25,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:25,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:25,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:25,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448310131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:25,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:25,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-01-18 15:58:25,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768738195] [2022-01-18 15:58:25,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:25,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:25,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:25,816 INFO L87 Difference]: Start difference. First operand 11149 states and 28998 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:27,064 INFO L93 Difference]: Finished difference Result 13990 states and 34960 transitions. [2022-01-18 15:58:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 15:58:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:27,084 INFO L225 Difference]: With dead ends: 13990 [2022-01-18 15:58:27,084 INFO L226 Difference]: Without dead ends: 13948 [2022-01-18 15:58:27,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2621, Invalid=7479, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 15:58:27,086 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 403 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:27,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 166 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13948 states. [2022-01-18 15:58:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13948 to 9962. [2022-01-18 15:58:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 2.597731151490814) internal successors, (25876), 9961 states have internal predecessors, (25876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 25876 transitions. [2022-01-18 15:58:27,287 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 25876 transitions. Word has length 36 [2022-01-18 15:58:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:27,287 INFO L470 AbstractCegarLoop]: Abstraction has 9962 states and 25876 transitions. [2022-01-18 15:58:27,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 25876 transitions. [2022-01-18 15:58:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:27,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:27,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:27,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 15:58:27,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-01-18 15:58:27,494 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash -759696523, now seen corresponding path program 90 times [2022-01-18 15:58:27,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17527154] [2022-01-18 15:58:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:27,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:27,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:27,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17527154] [2022-01-18 15:58:27,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17527154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:27,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218479816] [2022-01-18 15:58:27,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:58:27,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:27,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:27,598 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:27,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:58:27,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 15:58:27,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:27,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:27,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:28,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218479816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:28,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:28,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-01-18 15:58:28,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833682697] [2022-01-18 15:58:28,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:28,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:58:28,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:58:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:58:28,030 INFO L87 Difference]: Start difference. First operand 9962 states and 25876 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:29,908 INFO L93 Difference]: Finished difference Result 12761 states and 31459 transitions. [2022-01-18 15:58:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 15:58:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:29,927 INFO L225 Difference]: With dead ends: 12761 [2022-01-18 15:58:29,927 INFO L226 Difference]: Without dead ends: 12761 [2022-01-18 15:58:29,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4585 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3550, Invalid=10730, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 15:58:29,929 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 392 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:29,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 335 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:58:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12761 states. [2022-01-18 15:58:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12761 to 8944. [2022-01-18 15:58:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.5896231689589624) internal successors, (23159), 8943 states have internal predecessors, (23159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 23159 transitions. [2022-01-18 15:58:30,059 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 23159 transitions. Word has length 36 [2022-01-18 15:58:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:30,059 INFO L470 AbstractCegarLoop]: Abstraction has 8944 states and 23159 transitions. [2022-01-18 15:58:30,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 23159 transitions. [2022-01-18 15:58:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:30,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:30,065 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:30,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 15:58:30,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:30,265 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1478431567, now seen corresponding path program 91 times [2022-01-18 15:58:30,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997797497] [2022-01-18 15:58:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:30,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:30,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:30,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997797497] [2022-01-18 15:58:30,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997797497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:30,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315548107] [2022-01-18 15:58:30,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:58:30,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:30,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:30,363 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:30,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:58:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:30,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:30,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:30,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315548107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:30,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:30,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-01-18 15:58:30,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322883406] [2022-01-18 15:58:30,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:30,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:30,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:30,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:30,798 INFO L87 Difference]: Start difference. First operand 8944 states and 23159 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:32,308 INFO L93 Difference]: Finished difference Result 10626 states and 26434 transitions. [2022-01-18 15:58:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 15:58:32,308 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:32,323 INFO L225 Difference]: With dead ends: 10626 [2022-01-18 15:58:32,323 INFO L226 Difference]: Without dead ends: 10527 [2022-01-18 15:58:32,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3546 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 15:58:32,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 503 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:32,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 233 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2022-01-18 15:58:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 8656. [2022-01-18 15:58:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 2.577007510109763) internal successors, (22304), 8655 states have internal predecessors, (22304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 22304 transitions. [2022-01-18 15:58:32,471 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 22304 transitions. Word has length 36 [2022-01-18 15:58:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:32,471 INFO L470 AbstractCegarLoop]: Abstraction has 8656 states and 22304 transitions. [2022-01-18 15:58:32,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 22304 transitions. [2022-01-18 15:58:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:32,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:32,477 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:32,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 15:58:32,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:32,677 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1608257675, now seen corresponding path program 92 times [2022-01-18 15:58:32,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056601379] [2022-01-18 15:58:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:32,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:32,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056601379] [2022-01-18 15:58:32,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056601379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132919107] [2022-01-18 15:58:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:58:32,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:32,782 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:32,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:58:32,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:58:32,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:33,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:33,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132919107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:33,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:33,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-01-18 15:58:33,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004137577] [2022-01-18 15:58:33,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:33,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:58:33,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:58:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:58:33,259 INFO L87 Difference]: Start difference. First operand 8656 states and 22304 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:35,258 INFO L93 Difference]: Finished difference Result 12072 states and 29459 transitions. [2022-01-18 15:58:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 15:58:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:35,275 INFO L225 Difference]: With dead ends: 12072 [2022-01-18 15:58:35,275 INFO L226 Difference]: Without dead ends: 12072 [2022-01-18 15:58:35,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5867 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4278, Invalid=11978, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 15:58:35,276 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 495 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:35,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 309 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:58:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12072 states. [2022-01-18 15:58:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12072 to 7769. [2022-01-18 15:58:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7769 states, 7768 states have (on average 2.5607621009268797) internal successors, (19892), 7768 states have internal predecessors, (19892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 19892 transitions. [2022-01-18 15:58:35,412 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 19892 transitions. Word has length 36 [2022-01-18 15:58:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:35,412 INFO L470 AbstractCegarLoop]: Abstraction has 7769 states and 19892 transitions. [2022-01-18 15:58:35,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 19892 transitions. [2022-01-18 15:58:35,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:35,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:35,417 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:35,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 15:58:35,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:35,618 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:35,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1349650353, now seen corresponding path program 93 times [2022-01-18 15:58:35,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:35,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469686577] [2022-01-18 15:58:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:35,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:35,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469686577] [2022-01-18 15:58:35,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469686577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104252750] [2022-01-18 15:58:35,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:58:35,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:35,717 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:35,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:58:35,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 15:58:35,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:35,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:35,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:35,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:36,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104252750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:36,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:36,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-01-18 15:58:36,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968414667] [2022-01-18 15:58:36,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:36,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:36,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:36,163 INFO L87 Difference]: Start difference. First operand 7769 states and 19892 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:37,444 INFO L93 Difference]: Finished difference Result 9358 states and 23204 transitions. [2022-01-18 15:58:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 15:58:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:37,457 INFO L225 Difference]: With dead ends: 9358 [2022-01-18 15:58:37,458 INFO L226 Difference]: Without dead ends: 9292 [2022-01-18 15:58:37,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2308, Invalid=7198, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 15:58:37,459 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 401 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:37,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 290 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9292 states. [2022-01-18 15:58:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9292 to 7746. [2022-01-18 15:58:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7746 states, 7745 states have (on average 2.5536475145255) internal successors, (19778), 7745 states have internal predecessors, (19778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 19778 transitions. [2022-01-18 15:58:37,590 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 19778 transitions. Word has length 36 [2022-01-18 15:58:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:37,590 INFO L470 AbstractCegarLoop]: Abstraction has 7746 states and 19778 transitions. [2022-01-18 15:58:37,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 19778 transitions. [2022-01-18 15:58:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:37,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:37,596 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:37,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 15:58:37,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:37,796 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1872827531, now seen corresponding path program 94 times [2022-01-18 15:58:37,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58144148] [2022-01-18 15:58:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:37,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:37,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:37,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58144148] [2022-01-18 15:58:37,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58144148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:37,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186406677] [2022-01-18 15:58:37,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:58:37,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:37,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:37,900 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:37,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:58:37,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:58:37,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:37,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:37,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:38,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:38,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186406677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:38,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:38,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-01-18 15:58:38,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957226873] [2022-01-18 15:58:38,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:38,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:58:38,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:58:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:58:38,379 INFO L87 Difference]: Start difference. First operand 7746 states and 19778 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:40,633 INFO L93 Difference]: Finished difference Result 11687 states and 28283 transitions. [2022-01-18 15:58:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 15:58:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:40,648 INFO L225 Difference]: With dead ends: 11687 [2022-01-18 15:58:40,648 INFO L226 Difference]: Without dead ends: 11687 [2022-01-18 15:58:40,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7992 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5519, Invalid=14221, Unknown=0, NotChecked=0, Total=19740 [2022-01-18 15:58:40,651 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 517 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:40,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 339 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:58:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11687 states. [2022-01-18 15:58:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11687 to 7094. [2022-01-18 15:58:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 7093 states have (on average 2.531791907514451) internal successors, (17958), 7093 states have internal predecessors, (17958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 17958 transitions. [2022-01-18 15:58:40,780 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 17958 transitions. Word has length 36 [2022-01-18 15:58:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:40,781 INFO L470 AbstractCegarLoop]: Abstraction has 7094 states and 17958 transitions. [2022-01-18 15:58:40,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 17958 transitions. [2022-01-18 15:58:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:40,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:40,785 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:40,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 15:58:40,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-18 15:58:40,986 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1869749583, now seen corresponding path program 95 times [2022-01-18 15:58:40,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:40,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64920582] [2022-01-18 15:58:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:40,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:41,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:41,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64920582] [2022-01-18 15:58:41,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64920582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:41,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743921991] [2022-01-18 15:58:41,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:58:41,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:41,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:41,072 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:41,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:58:41,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 15:58:41,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:41,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:41,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743921991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:41,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:41,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-01-18 15:58:41,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540862149] [2022-01-18 15:58:41,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:41,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:41,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:41,522 INFO L87 Difference]: Start difference. First operand 7094 states and 17958 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:42,697 INFO L93 Difference]: Finished difference Result 8391 states and 20772 transitions. [2022-01-18 15:58:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 15:58:42,697 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:42,707 INFO L225 Difference]: With dead ends: 8391 [2022-01-18 15:58:42,707 INFO L226 Difference]: Without dead ends: 8352 [2022-01-18 15:58:42,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2137, Invalid=6419, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 15:58:42,709 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 336 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:42,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 232 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:58:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2022-01-18 15:58:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7183. [2022-01-18 15:58:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7183 states, 7182 states have (on average 2.532442216652743) internal successors, (18188), 7182 states have internal predecessors, (18188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 18188 transitions. [2022-01-18 15:58:42,819 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 18188 transitions. Word has length 36 [2022-01-18 15:58:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:42,819 INFO L470 AbstractCegarLoop]: Abstraction has 7183 states and 18188 transitions. [2022-01-18 15:58:42,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 18188 transitions. [2022-01-18 15:58:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:42,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:42,823 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:42,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 15:58:43,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 15:58:43,024 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:43,025 INFO L85 PathProgramCache]: Analyzing trace with hash 187230069, now seen corresponding path program 96 times [2022-01-18 15:58:43,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:43,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291753589] [2022-01-18 15:58:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:43,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:43,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291753589] [2022-01-18 15:58:43,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291753589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142664274] [2022-01-18 15:58:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:58:43,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:43,116 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:43,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:58:43,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 15:58:43,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:43,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:43,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142664274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:43,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:43,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2022-01-18 15:58:43,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577623179] [2022-01-18 15:58:43,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:43,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:58:43,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:43,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:58:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:58:43,618 INFO L87 Difference]: Start difference. First operand 7183 states and 18188 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:46,214 INFO L93 Difference]: Finished difference Result 12422 states and 29912 transitions. [2022-01-18 15:58:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-18 15:58:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:46,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:46,234 INFO L225 Difference]: With dead ends: 12422 [2022-01-18 15:58:46,234 INFO L226 Difference]: Without dead ends: 12422 [2022-01-18 15:58:46,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10582 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6986, Invalid=17194, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 15:58:46,237 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 673 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:46,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 279 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:58:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12422 states. [2022-01-18 15:58:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12422 to 8770. [2022-01-18 15:58:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 2.5070133424563803) internal successors, (21984), 8769 states have internal predecessors, (21984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 21984 transitions. [2022-01-18 15:58:46,426 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 21984 transitions. Word has length 36 [2022-01-18 15:58:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:46,426 INFO L470 AbstractCegarLoop]: Abstraction has 8770 states and 21984 transitions. [2022-01-18 15:58:46,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 21984 transitions. [2022-01-18 15:58:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:46,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:46,433 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:46,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 15:58:46,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 15:58:46,633 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1273265585, now seen corresponding path program 97 times [2022-01-18 15:58:46,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:46,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990762591] [2022-01-18 15:58:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:46,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:46,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990762591] [2022-01-18 15:58:46,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990762591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895211848] [2022-01-18 15:58:46,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:58:46,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:46,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:46,727 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:46,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:58:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:46,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:47,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:47,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895211848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:47,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:47,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-01-18 15:58:47,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394092090] [2022-01-18 15:58:47,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:47,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:47,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:47,230 INFO L87 Difference]: Start difference. First operand 8770 states and 21984 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:48,418 INFO L93 Difference]: Finished difference Result 9544 states and 23558 transitions. [2022-01-18 15:58:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 15:58:48,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:48,432 INFO L225 Difference]: With dead ends: 9544 [2022-01-18 15:58:48,432 INFO L226 Difference]: Without dead ends: 9526 [2022-01-18 15:58:48,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2065, Invalid=5945, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 15:58:48,433 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:48,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 260 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:58:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2022-01-18 15:58:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 8902. [2022-01-18 15:58:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8902 states, 8901 states have (on average 2.510055049994383) internal successors, (22342), 8901 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8902 states to 8902 states and 22342 transitions. [2022-01-18 15:58:48,568 INFO L78 Accepts]: Start accepts. Automaton has 8902 states and 22342 transitions. Word has length 36 [2022-01-18 15:58:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:48,568 INFO L470 AbstractCegarLoop]: Abstraction has 8902 states and 22342 transitions. [2022-01-18 15:58:48,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 8902 states and 22342 transitions. [2022-01-18 15:58:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:48,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:48,574 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:48,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 15:58:48,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:48,779 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:48,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1749148533, now seen corresponding path program 98 times [2022-01-18 15:58:48,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:48,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606293417] [2022-01-18 15:58:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:48,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:48,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606293417] [2022-01-18 15:58:48,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606293417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502630824] [2022-01-18 15:58:48,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:58:48,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:48,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:48,865 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:48,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:58:48,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:58:48,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:49,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502630824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:49,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:49,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 35 [2022-01-18 15:58:49,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622118343] [2022-01-18 15:58:49,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:49,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:58:49,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:58:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:58:49,401 INFO L87 Difference]: Start difference. First operand 8902 states and 22342 transitions. Second operand has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:52,354 INFO L93 Difference]: Finished difference Result 15970 states and 39092 transitions. [2022-01-18 15:58:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-18 15:58:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:52,379 INFO L225 Difference]: With dead ends: 15970 [2022-01-18 15:58:52,379 INFO L226 Difference]: Without dead ends: 15970 [2022-01-18 15:58:52,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13560 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8543, Invalid=21559, Unknown=0, NotChecked=0, Total=30102 [2022-01-18 15:58:52,382 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 735 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:52,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 253 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:58:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15970 states. [2022-01-18 15:58:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15970 to 13330. [2022-01-18 15:58:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13330 states, 13329 states have (on average 2.5292219971490733) internal successors, (33712), 13329 states have internal predecessors, (33712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13330 states to 13330 states and 33712 transitions. [2022-01-18 15:58:52,623 INFO L78 Accepts]: Start accepts. Automaton has 13330 states and 33712 transitions. Word has length 36 [2022-01-18 15:58:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:52,624 INFO L470 AbstractCegarLoop]: Abstraction has 13330 states and 33712 transitions. [2022-01-18 15:58:52,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 13330 states and 33712 transitions. [2022-01-18 15:58:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:52,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:52,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:52,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 15:58:52,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 15:58:52,832 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash -196872101, now seen corresponding path program 99 times [2022-01-18 15:58:52,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:52,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820146757] [2022-01-18 15:58:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:52,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:52,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:52,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820146757] [2022-01-18 15:58:52,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820146757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:52,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096501004] [2022-01-18 15:58:52,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:58:52,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:52,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:52,907 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:52,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:58:52,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 15:58:52,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:52,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:52,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:53,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:53,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096501004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:53,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:53,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-01-18 15:58:53,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020350777] [2022-01-18 15:58:53,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:53,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:53,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:53,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:53,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:53,415 INFO L87 Difference]: Start difference. First operand 13330 states and 33712 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:55,240 INFO L93 Difference]: Finished difference Result 14924 states and 36958 transitions. [2022-01-18 15:58:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 15:58:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:55,264 INFO L225 Difference]: With dead ends: 14924 [2022-01-18 15:58:55,264 INFO L226 Difference]: Without dead ends: 14920 [2022-01-18 15:58:55,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4135, Invalid=10627, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 15:58:55,266 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 547 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:55,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 120 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:58:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14920 states. [2022-01-18 15:58:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14920 to 13086. [2022-01-18 15:58:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13086 states, 13085 states have (on average 2.525792892625143) internal successors, (33050), 13085 states have internal predecessors, (33050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13086 states to 13086 states and 33050 transitions. [2022-01-18 15:58:55,499 INFO L78 Accepts]: Start accepts. Automaton has 13086 states and 33050 transitions. Word has length 36 [2022-01-18 15:58:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:55,499 INFO L470 AbstractCegarLoop]: Abstraction has 13086 states and 33050 transitions. [2022-01-18 15:58:55,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13086 states and 33050 transitions. [2022-01-18 15:58:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:55,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:55,507 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:55,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 15:58:55,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 15:58:55,707 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash -703218367, now seen corresponding path program 100 times [2022-01-18 15:58:55,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:55,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053696322] [2022-01-18 15:58:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:55,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:55,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:55,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053696322] [2022-01-18 15:58:55,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053696322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:55,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918743843] [2022-01-18 15:58:55,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:58:55,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:55,793 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:55,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:58:55,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:58:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:56,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:56,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918743843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:56,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:56,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-01-18 15:58:56,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122798083] [2022-01-18 15:58:56,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:56,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:56,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:56,281 INFO L87 Difference]: Start difference. First operand 13086 states and 33050 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:57,981 INFO L93 Difference]: Finished difference Result 15282 states and 37884 transitions. [2022-01-18 15:58:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 15:58:57,982 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:58:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:58:58,003 INFO L225 Difference]: With dead ends: 15282 [2022-01-18 15:58:58,003 INFO L226 Difference]: Without dead ends: 15270 [2022-01-18 15:58:58,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4339 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3530, Invalid=9352, Unknown=0, NotChecked=0, Total=12882 [2022-01-18 15:58:58,005 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:58:58,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 138 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:58:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15270 states. [2022-01-18 15:58:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15270 to 13017. [2022-01-18 15:58:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13017 states, 13016 states have (on average 2.528272894898586) internal successors, (32908), 13016 states have internal predecessors, (32908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13017 states to 13017 states and 32908 transitions. [2022-01-18 15:58:58,245 INFO L78 Accepts]: Start accepts. Automaton has 13017 states and 32908 transitions. Word has length 36 [2022-01-18 15:58:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:58,245 INFO L470 AbstractCegarLoop]: Abstraction has 13017 states and 32908 transitions. [2022-01-18 15:58:58,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13017 states and 32908 transitions. [2022-01-18 15:58:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:58:58,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:58,253 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:58:58,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 15:58:58,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:58,453 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:58:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:58,453 INFO L85 PathProgramCache]: Analyzing trace with hash -930439747, now seen corresponding path program 101 times [2022-01-18 15:58:58,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:58,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388684345] [2022-01-18 15:58:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:58,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:58:58,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388684345] [2022-01-18 15:58:58,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388684345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223913166] [2022-01-18 15:58:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:58:58,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:58,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:58,541 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:58:58,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:58:58,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 15:58:58,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:58,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:58,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:58,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:58:59,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223913166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:59,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:59,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-01-18 15:58:59,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329791582] [2022-01-18 15:58:59,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:59,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:58:59,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:58:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:58:59,021 INFO L87 Difference]: Start difference. First operand 13017 states and 32908 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:59:00,568 INFO L93 Difference]: Finished difference Result 16039 states and 39737 transitions. [2022-01-18 15:59:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 15:59:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:59:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:59:00,595 INFO L225 Difference]: With dead ends: 16039 [2022-01-18 15:59:00,595 INFO L226 Difference]: Without dead ends: 16019 [2022-01-18 15:59:00,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3172, Invalid=8600, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 15:59:00,597 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:59:00,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 154 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:59:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2022-01-18 15:59:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 13397. [2022-01-18 15:59:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13397 states, 13396 states have (on average 2.5326216781128696) internal successors, (33927), 13396 states have internal predecessors, (33927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13397 states to 13397 states and 33927 transitions. [2022-01-18 15:59:00,861 INFO L78 Accepts]: Start accepts. Automaton has 13397 states and 33927 transitions. Word has length 36 [2022-01-18 15:59:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:59:00,861 INFO L470 AbstractCegarLoop]: Abstraction has 13397 states and 33927 transitions. [2022-01-18 15:59:00,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 13397 states and 33927 transitions. [2022-01-18 15:59:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:59:00,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:59:00,870 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:59:00,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 15:59:01,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:01,071 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:59:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:59:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash -246853831, now seen corresponding path program 102 times [2022-01-18 15:59:01,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:59:01,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526651271] [2022-01-18 15:59:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:59:01,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:59:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:59:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:59:01,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:59:01,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526651271] [2022-01-18 15:59:01,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526651271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:59:01,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714811962] [2022-01-18 15:59:01,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:59:01,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:01,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:59:01,158 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:59:01,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:59:01,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 15:59:01,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:59:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:59:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:59:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:01,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:59:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:01,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714811962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:59:01,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:59:01,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-01-18 15:59:01,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458705672] [2022-01-18 15:59:01,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:59:01,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:59:01,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:59:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:59:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:59:01,598 INFO L87 Difference]: Start difference. First operand 13397 states and 33927 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:59:03,205 INFO L93 Difference]: Finished difference Result 17468 states and 43250 transitions. [2022-01-18 15:59:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 15:59:03,205 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:59:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:59:03,238 INFO L225 Difference]: With dead ends: 17468 [2022-01-18 15:59:03,238 INFO L226 Difference]: Without dead ends: 17440 [2022-01-18 15:59:03,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3628 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3021, Invalid=8321, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 15:59:03,240 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 539 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:59:03,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 146 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:59:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17440 states. [2022-01-18 15:59:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17440 to 15583. [2022-01-18 15:59:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15583 states, 15582 states have (on average 2.5360672570915157) internal successors, (39517), 15582 states have internal predecessors, (39517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15583 states to 15583 states and 39517 transitions. [2022-01-18 15:59:03,581 INFO L78 Accepts]: Start accepts. Automaton has 15583 states and 39517 transitions. Word has length 36 [2022-01-18 15:59:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:59:03,581 INFO L470 AbstractCegarLoop]: Abstraction has 15583 states and 39517 transitions. [2022-01-18 15:59:03,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 15583 states and 39517 transitions. [2022-01-18 15:59:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:59:03,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:59:03,592 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:59:03,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 15:59:03,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 15:59:03,793 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:59:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:59:03,793 INFO L85 PathProgramCache]: Analyzing trace with hash -450784843, now seen corresponding path program 103 times [2022-01-18 15:59:03,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:59:03,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270766816] [2022-01-18 15:59:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:59:03,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:59:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:59:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:59:03,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:59:03,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270766816] [2022-01-18 15:59:03,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270766816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:59:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673997030] [2022-01-18 15:59:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:59:03,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:59:03,908 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:59:03,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:59:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:59:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:59:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:59:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:04,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:59:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:04,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673997030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:59:04,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:59:04,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-01-18 15:59:04,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97814601] [2022-01-18 15:59:04,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:59:04,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:59:04,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:59:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:59:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:59:04,413 INFO L87 Difference]: Start difference. First operand 15583 states and 39517 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:59:05,911 INFO L93 Difference]: Finished difference Result 20026 states and 49571 transitions. [2022-01-18 15:59:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 15:59:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:59:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:59:05,942 INFO L225 Difference]: With dead ends: 20026 [2022-01-18 15:59:05,943 INFO L226 Difference]: Without dead ends: 19990 [2022-01-18 15:59:05,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3723 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3034, Invalid=8522, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 15:59:05,944 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 600 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:59:05,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 132 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:59:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19990 states. [2022-01-18 15:59:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19990 to 17983. [2022-01-18 15:59:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17983 states, 17982 states have (on average 2.533644755866978) internal successors, (45560), 17982 states have internal predecessors, (45560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17983 states to 17983 states and 45560 transitions. [2022-01-18 15:59:06,294 INFO L78 Accepts]: Start accepts. Automaton has 17983 states and 45560 transitions. Word has length 36 [2022-01-18 15:59:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:59:06,294 INFO L470 AbstractCegarLoop]: Abstraction has 17983 states and 45560 transitions. [2022-01-18 15:59:06,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 17983 states and 45560 transitions. [2022-01-18 15:59:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 15:59:06,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:59:06,305 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:59:06,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 15:59:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:06,506 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:59:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:59:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1140008241, now seen corresponding path program 104 times [2022-01-18 15:59:06,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:59:06,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416398751] [2022-01-18 15:59:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:59:06,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:59:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:59:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:06,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:59:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416398751] [2022-01-18 15:59:06,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416398751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:59:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084599524] [2022-01-18 15:59:06,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:59:06,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:59:06,604 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:59:06,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:59:06,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:59:06,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:59:06,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:59:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:59:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:06,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:59:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:07,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084599524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:59:07,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:59:07,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-01-18 15:59:07,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354678048] [2022-01-18 15:59:07,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:59:07,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:59:07,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:59:07,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:59:07,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:59:07,015 INFO L87 Difference]: Start difference. First operand 17983 states and 45560 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:59:08,335 INFO L93 Difference]: Finished difference Result 19957 states and 49654 transitions. [2022-01-18 15:59:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 15:59:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 15:59:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:59:08,374 INFO L225 Difference]: With dead ends: 19957 [2022-01-18 15:59:08,374 INFO L226 Difference]: Without dead ends: 19913 [2022-01-18 15:59:08,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2658, Invalid=7644, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 15:59:08,375 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 412 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:59:08,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 167 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:59:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19913 states. [2022-01-18 15:59:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19913 to 18106. [2022-01-18 15:59:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18106 states, 18105 states have (on average 2.5389671361502346) internal successors, (45968), 18105 states have internal predecessors, (45968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18106 states to 18106 states and 45968 transitions. [2022-01-18 15:59:08,680 INFO L78 Accepts]: Start accepts. Automaton has 18106 states and 45968 transitions. Word has length 36 [2022-01-18 15:59:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:59:08,681 INFO L470 AbstractCegarLoop]: Abstraction has 18106 states and 45968 transitions. [2022-01-18 15:59:08,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 18106 states and 45968 transitions. [2022-01-18 15:59:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 15:59:08,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:59:08,693 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:59:08,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 15:59:08,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:08,899 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:59:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:59:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash -830876749, now seen corresponding path program 105 times [2022-01-18 15:59:08,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:59:08,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452676846] [2022-01-18 15:59:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:59:08,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:59:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:59:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:08,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:59:08,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452676846] [2022-01-18 15:59:08,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452676846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:59:08,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244253167] [2022-01-18 15:59:08,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:59:08,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:08,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:59:08,943 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:59:08,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:59:08,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 15:59:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:59:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:59:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:59:09,392 INFO L353 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2022-01-18 15:59:09,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 175 treesize of output 155 [2022-01-18 15:59:17,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:59:17,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-01-18 15:59:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:17,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:59:17,564 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-01-18 15:59:17,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-01-18 15:59:17,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:59:17,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-01-18 15:59:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:17,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244253167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:59:17,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:59:17,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-01-18 15:59:17,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003682693] [2022-01-18 15:59:17,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:59:17,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:59:17,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:59:17,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:59:17,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:59:17,917 INFO L87 Difference]: Start difference. First operand 18106 states and 45968 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:59:18,275 INFO L93 Difference]: Finished difference Result 20472 states and 51856 transitions. [2022-01-18 15:59:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:59:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 15:59:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:59:18,312 INFO L225 Difference]: With dead ends: 20472 [2022-01-18 15:59:18,312 INFO L226 Difference]: Without dead ends: 20465 [2022-01-18 15:59:18,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:59:18,312 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 157 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:59:18,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1012 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 763 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-01-18 15:59:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20465 states. [2022-01-18 15:59:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20465 to 19592. [2022-01-18 15:59:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 19591 states have (on average 2.5449951508345667) internal successors, (49859), 19591 states have internal predecessors, (49859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 49859 transitions. [2022-01-18 15:59:18,681 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 49859 transitions. Word has length 38 [2022-01-18 15:59:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:59:18,681 INFO L470 AbstractCegarLoop]: Abstraction has 19592 states and 49859 transitions. [2022-01-18 15:59:18,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 49859 transitions. [2022-01-18 15:59:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 15:59:18,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:59:18,694 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:59:18,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 15:59:18,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-01-18 15:59:18,894 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:59:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:59:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash 515847431, now seen corresponding path program 106 times [2022-01-18 15:59:18,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:59:18,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108274140] [2022-01-18 15:59:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:59:18,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:59:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:59:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:18,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:59:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108274140] [2022-01-18 15:59:18,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108274140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:59:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924839065] [2022-01-18 15:59:18,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:59:18,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:59:18,935 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:59:18,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:59:18,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:59:18,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:59:18,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 15:59:18,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:59:19,125 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-01-18 15:59:19,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2022-01-18 16:00:14,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:14,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-01-18 16:00:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:00:14,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:00:15,139 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-01-18 16:00:15,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-01-18 16:00:15,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:15,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-01-18 16:00:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:00:15,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924839065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:00:15,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:00:15,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-01-18 16:00:15,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326181619] [2022-01-18 16:00:15,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:00:15,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:00:15,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:00:15,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:00:15,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:00:15,449 INFO L87 Difference]: Start difference. First operand 19592 states and 49859 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:00:15,727 INFO L93 Difference]: Finished difference Result 20311 states and 51220 transitions. [2022-01-18 16:00:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 16:00:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:00:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:00:15,761 INFO L225 Difference]: With dead ends: 20311 [2022-01-18 16:00:15,761 INFO L226 Difference]: Without dead ends: 20308 [2022-01-18 16:00:15,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:00:15,762 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 197 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:00:15,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1322 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 601 Invalid, 0 Unknown, 239 Unchecked, 0.2s Time] [2022-01-18 16:00:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20308 states. [2022-01-18 16:00:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20308 to 19572. [2022-01-18 16:00:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19572 states, 19571 states have (on average 2.545552092381585) internal successors, (49819), 19571 states have internal predecessors, (49819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19572 states to 19572 states and 49819 transitions. [2022-01-18 16:00:16,225 INFO L78 Accepts]: Start accepts. Automaton has 19572 states and 49819 transitions. Word has length 38 [2022-01-18 16:00:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:00:16,225 INFO L470 AbstractCegarLoop]: Abstraction has 19572 states and 49819 transitions. [2022-01-18 16:00:16,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 19572 states and 49819 transitions. [2022-01-18 16:00:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:00:16,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:00:16,238 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:00:16,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 16:00:16,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:16,439 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:00:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:00:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1165761971, now seen corresponding path program 107 times [2022-01-18 16:00:16,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:00:16,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514793598] [2022-01-18 16:00:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:00:16,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:00:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:00:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:00:16,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:00:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514793598] [2022-01-18 16:00:16,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514793598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:00:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416781288] [2022-01-18 16:00:16,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:00:16,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:00:16,483 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:00:16,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 16:00:16,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:00:16,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:00:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:00:16,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:00:16,975 INFO L353 Elim1Store]: treesize reduction 454, result has 28.1 percent of original size [2022-01-18 16:00:16,976 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 15 new quantified variables, introduced 45 case distinctions, treesize of input 148 treesize of output 235 [2022-01-18 16:00:17,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:17,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 271 treesize of output 211 [2022-01-18 16:00:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:17,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:00:17,468 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-01-18 16:00:17,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 152 [2022-01-18 16:00:17,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:17,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 308 treesize of output 220 [2022-01-18 16:00:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:17,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416781288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:00:17,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:00:17,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-01-18 16:00:17,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661163176] [2022-01-18 16:00:17,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:00:17,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:00:17,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:00:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:00:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:00:17,810 INFO L87 Difference]: Start difference. First operand 19572 states and 49819 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:00:18,241 INFO L93 Difference]: Finished difference Result 20956 states and 53113 transitions. [2022-01-18 16:00:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:00:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:00:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:00:18,278 INFO L225 Difference]: With dead ends: 20956 [2022-01-18 16:00:18,278 INFO L226 Difference]: Without dead ends: 20940 [2022-01-18 16:00:18,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:00:18,279 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 186 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:00:18,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1180 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:00:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20940 states. [2022-01-18 16:00:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20940 to 20358. [2022-01-18 16:00:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20358 states, 20357 states have (on average 2.5531758117600827) internal successors, (51975), 20357 states have internal predecessors, (51975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20358 states to 20358 states and 51975 transitions. [2022-01-18 16:00:18,662 INFO L78 Accepts]: Start accepts. Automaton has 20358 states and 51975 transitions. Word has length 38 [2022-01-18 16:00:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:00:18,663 INFO L470 AbstractCegarLoop]: Abstraction has 20358 states and 51975 transitions. [2022-01-18 16:00:18,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 20358 states and 51975 transitions. [2022-01-18 16:00:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:00:18,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:00:18,677 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:00:18,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 16:00:18,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 16:00:18,877 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:00:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:00:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash 494904243, now seen corresponding path program 108 times [2022-01-18 16:00:18,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:00:18,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851322675] [2022-01-18 16:00:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:00:18,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:00:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:00:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:00:18,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:00:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851322675] [2022-01-18 16:00:18,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851322675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:00:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062052789] [2022-01-18 16:00:18,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:00:18,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:18,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:00:18,918 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:00:18,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 16:00:18,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 16:00:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:00:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:00:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:00:19,432 INFO L353 Elim1Store]: treesize reduction 399, result has 26.2 percent of original size [2022-01-18 16:00:19,433 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 16 new quantified variables, introduced 45 case distinctions, treesize of input 213 treesize of output 210 [2022-01-18 16:00:19,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:19,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 231 treesize of output 211 [2022-01-18 16:00:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:19,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:00:19,937 INFO L353 Elim1Store]: treesize reduction 148, result has 34.2 percent of original size [2022-01-18 16:00:19,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 204 treesize of output 198 [2022-01-18 16:00:19,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:19,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-01-18 16:00:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:20,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062052789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:00:20,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:00:20,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-01-18 16:00:20,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681566784] [2022-01-18 16:00:20,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:00:20,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:00:20,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:00:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:00:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:00:20,167 INFO L87 Difference]: Start difference. First operand 20358 states and 51975 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:00:20,545 INFO L93 Difference]: Finished difference Result 21454 states and 54680 transitions. [2022-01-18 16:00:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:00:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:00:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:00:20,587 INFO L225 Difference]: With dead ends: 21454 [2022-01-18 16:00:20,587 INFO L226 Difference]: Without dead ends: 21436 [2022-01-18 16:00:20,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:00:20,588 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 176 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:00:20,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 930 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:00:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21436 states. [2022-01-18 16:00:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21436 to 20898. [2022-01-18 16:00:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20898 states, 20897 states have (on average 2.5599368330382353) internal successors, (53495), 20897 states have internal predecessors, (53495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20898 states to 20898 states and 53495 transitions. [2022-01-18 16:00:20,934 INFO L78 Accepts]: Start accepts. Automaton has 20898 states and 53495 transitions. Word has length 38 [2022-01-18 16:00:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:00:20,934 INFO L470 AbstractCegarLoop]: Abstraction has 20898 states and 53495 transitions. [2022-01-18 16:00:20,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20898 states and 53495 transitions. [2022-01-18 16:00:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:00:20,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:00:20,948 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:00:20,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 16:00:21,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:21,149 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:00:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:00:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash 45722035, now seen corresponding path program 109 times [2022-01-18 16:00:21,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:00:21,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666371390] [2022-01-18 16:00:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:00:21,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:00:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:00:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:00:21,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:00:21,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666371390] [2022-01-18 16:00:21,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666371390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:00:21,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680849777] [2022-01-18 16:00:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:00:21,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:21,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:00:21,191 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:00:21,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 16:00:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:00:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:00:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:00:21,497 INFO L353 Elim1Store]: treesize reduction 188, result has 39.2 percent of original size [2022-01-18 16:00:21,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 160 treesize of output 169 [2022-01-18 16:00:22,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:22,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 211 [2022-01-18 16:00:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:22,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:00:22,697 INFO L353 Elim1Store]: treesize reduction 144, result has 36.0 percent of original size [2022-01-18 16:00:22,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 172 treesize of output 196 [2022-01-18 16:00:22,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:22,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-01-18 16:00:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:22,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680849777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:00:22,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:00:22,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 28 [2022-01-18 16:00:22,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826116775] [2022-01-18 16:00:22,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:00:22,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:00:22,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:00:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:00:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:00:22,903 INFO L87 Difference]: Start difference. First operand 20898 states and 53495 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:00:23,296 INFO L93 Difference]: Finished difference Result 22471 states and 57365 transitions. [2022-01-18 16:00:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:00:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:00:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:00:23,330 INFO L225 Difference]: With dead ends: 22471 [2022-01-18 16:00:23,331 INFO L226 Difference]: Without dead ends: 22442 [2022-01-18 16:00:23,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:00:23,331 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 208 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:00:23,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1295 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 863 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-01-18 16:00:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22442 states. [2022-01-18 16:00:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22442 to 21528. [2022-01-18 16:00:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21528 states, 21527 states have (on average 2.5663585265016025) internal successors, (55246), 21527 states have internal predecessors, (55246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21528 states to 21528 states and 55246 transitions. [2022-01-18 16:00:23,685 INFO L78 Accepts]: Start accepts. Automaton has 21528 states and 55246 transitions. Word has length 38 [2022-01-18 16:00:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:00:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 21528 states and 55246 transitions. [2022-01-18 16:00:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 21528 states and 55246 transitions. [2022-01-18 16:00:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:00:23,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:00:23,700 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:00:23,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 16:00:23,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 16:00:23,901 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:00:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:00:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2121650253, now seen corresponding path program 110 times [2022-01-18 16:00:23,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:00:23,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593485230] [2022-01-18 16:00:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:00:23,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:00:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:00:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:00:23,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:00:23,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593485230] [2022-01-18 16:00:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593485230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:00:23,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644988935] [2022-01-18 16:00:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:00:23,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:23,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:00:23,942 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:00:23,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 16:00:23,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:00:23,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:00:23,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:00:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:00:24,195 INFO L353 Elim1Store]: treesize reduction 103, result has 49.8 percent of original size [2022-01-18 16:00:24,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 154 treesize of output 148 [2022-01-18 16:00:27,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:27,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 183 treesize of output 211 [2022-01-18 16:00:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:00:27,681 INFO L353 Elim1Store]: treesize reduction 204, result has 29.4 percent of original size [2022-01-18 16:00:27,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 168 treesize of output 212 [2022-01-18 16:00:27,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:27,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-01-18 16:00:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:27,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644988935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:00:27,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:00:27,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 27 [2022-01-18 16:00:27,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065987707] [2022-01-18 16:00:27,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:00:27,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:00:27,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:00:27,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:00:27,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:00:27,912 INFO L87 Difference]: Start difference. First operand 21528 states and 55246 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:00:28,275 INFO L93 Difference]: Finished difference Result 23233 states and 59432 transitions. [2022-01-18 16:00:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:00:28,275 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:00:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:00:28,318 INFO L225 Difference]: With dead ends: 23233 [2022-01-18 16:00:28,319 INFO L226 Difference]: Without dead ends: 23200 [2022-01-18 16:00:28,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:00:28,319 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 205 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:00:28,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1412 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 769 Invalid, 0 Unknown, 239 Unchecked, 0.3s Time] [2022-01-18 16:00:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23200 states. [2022-01-18 16:00:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23200 to 22204. [2022-01-18 16:00:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22204 states, 22203 states have (on average 2.572535242985182) internal successors, (57118), 22203 states have internal predecessors, (57118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22204 states to 22204 states and 57118 transitions. [2022-01-18 16:00:28,806 INFO L78 Accepts]: Start accepts. Automaton has 22204 states and 57118 transitions. Word has length 38 [2022-01-18 16:00:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:00:28,806 INFO L470 AbstractCegarLoop]: Abstraction has 22204 states and 57118 transitions. [2022-01-18 16:00:28,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 22204 states and 57118 transitions. [2022-01-18 16:00:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:00:28,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:00:28,822 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:00:28,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 16:00:29,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 16:00:29,022 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:00:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:00:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1907280461, now seen corresponding path program 111 times [2022-01-18 16:00:29,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:00:29,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479994982] [2022-01-18 16:00:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:00:29,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:00:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:00:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:00:29,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:00:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479994982] [2022-01-18 16:00:29,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479994982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:00:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465026119] [2022-01-18 16:00:29,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:00:29,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:00:29,070 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:00:29,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 16:00:29,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 16:00:29,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:00:29,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 16:00:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:00:29,520 INFO L353 Elim1Store]: treesize reduction 98, result has 45.9 percent of original size [2022-01-18 16:00:29,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 201 treesize of output 163 [2022-01-18 16:00:29,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:29,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 297 treesize of output 211 [2022-01-18 16:00:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:29,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:00:30,450 INFO L353 Elim1Store]: treesize reduction 272, result has 24.7 percent of original size [2022-01-18 16:00:30,450 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 156 treesize of output 224 [2022-01-18 16:00:30,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:00:30,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 326 treesize of output 220 [2022-01-18 16:00:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:00:30,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465026119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:00:30,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:00:30,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-01-18 16:00:30,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868143838] [2022-01-18 16:00:30,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:00:30,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:00:30,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:00:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:00:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:00:30,706 INFO L87 Difference]: Start difference. First operand 22204 states and 57118 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:00:31,158 INFO L93 Difference]: Finished difference Result 23839 states and 61167 transitions. [2022-01-18 16:00:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:00:31,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:00:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:00:31,196 INFO L225 Difference]: With dead ends: 23839 [2022-01-18 16:00:31,196 INFO L226 Difference]: Without dead ends: 23809 [2022-01-18 16:00:31,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:00:31,196 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 215 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:00:31,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1229 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:00:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2022-01-18 16:00:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 22942. [2022-01-18 16:00:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22942 states, 22941 states have (on average 2.580489080685236) internal successors, (59199), 22941 states have internal predecessors, (59199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22942 states to 22942 states and 59199 transitions. [2022-01-18 16:00:31,696 INFO L78 Accepts]: Start accepts. Automaton has 22942 states and 59199 transitions. Word has length 38 [2022-01-18 16:00:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:00:31,696 INFO L470 AbstractCegarLoop]: Abstraction has 22942 states and 59199 transitions. [2022-01-18 16:00:31,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 22942 states and 59199 transitions. [2022-01-18 16:00:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:00:31,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:00:31,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:00:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 16:00:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-01-18 16:00:31,924 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:00:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:00:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2056340557, now seen corresponding path program 112 times [2022-01-18 16:00:31,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:00:31,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490192737] [2022-01-18 16:00:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:00:31,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:00:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:00:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:00:31,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:00:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490192737] [2022-01-18 16:00:31,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490192737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:00:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365745294] [2022-01-18 16:00:31,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:00:31,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:00:31,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:00:31,966 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:00:31,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 16:00:32,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:00:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:00:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:00:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:00:32,191 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-01-18 16:00:32,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2022-01-18 16:01:26,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:01:26,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-01-18 16:01:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:01:26,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:26,649 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-01-18 16:01:26,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-01-18 16:01:26,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:01:26,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-01-18 16:01:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:01:27,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365745294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:27,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:27,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-01-18 16:01:27,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396903726] [2022-01-18 16:01:27,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:27,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:01:27,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:01:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:01:27,010 INFO L87 Difference]: Start difference. First operand 22942 states and 59199 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:27,285 INFO L93 Difference]: Finished difference Result 24194 states and 62052 transitions. [2022-01-18 16:01:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 16:01:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:01:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:27,327 INFO L225 Difference]: With dead ends: 24194 [2022-01-18 16:01:27,327 INFO L226 Difference]: Without dead ends: 24187 [2022-01-18 16:01:27,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:01:27,328 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 221 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:27,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1264 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 473 Invalid, 0 Unknown, 434 Unchecked, 0.2s Time] [2022-01-18 16:01:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24187 states. [2022-01-18 16:01:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24187 to 23411. [2022-01-18 16:01:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23411 states, 23410 states have (on average 2.5850918410935497) internal successors, (60517), 23410 states have internal predecessors, (60517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23411 states to 23411 states and 60517 transitions. [2022-01-18 16:01:27,749 INFO L78 Accepts]: Start accepts. Automaton has 23411 states and 60517 transitions. Word has length 38 [2022-01-18 16:01:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:27,749 INFO L470 AbstractCegarLoop]: Abstraction has 23411 states and 60517 transitions. [2022-01-18 16:01:27,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 23411 states and 60517 transitions. [2022-01-18 16:01:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:27,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:27,768 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:27,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 16:01:27,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 16:01:27,969 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash 654351669, now seen corresponding path program 113 times [2022-01-18 16:01:27,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:27,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439751448] [2022-01-18 16:01:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:27,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:28,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439751448] [2022-01-18 16:01:28,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439751448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528377937] [2022-01-18 16:01:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:01:28,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:28,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:28,103 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:28,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 16:01:28,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:01:28,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:28,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:28,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:28,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:28,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528377937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:28,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:28,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-01-18 16:01:28,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344517128] [2022-01-18 16:01:28,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:28,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:01:28,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:01:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:01:28,620 INFO L87 Difference]: Start difference. First operand 23411 states and 60517 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:31,369 INFO L93 Difference]: Finished difference Result 26391 states and 66661 transitions. [2022-01-18 16:01:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 16:01:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:31,416 INFO L225 Difference]: With dead ends: 26391 [2022-01-18 16:01:31,416 INFO L226 Difference]: Without dead ends: 26391 [2022-01-18 16:01:31,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6946 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 16:01:31,418 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 353 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:31,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 341 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:01:31,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2022-01-18 16:01:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21896. [2022-01-18 16:01:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21896 states, 21895 states have (on average 2.5780771865722767) internal successors, (56447), 21895 states have internal predecessors, (56447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21896 states to 21896 states and 56447 transitions. [2022-01-18 16:01:31,796 INFO L78 Accepts]: Start accepts. Automaton has 21896 states and 56447 transitions. Word has length 40 [2022-01-18 16:01:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:31,797 INFO L470 AbstractCegarLoop]: Abstraction has 21896 states and 56447 transitions. [2022-01-18 16:01:31,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 21896 states and 56447 transitions. [2022-01-18 16:01:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:31,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:31,815 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:31,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 16:01:32,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:32,015 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:32,015 INFO L85 PathProgramCache]: Analyzing trace with hash -531457935, now seen corresponding path program 114 times [2022-01-18 16:01:32,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:32,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073955875] [2022-01-18 16:01:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:32,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:32,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073955875] [2022-01-18 16:01:32,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073955875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916324382] [2022-01-18 16:01:32,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:01:32,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:32,139 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:32,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 16:01:32,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:01:32,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:32,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:32,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916324382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:32,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:32,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-01-18 16:01:32,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728423755] [2022-01-18 16:01:32,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:32,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:01:32,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:01:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:01:32,677 INFO L87 Difference]: Start difference. First operand 21896 states and 56447 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:35,664 INFO L93 Difference]: Finished difference Result 30410 states and 76384 transitions. [2022-01-18 16:01:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 16:01:35,665 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:35,723 INFO L225 Difference]: With dead ends: 30410 [2022-01-18 16:01:35,724 INFO L226 Difference]: Without dead ends: 30222 [2022-01-18 16:01:35,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8143 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5686, Invalid=19120, Unknown=0, NotChecked=0, Total=24806 [2022-01-18 16:01:35,725 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1015 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:35,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 277 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:01:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30222 states. [2022-01-18 16:01:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30222 to 22632. [2022-01-18 16:01:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22632 states, 22631 states have (on average 2.5780124607838806) internal successors, (58343), 22631 states have internal predecessors, (58343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22632 states to 22632 states and 58343 transitions. [2022-01-18 16:01:36,237 INFO L78 Accepts]: Start accepts. Automaton has 22632 states and 58343 transitions. Word has length 40 [2022-01-18 16:01:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:36,237 INFO L470 AbstractCegarLoop]: Abstraction has 22632 states and 58343 transitions. [2022-01-18 16:01:36,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22632 states and 58343 transitions. [2022-01-18 16:01:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:36,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:36,254 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:36,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 16:01:36,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:36,455 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash -23690603, now seen corresponding path program 115 times [2022-01-18 16:01:36,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:36,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411079936] [2022-01-18 16:01:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:36,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:36,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:36,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411079936] [2022-01-18 16:01:36,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411079936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:36,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980152102] [2022-01-18 16:01:36,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:01:36,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:36,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:36,556 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:36,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 16:01:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:36,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:37,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980152102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:37,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:37,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 40 [2022-01-18 16:01:37,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220190250] [2022-01-18 16:01:37,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:37,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:01:37,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:37,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:01:37,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:01:37,219 INFO L87 Difference]: Start difference. First operand 22632 states and 58343 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:40,859 INFO L93 Difference]: Finished difference Result 40562 states and 102826 transitions. [2022-01-18 16:01:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-18 16:01:40,859 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:40,933 INFO L225 Difference]: With dead ends: 40562 [2022-01-18 16:01:40,933 INFO L226 Difference]: Without dead ends: 40542 [2022-01-18 16:01:40,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19087 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11545, Invalid=31097, Unknown=0, NotChecked=0, Total=42642 [2022-01-18 16:01:40,937 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 859 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:40,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 289 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:01:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40542 states. [2022-01-18 16:01:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40542 to 29497. [2022-01-18 16:01:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29497 states, 29496 states have (on average 2.577230810957418) internal successors, (76018), 29496 states have internal predecessors, (76018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29497 states to 29497 states and 76018 transitions. [2022-01-18 16:01:41,719 INFO L78 Accepts]: Start accepts. Automaton has 29497 states and 76018 transitions. Word has length 40 [2022-01-18 16:01:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:41,719 INFO L470 AbstractCegarLoop]: Abstraction has 29497 states and 76018 transitions. [2022-01-18 16:01:41,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 29497 states and 76018 transitions. [2022-01-18 16:01:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:41,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:41,737 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:41,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 16:01:41,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:41,939 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:41,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:41,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1407588685, now seen corresponding path program 116 times [2022-01-18 16:01:41,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:41,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927110828] [2022-01-18 16:01:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:41,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:42,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927110828] [2022-01-18 16:01:42,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927110828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630577541] [2022-01-18 16:01:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:01:42,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:42,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:42,045 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:42,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 16:01:42,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:01:42,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:42,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:42,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:42,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630577541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:42,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:42,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-01-18 16:01:42,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523603889] [2022-01-18 16:01:42,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:42,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:01:42,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:42,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:01:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:01:42,635 INFO L87 Difference]: Start difference. First operand 29497 states and 76018 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:44,414 INFO L93 Difference]: Finished difference Result 30394 states and 77833 transitions. [2022-01-18 16:01:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 16:01:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:44,464 INFO L225 Difference]: With dead ends: 30394 [2022-01-18 16:01:44,465 INFO L226 Difference]: Without dead ends: 30390 [2022-01-18 16:01:44,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 16:01:44,466 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 278 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:44,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 140 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:01:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30390 states. [2022-01-18 16:01:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30390 to 29497. [2022-01-18 16:01:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29497 states, 29496 states have (on average 2.5766883645240033) internal successors, (76002), 29496 states have internal predecessors, (76002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29497 states to 29497 states and 76002 transitions. [2022-01-18 16:01:45,054 INFO L78 Accepts]: Start accepts. Automaton has 29497 states and 76002 transitions. Word has length 40 [2022-01-18 16:01:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:45,054 INFO L470 AbstractCegarLoop]: Abstraction has 29497 states and 76002 transitions. [2022-01-18 16:01:45,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 29497 states and 76002 transitions. [2022-01-18 16:01:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:45,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:45,074 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:45,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 16:01:45,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:45,275 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1612029327, now seen corresponding path program 117 times [2022-01-18 16:01:45,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:45,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640338128] [2022-01-18 16:01:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:45,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 53 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:01:45,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640338128] [2022-01-18 16:01:45,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640338128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159590731] [2022-01-18 16:01:45,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:01:45,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:45,369 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:45,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 16:01:45,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:01:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:45,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:45,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159590731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:45,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:45,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-01-18 16:01:45,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146065725] [2022-01-18 16:01:45,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:45,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:01:45,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:01:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1203, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:01:45,990 INFO L87 Difference]: Start difference. First operand 29497 states and 76002 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:48,088 INFO L93 Difference]: Finished difference Result 37584 states and 96225 transitions. [2022-01-18 16:01:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 16:01:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:48,153 INFO L225 Difference]: With dead ends: 37584 [2022-01-18 16:01:48,153 INFO L226 Difference]: Without dead ends: 37560 [2022-01-18 16:01:48,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5072 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4219, Invalid=11531, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 16:01:48,155 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 528 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:48,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 217 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:01:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37560 states. [2022-01-18 16:01:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37560 to 29719. [2022-01-18 16:01:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29719 states, 29718 states have (on average 2.5852345379904436) internal successors, (76828), 29718 states have internal predecessors, (76828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29719 states to 29719 states and 76828 transitions. [2022-01-18 16:01:48,790 INFO L78 Accepts]: Start accepts. Automaton has 29719 states and 76828 transitions. Word has length 40 [2022-01-18 16:01:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:48,790 INFO L470 AbstractCegarLoop]: Abstraction has 29719 states and 76828 transitions. [2022-01-18 16:01:48,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 29719 states and 76828 transitions. [2022-01-18 16:01:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:48,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:48,807 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:48,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 16:01:49,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:49,008 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash -472234239, now seen corresponding path program 118 times [2022-01-18 16:01:49,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841080651] [2022-01-18 16:01:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:49,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:49,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841080651] [2022-01-18 16:01:49,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841080651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080004974] [2022-01-18 16:01:49,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:01:49,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:49,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:49,101 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 16:01:49,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:01:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:49,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:49,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:49,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080004974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:49,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:49,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-01-18 16:01:49,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927908398] [2022-01-18 16:01:49,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:49,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:01:49,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:01:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:01:49,652 INFO L87 Difference]: Start difference. First operand 29719 states and 76828 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:51,537 INFO L93 Difference]: Finished difference Result 32131 states and 82168 transitions. [2022-01-18 16:01:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:01:51,538 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:51,593 INFO L225 Difference]: With dead ends: 32131 [2022-01-18 16:01:51,593 INFO L226 Difference]: Without dead ends: 32111 [2022-01-18 16:01:51,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4501 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3804, Invalid=10476, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 16:01:51,595 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 388 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:51,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 277 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:01:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32111 states. [2022-01-18 16:01:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32111 to 30307. [2022-01-18 16:01:52,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30307 states, 30306 states have (on average 2.587045469543985) internal successors, (78403), 30306 states have internal predecessors, (78403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30307 states to 30307 states and 78403 transitions. [2022-01-18 16:01:52,214 INFO L78 Accepts]: Start accepts. Automaton has 30307 states and 78403 transitions. Word has length 40 [2022-01-18 16:01:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:52,214 INFO L470 AbstractCegarLoop]: Abstraction has 30307 states and 78403 transitions. [2022-01-18 16:01:52,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30307 states and 78403 transitions. [2022-01-18 16:01:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:52,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:52,233 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:52,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 16:01:52,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 16:01:52,433 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1148637827, now seen corresponding path program 119 times [2022-01-18 16:01:52,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:52,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767268815] [2022-01-18 16:01:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:52,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:52,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:52,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767268815] [2022-01-18 16:01:52,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767268815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:52,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324460833] [2022-01-18 16:01:52,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:01:52,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:52,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:52,528 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:52,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 16:01:52,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 16:01:52,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:52,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:53,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324460833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:53,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:53,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-01-18 16:01:53,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391758230] [2022-01-18 16:01:53,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:53,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:01:53,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:01:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:01:53,074 INFO L87 Difference]: Start difference. First operand 30307 states and 78403 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:54,853 INFO L93 Difference]: Finished difference Result 33401 states and 85130 transitions. [2022-01-18 16:01:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 16:01:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:54,910 INFO L225 Difference]: With dead ends: 33401 [2022-01-18 16:01:54,910 INFO L226 Difference]: Without dead ends: 33361 [2022-01-18 16:01:54,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3817, Invalid=10703, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 16:01:54,912 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 407 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:54,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 241 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:01:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33361 states. [2022-01-18 16:01:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33361 to 30181. [2022-01-18 16:01:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30181 states, 30180 states have (on average 2.591186216037111) internal successors, (78202), 30180 states have internal predecessors, (78202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30181 states to 30181 states and 78202 transitions. [2022-01-18 16:01:55,565 INFO L78 Accepts]: Start accepts. Automaton has 30181 states and 78202 transitions. Word has length 40 [2022-01-18 16:01:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:55,565 INFO L470 AbstractCegarLoop]: Abstraction has 30181 states and 78202 transitions. [2022-01-18 16:01:55,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30181 states and 78202 transitions. [2022-01-18 16:01:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:55,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:55,585 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:55,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 16:01:55,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 16:01:55,785 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1662543097, now seen corresponding path program 120 times [2022-01-18 16:01:55,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593857464] [2022-01-18 16:01:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:55,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:55,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:55,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593857464] [2022-01-18 16:01:55,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593857464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:55,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284069709] [2022-01-18 16:01:55,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:01:55,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:55,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:55,882 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:55,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 16:01:55,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-18 16:01:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:56,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284069709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:56,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:56,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-01-18 16:01:56,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123495735] [2022-01-18 16:01:56,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:56,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:01:56,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:01:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:01:56,420 INFO L87 Difference]: Start difference. First operand 30181 states and 78202 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:01:58,214 INFO L93 Difference]: Finished difference Result 33916 states and 86143 transitions. [2022-01-18 16:01:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:01:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:01:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:01:58,281 INFO L225 Difference]: With dead ends: 33916 [2022-01-18 16:01:58,281 INFO L226 Difference]: Without dead ends: 33862 [2022-01-18 16:01:58,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3838, Invalid=10924, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 16:01:58,283 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 494 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:01:58,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 259 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:01:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2022-01-18 16:01:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 28876. [2022-01-18 16:01:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28876 states, 28875 states have (on average 2.596987012987013) internal successors, (74988), 28875 states have internal predecessors, (74988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28876 states to 28876 states and 74988 transitions. [2022-01-18 16:01:59,036 INFO L78 Accepts]: Start accepts. Automaton has 28876 states and 74988 transitions. Word has length 40 [2022-01-18 16:01:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:59,037 INFO L470 AbstractCegarLoop]: Abstraction has 28876 states and 74988 transitions. [2022-01-18 16:01:59,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 28876 states and 74988 transitions. [2022-01-18 16:01:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:01:59,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:59,055 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:01:59,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 16:01:59,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 16:01:59,256 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:01:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1672981877, now seen corresponding path program 121 times [2022-01-18 16:01:59,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:59,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475124373] [2022-01-18 16:01:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:59,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:59,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:59,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475124373] [2022-01-18 16:01:59,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475124373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:59,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606071585] [2022-01-18 16:01:59,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:01:59,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:59,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:59,380 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:01:59,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 16:01:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:01:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:59,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:01:59,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606071585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:59,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:59,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-01-18 16:01:59,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671164025] [2022-01-18 16:01:59,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:59,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:01:59,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:01:59,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:01:59,906 INFO L87 Difference]: Start difference. First operand 28876 states and 74988 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:01,686 INFO L93 Difference]: Finished difference Result 33473 states and 84685 transitions. [2022-01-18 16:02:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:02:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:01,758 INFO L225 Difference]: With dead ends: 33473 [2022-01-18 16:02:01,759 INFO L226 Difference]: Without dead ends: 33417 [2022-01-18 16:02:01,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5136 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3867, Invalid=11139, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 16:02:01,761 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 456 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:01,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 204 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:02:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33417 states. [2022-01-18 16:02:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33417 to 26468. [2022-01-18 16:02:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26468 states, 26467 states have (on average 2.601541542297956) internal successors, (68855), 26467 states have internal predecessors, (68855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26468 states to 26468 states and 68855 transitions. [2022-01-18 16:02:02,413 INFO L78 Accepts]: Start accepts. Automaton has 26468 states and 68855 transitions. Word has length 40 [2022-01-18 16:02:02,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:02,413 INFO L470 AbstractCegarLoop]: Abstraction has 26468 states and 68855 transitions. [2022-01-18 16:02:02,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 26468 states and 68855 transitions. [2022-01-18 16:02:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:02,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:02,431 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:02,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 16:02:02,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 16:02:02,632 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1180252431, now seen corresponding path program 122 times [2022-01-18 16:02:02,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:02,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231045954] [2022-01-18 16:02:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:02,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:02,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:02,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231045954] [2022-01-18 16:02:02,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231045954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:02,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013462957] [2022-01-18 16:02:02,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:02:02,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:02,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:02,762 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:02,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 16:02:02,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:02:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:03,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:03,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013462957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:03,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:03,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-01-18 16:02:03,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716601037] [2022-01-18 16:02:03,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:03,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:03,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:03,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:03,269 INFO L87 Difference]: Start difference. First operand 26468 states and 68855 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:05,071 INFO L93 Difference]: Finished difference Result 32096 states and 80790 transitions. [2022-01-18 16:02:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 16:02:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:05,128 INFO L225 Difference]: With dead ends: 32096 [2022-01-18 16:02:05,128 INFO L226 Difference]: Without dead ends: 32046 [2022-01-18 16:02:05,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5236 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3904, Invalid=11348, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 16:02:05,130 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 591 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:05,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 228 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:02:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32046 states. [2022-01-18 16:02:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32046 to 24004. [2022-01-18 16:02:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24004 states, 24003 states have (on average 2.599633379160938) internal successors, (62399), 24003 states have internal predecessors, (62399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24004 states to 24004 states and 62399 transitions. [2022-01-18 16:02:05,598 INFO L78 Accepts]: Start accepts. Automaton has 24004 states and 62399 transitions. Word has length 40 [2022-01-18 16:02:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:05,599 INFO L470 AbstractCegarLoop]: Abstraction has 24004 states and 62399 transitions. [2022-01-18 16:02:05,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24004 states and 62399 transitions. [2022-01-18 16:02:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:05,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:05,614 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:05,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 16:02:05,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:05,817 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:05,818 INFO L85 PathProgramCache]: Analyzing trace with hash 620886581, now seen corresponding path program 123 times [2022-01-18 16:02:05,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:05,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026828177] [2022-01-18 16:02:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:05,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:05,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026828177] [2022-01-18 16:02:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026828177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241654699] [2022-01-18 16:02:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:02:05,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:05,970 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:05,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 16:02:05,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:02:05,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:06,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:06,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:06,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241654699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:06,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:06,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-01-18 16:02:06,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834436436] [2022-01-18 16:02:06,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:06,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:02:06,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:02:06,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:02:06,643 INFO L87 Difference]: Start difference. First operand 24004 states and 62399 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:09,244 INFO L93 Difference]: Finished difference Result 28861 states and 72270 transitions. [2022-01-18 16:02:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 16:02:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:09,297 INFO L225 Difference]: With dead ends: 28861 [2022-01-18 16:02:09,297 INFO L226 Difference]: Without dead ends: 28861 [2022-01-18 16:02:09,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7191 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5273, Invalid=16483, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 16:02:09,300 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 446 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:09,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 364 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:02:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28861 states. [2022-01-18 16:02:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28861 to 21876. [2022-01-18 16:02:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21876 states, 21875 states have (on average 2.5954285714285716) internal successors, (56775), 21875 states have internal predecessors, (56775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21876 states to 21876 states and 56775 transitions. [2022-01-18 16:02:09,696 INFO L78 Accepts]: Start accepts. Automaton has 21876 states and 56775 transitions. Word has length 40 [2022-01-18 16:02:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:09,697 INFO L470 AbstractCegarLoop]: Abstraction has 21876 states and 56775 transitions. [2022-01-18 16:02:09,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 21876 states and 56775 transitions. [2022-01-18 16:02:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:09,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:09,709 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:09,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 16:02:09,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:09,911 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:09,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1406243953, now seen corresponding path program 124 times [2022-01-18 16:02:09,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:09,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994335298] [2022-01-18 16:02:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:09,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:10,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:10,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994335298] [2022-01-18 16:02:10,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994335298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:10,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132017337] [2022-01-18 16:02:10,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:02:10,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:10,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:10,043 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:10,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 16:02:10,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:02:10,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:10,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:10,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132017337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:10,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:10,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-01-18 16:02:10,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252756117] [2022-01-18 16:02:10,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:10,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:10,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:10,567 INFO L87 Difference]: Start difference. First operand 21876 states and 56775 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:12,766 INFO L93 Difference]: Finished difference Result 25120 states and 63294 transitions. [2022-01-18 16:02:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 16:02:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:12,809 INFO L225 Difference]: With dead ends: 25120 [2022-01-18 16:02:12,809 INFO L226 Difference]: Without dead ends: 24982 [2022-01-18 16:02:12,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6135 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4209, Invalid=13881, Unknown=0, NotChecked=0, Total=18090 [2022-01-18 16:02:12,810 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 481 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:12,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 308 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:02:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24982 states. [2022-01-18 16:02:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24982 to 21296. [2022-01-18 16:02:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21296 states, 21295 states have (on average 2.5844094857947875) internal successors, (55035), 21295 states have internal predecessors, (55035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21296 states to 21296 states and 55035 transitions. [2022-01-18 16:02:13,212 INFO L78 Accepts]: Start accepts. Automaton has 21296 states and 55035 transitions. Word has length 40 [2022-01-18 16:02:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:13,212 INFO L470 AbstractCegarLoop]: Abstraction has 21296 states and 55035 transitions. [2022-01-18 16:02:13,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 21296 states and 55035 transitions. [2022-01-18 16:02:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:13,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:13,226 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:13,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 16:02:13,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 16:02:13,438 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:13,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:13,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2109118261, now seen corresponding path program 125 times [2022-01-18 16:02:13,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:13,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544094242] [2022-01-18 16:02:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:13,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:13,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544094242] [2022-01-18 16:02:13,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544094242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28527968] [2022-01-18 16:02:13,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:02:13,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:13,553 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:13,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 16:02:13,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:02:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:13,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:14,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28527968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:14,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:14,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2022-01-18 16:02:14,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286276583] [2022-01-18 16:02:14,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:14,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:02:14,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:02:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:02:14,094 INFO L87 Difference]: Start difference. First operand 21296 states and 55035 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:16,895 INFO L93 Difference]: Finished difference Result 27538 states and 68321 transitions. [2022-01-18 16:02:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-18 16:02:16,896 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:16,957 INFO L225 Difference]: With dead ends: 27538 [2022-01-18 16:02:16,957 INFO L226 Difference]: Without dead ends: 27538 [2022-01-18 16:02:16,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8770 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6130, Invalid=18050, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 16:02:16,961 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 484 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:16,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 390 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:02:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27538 states. [2022-01-18 16:02:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27538 to 19476. [2022-01-18 16:02:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19476 states, 19475 states have (on average 2.5761232349165595) internal successors, (50170), 19475 states have internal predecessors, (50170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19476 states to 19476 states and 50170 transitions. [2022-01-18 16:02:17,393 INFO L78 Accepts]: Start accepts. Automaton has 19476 states and 50170 transitions. Word has length 40 [2022-01-18 16:02:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:17,393 INFO L470 AbstractCegarLoop]: Abstraction has 19476 states and 50170 transitions. [2022-01-18 16:02:17,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 19476 states and 50170 transitions. [2022-01-18 16:02:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:17,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:17,406 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:17,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 16:02:17,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 16:02:17,606 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1390383217, now seen corresponding path program 126 times [2022-01-18 16:02:17,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:17,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121000802] [2022-01-18 16:02:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:17,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:17,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121000802] [2022-01-18 16:02:17,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121000802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452569443] [2022-01-18 16:02:17,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:02:17,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:17,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:17,750 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:17,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 16:02:17,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:02:17,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:18,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:18,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452569443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:18,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:18,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-01-18 16:02:18,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736614234] [2022-01-18 16:02:18,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:18,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:18,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:18,318 INFO L87 Difference]: Start difference. First operand 19476 states and 50170 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:20,153 INFO L93 Difference]: Finished difference Result 22442 states and 56490 transitions. [2022-01-18 16:02:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 16:02:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:20,192 INFO L225 Difference]: With dead ends: 22442 [2022-01-18 16:02:20,192 INFO L226 Difference]: Without dead ends: 22343 [2022-01-18 16:02:20,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5436 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3703, Invalid=12047, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 16:02:20,194 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 573 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:20,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 247 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:02:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2022-01-18 16:02:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 19294. [2022-01-18 16:02:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19294 states, 19293 states have (on average 2.5669932099725288) internal successors, (49525), 19293 states have internal predecessors, (49525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19294 states to 19294 states and 49525 transitions. [2022-01-18 16:02:20,602 INFO L78 Accepts]: Start accepts. Automaton has 19294 states and 49525 transitions. Word has length 40 [2022-01-18 16:02:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:20,603 INFO L470 AbstractCegarLoop]: Abstraction has 19294 states and 49525 transitions. [2022-01-18 16:02:20,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 19294 states and 49525 transitions. [2022-01-18 16:02:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:20,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:20,615 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:20,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 16:02:20,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:20,831 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash -991005643, now seen corresponding path program 127 times [2022-01-18 16:02:20,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:20,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025499785] [2022-01-18 16:02:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:20,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:20,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:20,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025499785] [2022-01-18 16:02:20,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025499785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:20,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686425861] [2022-01-18 16:02:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:02:20,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:20,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:20,941 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:20,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 16:02:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:20,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:21,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:21,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686425861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:21,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:21,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-01-18 16:02:21,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485488050] [2022-01-18 16:02:21,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:21,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:02:21,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:02:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:02:21,504 INFO L87 Difference]: Start difference. First operand 19294 states and 49525 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:24,688 INFO L93 Difference]: Finished difference Result 26530 states and 65364 transitions. [2022-01-18 16:02:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-18 16:02:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:24,737 INFO L225 Difference]: With dead ends: 26530 [2022-01-18 16:02:24,738 INFO L226 Difference]: Without dead ends: 26530 [2022-01-18 16:02:24,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11387 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7659, Invalid=20733, Unknown=0, NotChecked=0, Total=28392 [2022-01-18 16:02:24,741 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 634 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:24,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 352 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:02:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26530 states. [2022-01-18 16:02:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26530 to 17898. [2022-01-18 16:02:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17898 states, 17897 states have (on average 2.5554003464267754) internal successors, (45734), 17897 states have internal predecessors, (45734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17898 states to 17898 states and 45734 transitions. [2022-01-18 16:02:25,091 INFO L78 Accepts]: Start accepts. Automaton has 17898 states and 45734 transitions. Word has length 40 [2022-01-18 16:02:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:25,091 INFO L470 AbstractCegarLoop]: Abstraction has 17898 states and 45734 transitions. [2022-01-18 16:02:25,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 17898 states and 45734 transitions. [2022-01-18 16:02:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:25,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:25,102 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:25,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 16:02:25,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:25,303 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1966902385, now seen corresponding path program 128 times [2022-01-18 16:02:25,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:25,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282658554] [2022-01-18 16:02:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:25,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:25,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282658554] [2022-01-18 16:02:25,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282658554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083478600] [2022-01-18 16:02:25,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:02:25,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:25,402 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:25,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 16:02:25,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:02:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:25,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:25,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:25,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083478600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:25,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:25,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-01-18 16:02:25,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902887694] [2022-01-18 16:02:25,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:25,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:25,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:25,939 INFO L87 Difference]: Start difference. First operand 17898 states and 45734 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:27,656 INFO L93 Difference]: Finished difference Result 20487 states and 51579 transitions. [2022-01-18 16:02:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 16:02:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:27,690 INFO L225 Difference]: With dead ends: 20487 [2022-01-18 16:02:27,690 INFO L226 Difference]: Without dead ends: 20421 [2022-01-18 16:02:27,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3382, Invalid=10660, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 16:02:27,692 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 430 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:27,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 274 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:02:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20421 states. [2022-01-18 16:02:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20421 to 18251. [2022-01-18 16:02:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 18250 states have (on average 2.5564383561643838) internal successors, (46655), 18250 states have internal predecessors, (46655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 46655 transitions. [2022-01-18 16:02:28,031 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 46655 transitions. Word has length 40 [2022-01-18 16:02:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:28,031 INFO L470 AbstractCegarLoop]: Abstraction has 18251 states and 46655 transitions. [2022-01-18 16:02:28,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 46655 transitions. [2022-01-18 16:02:28,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:28,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:28,043 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:28,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 16:02:28,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:28,247 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1115263285, now seen corresponding path program 129 times [2022-01-18 16:02:28,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:28,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645630602] [2022-01-18 16:02:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:28,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:28,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645630602] [2022-01-18 16:02:28,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645630602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455302927] [2022-01-18 16:02:28,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:02:28,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:28,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:28,397 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:28,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 16:02:28,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:02:28,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:28,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:28,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:28,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455302927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:28,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:28,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 40 [2022-01-18 16:02:28,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71690596] [2022-01-18 16:02:28,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:28,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:02:28,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:02:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:02:28,993 INFO L87 Difference]: Start difference. First operand 18251 states and 46655 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:32,501 INFO L93 Difference]: Finished difference Result 26524 states and 65049 transitions. [2022-01-18 16:02:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-18 16:02:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:32,552 INFO L225 Difference]: With dead ends: 26524 [2022-01-18 16:02:32,552 INFO L226 Difference]: Without dead ends: 26524 [2022-01-18 16:02:32,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15320 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9859, Invalid=24923, Unknown=0, NotChecked=0, Total=34782 [2022-01-18 16:02:32,556 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 685 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:32,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 403 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:02:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2022-01-18 16:02:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17253. [2022-01-18 16:02:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17253 states, 17252 states have (on average 2.541386505912358) internal successors, (43844), 17252 states have internal predecessors, (43844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17253 states to 17253 states and 43844 transitions. [2022-01-18 16:02:32,951 INFO L78 Accepts]: Start accepts. Automaton has 17253 states and 43844 transitions. Word has length 40 [2022-01-18 16:02:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:32,951 INFO L470 AbstractCegarLoop]: Abstraction has 17253 states and 43844 transitions. [2022-01-18 16:02:32,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 17253 states and 43844 transitions. [2022-01-18 16:02:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:32,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:32,962 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:32,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 16:02:33,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 16:02:33,163 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1118341233, now seen corresponding path program 130 times [2022-01-18 16:02:33,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:33,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093940356] [2022-01-18 16:02:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:33,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:33,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:33,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093940356] [2022-01-18 16:02:33,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093940356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:33,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392601812] [2022-01-18 16:02:33,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:02:33,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:33,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:33,264 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:33,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 16:02:33,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:02:33,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:33,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:33,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:33,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392601812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:33,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:33,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-01-18 16:02:33,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289040858] [2022-01-18 16:02:33,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:33,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:33,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:33,820 INFO L87 Difference]: Start difference. First operand 17253 states and 43844 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:35,469 INFO L93 Difference]: Finished difference Result 19251 states and 48390 transitions. [2022-01-18 16:02:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:02:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:35,500 INFO L225 Difference]: With dead ends: 19251 [2022-01-18 16:02:35,500 INFO L226 Difference]: Without dead ends: 19212 [2022-01-18 16:02:35,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3202, Invalid=9680, Unknown=0, NotChecked=0, Total=12882 [2022-01-18 16:02:35,501 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 304 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:35,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 345 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:02:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19212 states. [2022-01-18 16:02:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19212 to 17619. [2022-01-18 16:02:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17619 states, 17618 states have (on average 2.546032466795323) internal successors, (44856), 17618 states have internal predecessors, (44856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17619 states to 17619 states and 44856 transitions. [2022-01-18 16:02:35,849 INFO L78 Accepts]: Start accepts. Automaton has 17619 states and 44856 transitions. Word has length 40 [2022-01-18 16:02:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 17619 states and 44856 transitions. [2022-01-18 16:02:35,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 17619 states and 44856 transitions. [2022-01-18 16:02:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:35,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:35,860 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:35,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 16:02:36,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 16:02:36,061 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash -232264139, now seen corresponding path program 131 times [2022-01-18 16:02:36,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204751853] [2022-01-18 16:02:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:36,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:36,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:36,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204751853] [2022-01-18 16:02:36,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204751853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:36,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641105131] [2022-01-18 16:02:36,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:02:36,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:36,159 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:36,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 16:02:36,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:02:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:36,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:36,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641105131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:36,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:36,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 40 [2022-01-18 16:02:36,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5290552] [2022-01-18 16:02:36,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:36,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:02:36,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:36,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:02:36,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:02:36,763 INFO L87 Difference]: Start difference. First operand 17619 states and 44856 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:40,683 INFO L93 Difference]: Finished difference Result 29040 states and 70961 transitions. [2022-01-18 16:02:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-18 16:02:40,684 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:40,736 INFO L225 Difference]: With dead ends: 29040 [2022-01-18 16:02:40,736 INFO L226 Difference]: Without dead ends: 29040 [2022-01-18 16:02:40,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19281 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=11962, Invalid=29450, Unknown=0, NotChecked=0, Total=41412 [2022-01-18 16:02:40,741 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 648 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:40,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 459 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:02:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29040 states. [2022-01-18 16:02:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29040 to 22012. [2022-01-18 16:02:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22012 states, 22011 states have (on average 2.520875925673527) internal successors, (55487), 22011 states have internal predecessors, (55487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22012 states to 22012 states and 55487 transitions. [2022-01-18 16:02:41,217 INFO L78 Accepts]: Start accepts. Automaton has 22012 states and 55487 transitions. Word has length 40 [2022-01-18 16:02:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:41,217 INFO L470 AbstractCegarLoop]: Abstraction has 22012 states and 55487 transitions. [2022-01-18 16:02:41,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 22012 states and 55487 transitions. [2022-01-18 16:02:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:41,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:41,230 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:41,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 16:02:41,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 16:02:41,430 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash 853771377, now seen corresponding path program 132 times [2022-01-18 16:02:41,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:41,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434408192] [2022-01-18 16:02:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:41,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:41,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434408192] [2022-01-18 16:02:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434408192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422204489] [2022-01-18 16:02:41,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:02:41,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:41,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:41,521 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:41,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 16:02:41,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:02:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:41,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:42,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422204489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:42,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:42,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-01-18 16:02:42,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426365075] [2022-01-18 16:02:42,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:42,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:42,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:42,138 INFO L87 Difference]: Start difference. First operand 22012 states and 55487 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:43,709 INFO L93 Difference]: Finished difference Result 23071 states and 57669 transitions. [2022-01-18 16:02:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:02:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:43,747 INFO L225 Difference]: With dead ends: 23071 [2022-01-18 16:02:43,747 INFO L226 Difference]: Without dead ends: 23053 [2022-01-18 16:02:43,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3125, Invalid=9085, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 16:02:43,749 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 331 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:43,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 261 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:02:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23053 states. [2022-01-18 16:02:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23053 to 22214. [2022-01-18 16:02:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22214 states, 22213 states have (on average 2.5227119254490615) internal successors, (56037), 22213 states have internal predecessors, (56037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22214 states to 22214 states and 56037 transitions. [2022-01-18 16:02:44,109 INFO L78 Accepts]: Start accepts. Automaton has 22214 states and 56037 transitions. Word has length 40 [2022-01-18 16:02:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:44,109 INFO L470 AbstractCegarLoop]: Abstraction has 22214 states and 56037 transitions. [2022-01-18 16:02:44,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22214 states and 56037 transitions. [2022-01-18 16:02:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:44,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:44,123 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:44,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 16:02:44,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 16:02:44,323 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2083943627, now seen corresponding path program 133 times [2022-01-18 16:02:44,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:44,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371354560] [2022-01-18 16:02:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:44,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:44,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371354560] [2022-01-18 16:02:44,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371354560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322619893] [2022-01-18 16:02:44,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:02:44,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:44,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:44,438 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:44,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 16:02:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:44,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:44,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:45,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322619893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:45,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:45,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 40 [2022-01-18 16:02:45,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568458072] [2022-01-18 16:02:45,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:45,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:02:45,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:02:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:02:45,067 INFO L87 Difference]: Start difference. First operand 22214 states and 56037 transitions. Second operand has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:49,420 INFO L93 Difference]: Finished difference Result 37816 states and 93511 transitions. [2022-01-18 16:02:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-01-18 16:02:49,421 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:49,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:49,578 INFO L225 Difference]: With dead ends: 37816 [2022-01-18 16:02:49,579 INFO L226 Difference]: Without dead ends: 37816 [2022-01-18 16:02:49,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23403 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13884, Invalid=35622, Unknown=0, NotChecked=0, Total=49506 [2022-01-18 16:02:49,580 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 772 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:49,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 351 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:02:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37816 states. [2022-01-18 16:02:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37816 to 32904. [2022-01-18 16:02:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32904 states, 32903 states have (on average 2.529982068504392) internal successors, (83244), 32903 states have internal predecessors, (83244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32904 states to 32904 states and 83244 transitions. [2022-01-18 16:02:50,235 INFO L78 Accepts]: Start accepts. Automaton has 32904 states and 83244 transitions. Word has length 40 [2022-01-18 16:02:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:50,235 INFO L470 AbstractCegarLoop]: Abstraction has 32904 states and 83244 transitions. [2022-01-18 16:02:50,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32904 states and 83244 transitions. [2022-01-18 16:02:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:50,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:50,253 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:50,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 16:02:50,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:50,454 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash 265003035, now seen corresponding path program 134 times [2022-01-18 16:02:50,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:50,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493210759] [2022-01-18 16:02:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:50,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:50,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493210759] [2022-01-18 16:02:50,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493210759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158114518] [2022-01-18 16:02:50,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:02:50,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:50,543 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:50,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 16:02:50,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:02:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:50,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:51,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158114518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:51,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:51,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-01-18 16:02:51,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754433157] [2022-01-18 16:02:51,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:51,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:51,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:51,158 INFO L87 Difference]: Start difference. First operand 32904 states and 83244 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:53,726 INFO L93 Difference]: Finished difference Result 35887 states and 89458 transitions. [2022-01-18 16:02:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-18 16:02:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:53,792 INFO L225 Difference]: With dead ends: 35887 [2022-01-18 16:02:53,792 INFO L226 Difference]: Without dead ends: 35883 [2022-01-18 16:02:53,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8367 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6364, Invalid=16588, Unknown=0, NotChecked=0, Total=22952 [2022-01-18 16:02:53,795 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 725 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:53,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 159 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:02:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35883 states. [2022-01-18 16:02:54,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35883 to 32269. [2022-01-18 16:02:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32269 states, 32268 states have (on average 2.526465848518656) internal successors, (81524), 32268 states have internal predecessors, (81524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32269 states to 32269 states and 81524 transitions. [2022-01-18 16:02:54,501 INFO L78 Accepts]: Start accepts. Automaton has 32269 states and 81524 transitions. Word has length 40 [2022-01-18 16:02:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:54,501 INFO L470 AbstractCegarLoop]: Abstraction has 32269 states and 81524 transitions. [2022-01-18 16:02:54,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 32269 states and 81524 transitions. [2022-01-18 16:02:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:54,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:54,521 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:54,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 16:02:54,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 16:02:54,721 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash -241343231, now seen corresponding path program 135 times [2022-01-18 16:02:54,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:54,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161376538] [2022-01-18 16:02:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:54,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:54,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:54,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161376538] [2022-01-18 16:02:54,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161376538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:54,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761941478] [2022-01-18 16:02:54,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:02:54,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:54,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:54,822 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:54,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 16:02:54,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:02:54,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:54,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:55,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:55,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761941478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:55,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:55,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-01-18 16:02:55,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306579742] [2022-01-18 16:02:55,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:55,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:55,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:55,423 INFO L87 Difference]: Start difference. First operand 32269 states and 81524 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:02:57,792 INFO L93 Difference]: Finished difference Result 36401 states and 90806 transitions. [2022-01-18 16:02:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-18 16:02:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:02:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:02:57,851 INFO L225 Difference]: With dead ends: 36401 [2022-01-18 16:02:57,851 INFO L226 Difference]: Without dead ends: 36389 [2022-01-18 16:02:57,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5437, Invalid=14585, Unknown=0, NotChecked=0, Total=20022 [2022-01-18 16:02:57,854 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 721 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:02:57,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 162 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:02:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36389 states. [2022-01-18 16:02:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36389 to 31831. [2022-01-18 16:02:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31831 states, 31830 states have (on average 2.527615457115928) internal successors, (80454), 31830 states have internal predecessors, (80454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31831 states to 31831 states and 80454 transitions. [2022-01-18 16:02:58,528 INFO L78 Accepts]: Start accepts. Automaton has 31831 states and 80454 transitions. Word has length 40 [2022-01-18 16:02:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:02:58,528 INFO L470 AbstractCegarLoop]: Abstraction has 31831 states and 80454 transitions. [2022-01-18 16:02:58,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:02:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 31831 states and 80454 transitions. [2022-01-18 16:02:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:02:58,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:02:58,547 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:02:58,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 16:02:58,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:58,747 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:02:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:02:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -468564611, now seen corresponding path program 136 times [2022-01-18 16:02:58,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:02:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693730428] [2022-01-18 16:02:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:02:58,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:02:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:02:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:02:58,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:02:58,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693730428] [2022-01-18 16:02:58,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693730428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:02:58,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933272673] [2022-01-18 16:02:58,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:02:58,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:02:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:02:58,843 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:02:58,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 16:02:58,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:02:58,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:02:58,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:02:58,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:02:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:59,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:02:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:02:59,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933272673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:02:59,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:02:59,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-01-18 16:02:59,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226287077] [2022-01-18 16:02:59,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:02:59,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:02:59,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:02:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:02:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:02:59,418 INFO L87 Difference]: Start difference. First operand 31831 states and 80454 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:01,586 INFO L93 Difference]: Finished difference Result 37561 states and 93690 transitions. [2022-01-18 16:03:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 16:03:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:03:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:01,664 INFO L225 Difference]: With dead ends: 37561 [2022-01-18 16:03:01,665 INFO L226 Difference]: Without dead ends: 37541 [2022-01-18 16:03:01,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6226 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4822, Invalid=13268, Unknown=0, NotChecked=0, Total=18090 [2022-01-18 16:03:01,667 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 608 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:01,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 189 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:03:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37541 states. [2022-01-18 16:03:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37541 to 32042. [2022-01-18 16:03:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32042 states, 32041 states have (on average 2.529758746605911) internal successors, (81056), 32041 states have internal predecessors, (81056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32042 states to 32042 states and 81056 transitions. [2022-01-18 16:03:02,342 INFO L78 Accepts]: Start accepts. Automaton has 32042 states and 81056 transitions. Word has length 40 [2022-01-18 16:03:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:02,342 INFO L470 AbstractCegarLoop]: Abstraction has 32042 states and 81056 transitions. [2022-01-18 16:03:02,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 32042 states and 81056 transitions. [2022-01-18 16:03:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:03:02,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:02,359 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:02,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 16:03:02,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:02,560 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash 215021305, now seen corresponding path program 137 times [2022-01-18 16:03:02,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:02,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105002291] [2022-01-18 16:03:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:02,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:02,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105002291] [2022-01-18 16:03:02,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105002291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321307351] [2022-01-18 16:03:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:03:02,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:02,676 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:02,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 16:03:02,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:03:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:03:02,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:03:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:03,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:03,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321307351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:03,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:03,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-01-18 16:03:03,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432156831] [2022-01-18 16:03:03,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:03,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:03:03,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:03:03,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:03:03,248 INFO L87 Difference]: Start difference. First operand 32042 states and 81056 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:05,383 INFO L93 Difference]: Finished difference Result 39838 states and 99403 transitions. [2022-01-18 16:03:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 16:03:05,384 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:03:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:05,469 INFO L225 Difference]: With dead ends: 39838 [2022-01-18 16:03:05,469 INFO L226 Difference]: Without dead ends: 39810 [2022-01-18 16:03:05,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4483, Invalid=12547, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 16:03:05,471 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 664 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:05,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 186 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:03:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39810 states. [2022-01-18 16:03:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39810 to 33837. [2022-01-18 16:03:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33837 states, 33836 states have (on average 2.535997162785199) internal successors, (85808), 33836 states have internal predecessors, (85808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33837 states to 33837 states and 85808 transitions. [2022-01-18 16:03:06,188 INFO L78 Accepts]: Start accepts. Automaton has 33837 states and 85808 transitions. Word has length 40 [2022-01-18 16:03:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:06,188 INFO L470 AbstractCegarLoop]: Abstraction has 33837 states and 85808 transitions. [2022-01-18 16:03:06,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 33837 states and 85808 transitions. [2022-01-18 16:03:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:03:06,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:06,205 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:06,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 16:03:06,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:06,406 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:06,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:06,406 INFO L85 PathProgramCache]: Analyzing trace with hash 11090293, now seen corresponding path program 138 times [2022-01-18 16:03:06,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:06,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685117814] [2022-01-18 16:03:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:06,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:06,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685117814] [2022-01-18 16:03:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685117814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696054165] [2022-01-18 16:03:06,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:03:06,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:06,513 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:06,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 16:03:06,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:03:06,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:03:06,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:03:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:06,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:07,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696054165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:07,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:07,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-01-18 16:03:07,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550096200] [2022-01-18 16:03:07,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:07,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:03:07,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:07,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:03:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:03:07,050 INFO L87 Difference]: Start difference. First operand 33837 states and 85808 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:09,343 INFO L93 Difference]: Finished difference Result 43908 states and 109576 transitions. [2022-01-18 16:03:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 16:03:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:03:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:09,443 INFO L225 Difference]: With dead ends: 43908 [2022-01-18 16:03:09,443 INFO L226 Difference]: Without dead ends: 43872 [2022-01-18 16:03:09,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5548 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4373, Invalid=12397, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 16:03:09,444 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 873 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:09,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 147 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:03:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43872 states. [2022-01-18 16:03:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43872 to 40323. [2022-01-18 16:03:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40323 states, 40322 states have (on average 2.537894945687218) internal successors, (102333), 40322 states have internal predecessors, (102333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40323 states to 40323 states and 102333 transitions. [2022-01-18 16:03:10,350 INFO L78 Accepts]: Start accepts. Automaton has 40323 states and 102333 transitions. Word has length 40 [2022-01-18 16:03:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:10,350 INFO L470 AbstractCegarLoop]: Abstraction has 40323 states and 102333 transitions. [2022-01-18 16:03:10,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 40323 states and 102333 transitions. [2022-01-18 16:03:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:03:10,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:10,376 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:10,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 16:03:10,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:10,577 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1601883377, now seen corresponding path program 139 times [2022-01-18 16:03:10,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:10,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421943598] [2022-01-18 16:03:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:10,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:10,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421943598] [2022-01-18 16:03:10,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421943598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:10,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166478978] [2022-01-18 16:03:10,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:03:10,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:10,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:10,710 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:10,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 16:03:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:03:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:11,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:11,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166478978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:11,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:11,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-01-18 16:03:11,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771591847] [2022-01-18 16:03:11,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:11,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:03:11,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:03:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:03:11,236 INFO L87 Difference]: Start difference. First operand 40323 states and 102333 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:13,431 INFO L93 Difference]: Finished difference Result 50681 states and 126374 transitions. [2022-01-18 16:03:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 16:03:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:03:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:13,561 INFO L225 Difference]: With dead ends: 50681 [2022-01-18 16:03:13,561 INFO L226 Difference]: Without dead ends: 50637 [2022-01-18 16:03:13,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5786 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4453, Invalid=12839, Unknown=0, NotChecked=0, Total=17292 [2022-01-18 16:03:13,564 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 689 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:13,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 211 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:03:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50637 states. [2022-01-18 16:03:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50637 to 46817. [2022-01-18 16:03:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46817 states, 46816 states have (on average 2.533685064935065) internal successors, (118617), 46816 states have internal predecessors, (118617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46817 states to 46817 states and 118617 transitions. [2022-01-18 16:03:14,639 INFO L78 Accepts]: Start accepts. Automaton has 46817 states and 118617 transitions. Word has length 40 [2022-01-18 16:03:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:14,639 INFO L470 AbstractCegarLoop]: Abstraction has 46817 states and 118617 transitions. [2022-01-18 16:03:14,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 46817 states and 118617 transitions. [2022-01-18 16:03:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:03:14,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:14,664 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:14,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 16:03:14,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 16:03:14,865 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:14,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1345679725, now seen corresponding path program 140 times [2022-01-18 16:03:14,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:14,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702992814] [2022-01-18 16:03:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:14,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:14,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702992814] [2022-01-18 16:03:14,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702992814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530616404] [2022-01-18 16:03:14,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:03:14,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:14,987 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:14,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 16:03:15,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:03:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:03:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:03:15,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:15,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:15,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530616404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:15,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:15,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-01-18 16:03:15,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021151467] [2022-01-18 16:03:15,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:15,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:03:15,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:03:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:03:15,494 INFO L87 Difference]: Start difference. First operand 46817 states and 118617 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:17,621 INFO L93 Difference]: Finished difference Result 50538 states and 126417 transitions. [2022-01-18 16:03:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:03:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 16:03:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:17,747 INFO L225 Difference]: With dead ends: 50538 [2022-01-18 16:03:17,748 INFO L226 Difference]: Without dead ends: 50486 [2022-01-18 16:03:17,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3949, Invalid=11551, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 16:03:17,749 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 756 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:17,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 210 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:03:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50486 states. [2022-01-18 16:03:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50486 to 46981. [2022-01-18 16:03:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46981 states, 46980 states have (on average 2.5367177522349937) internal successors, (119175), 46980 states have internal predecessors, (119175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46981 states to 46981 states and 119175 transitions. [2022-01-18 16:03:18,773 INFO L78 Accepts]: Start accepts. Automaton has 46981 states and 119175 transitions. Word has length 40 [2022-01-18 16:03:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:18,773 INFO L470 AbstractCegarLoop]: Abstraction has 46981 states and 119175 transitions. [2022-01-18 16:03:18,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 46981 states and 119175 transitions. [2022-01-18 16:03:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:03:18,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:18,807 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:18,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 16:03:19,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 16:03:19,008 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash 843909491, now seen corresponding path program 141 times [2022-01-18 16:03:19,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:19,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138071196] [2022-01-18 16:03:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:19,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:19,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:19,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138071196] [2022-01-18 16:03:19,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138071196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:19,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724117561] [2022-01-18 16:03:19,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:03:19,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:19,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:19,060 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:19,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 16:03:19,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:03:19,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:03:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 16:03:19,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:19,897 INFO L353 Elim1Store]: treesize reduction 1013, result has 21.9 percent of original size [2022-01-18 16:03:19,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 224 treesize of output 373 [2022-01-18 16:03:19,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:19,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 27 case distinctions, treesize of input 489 treesize of output 283 [2022-01-18 16:03:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:21,001 INFO L353 Elim1Store]: treesize reduction 128, result has 43.1 percent of original size [2022-01-18 16:03:21,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 232 treesize of output 214 [2022-01-18 16:03:21,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:21,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 296 [2022-01-18 16:03:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:03:21,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724117561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:21,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:21,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-01-18 16:03:21,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112544126] [2022-01-18 16:03:21,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:21,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:03:21,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:21,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:03:21,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:03:21,543 INFO L87 Difference]: Start difference. First operand 46981 states and 119175 transitions. Second operand has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:22,273 INFO L93 Difference]: Finished difference Result 50429 states and 127823 transitions. [2022-01-18 16:03:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:03:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:03:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:22,387 INFO L225 Difference]: With dead ends: 50429 [2022-01-18 16:03:22,387 INFO L226 Difference]: Without dead ends: 50422 [2022-01-18 16:03:22,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:03:22,388 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 232 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:22,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1293 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:03:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50422 states. [2022-01-18 16:03:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50422 to 49976. [2022-01-18 16:03:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49976 states, 49975 states have (on average 2.542091045522761) internal successors, (127041), 49975 states have internal predecessors, (127041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49976 states to 49976 states and 127041 transitions. [2022-01-18 16:03:23,454 INFO L78 Accepts]: Start accepts. Automaton has 49976 states and 127041 transitions. Word has length 42 [2022-01-18 16:03:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:23,454 INFO L470 AbstractCegarLoop]: Abstraction has 49976 states and 127041 transitions. [2022-01-18 16:03:23,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 49976 states and 127041 transitions. [2022-01-18 16:03:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:03:23,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:23,492 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:23,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 16:03:23,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:23,693 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:23,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1417483661, now seen corresponding path program 142 times [2022-01-18 16:03:23,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:23,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247404262] [2022-01-18 16:03:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:23,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:03:23,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:23,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247404262] [2022-01-18 16:03:23,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247404262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:23,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391571621] [2022-01-18 16:03:23,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:03:23,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:23,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:23,748 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:23,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 16:03:23,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:03:23,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:03:23,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 16:03:23,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:24,413 INFO L353 Elim1Store]: treesize reduction 749, result has 24.4 percent of original size [2022-01-18 16:03:24,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 187 treesize of output 316 [2022-01-18 16:03:24,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:24,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 409 treesize of output 286 [2022-01-18 16:03:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:24,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:25,068 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-01-18 16:03:25,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 196 treesize of output 190 [2022-01-18 16:03:25,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:25,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 460 treesize of output 296 [2022-01-18 16:03:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:25,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391571621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:25,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:25,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 35 [2022-01-18 16:03:25,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460852471] [2022-01-18 16:03:25,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:25,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:03:25,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:03:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:03:25,424 INFO L87 Difference]: Start difference. First operand 49976 states and 127041 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:26,196 INFO L93 Difference]: Finished difference Result 52344 states and 132850 transitions. [2022-01-18 16:03:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:03:26,197 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:03:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:26,319 INFO L225 Difference]: With dead ends: 52344 [2022-01-18 16:03:26,320 INFO L226 Difference]: Without dead ends: 52328 [2022-01-18 16:03:26,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:03:26,320 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 265 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:26,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1357 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:03:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52328 states. [2022-01-18 16:03:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52328 to 51480. [2022-01-18 16:03:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51480 states, 51479 states have (on average 2.547854464927446) internal successors, (131161), 51479 states have internal predecessors, (131161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51480 states to 51480 states and 131161 transitions. [2022-01-18 16:03:27,357 INFO L78 Accepts]: Start accepts. Automaton has 51480 states and 131161 transitions. Word has length 42 [2022-01-18 16:03:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:27,357 INFO L470 AbstractCegarLoop]: Abstraction has 51480 states and 131161 transitions. [2022-01-18 16:03:27,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 51480 states and 131161 transitions. [2022-01-18 16:03:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:03:27,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:27,393 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:27,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 16:03:27,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 16:03:27,593 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1200959117, now seen corresponding path program 143 times [2022-01-18 16:03:27,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:27,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592442936] [2022-01-18 16:03:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:27,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:03:27,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592442936] [2022-01-18 16:03:27,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592442936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:27,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523792498] [2022-01-18 16:03:27,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:03:27,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:27,642 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:27,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 16:03:27,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 16:03:27,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:03:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:03:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:28,179 INFO L353 Elim1Store]: treesize reduction 534, result has 27.9 percent of original size [2022-01-18 16:03:28,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 201 treesize of output 273 [2022-01-18 16:03:28,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:28,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 359 treesize of output 286 [2022-01-18 16:03:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:28,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:29,356 INFO L353 Elim1Store]: treesize reduction 124, result has 44.9 percent of original size [2022-01-18 16:03:29,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 212 treesize of output 218 [2022-01-18 16:03:29,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:29,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 486 treesize of output 296 [2022-01-18 16:03:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:29,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523792498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:29,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:29,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 34 [2022-01-18 16:03:29,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309180] [2022-01-18 16:03:29,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:29,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:03:29,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:03:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:03:29,805 INFO L87 Difference]: Start difference. First operand 51480 states and 131161 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:30,627 INFO L93 Difference]: Finished difference Result 53659 states and 136592 transitions. [2022-01-18 16:03:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:03:30,627 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:03:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:30,748 INFO L225 Difference]: With dead ends: 53659 [2022-01-18 16:03:30,748 INFO L226 Difference]: Without dead ends: 53634 [2022-01-18 16:03:30,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:03:30,748 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 210 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:30,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1864 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1390 Invalid, 0 Unknown, 10 Unchecked, 0.6s Time] [2022-01-18 16:03:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53634 states. [2022-01-18 16:03:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53634 to 52433. [2022-01-18 16:03:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52433 states, 52432 states have (on average 2.5524679584986267) internal successors, (133831), 52432 states have internal predecessors, (133831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52433 states to 52433 states and 133831 transitions. [2022-01-18 16:03:31,824 INFO L78 Accepts]: Start accepts. Automaton has 52433 states and 133831 transitions. Word has length 42 [2022-01-18 16:03:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:31,824 INFO L470 AbstractCegarLoop]: Abstraction has 52433 states and 133831 transitions. [2022-01-18 16:03:31,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 52433 states and 133831 transitions. [2022-01-18 16:03:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:03:31,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:31,866 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:31,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 16:03:32,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 16:03:32,067 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash 720697459, now seen corresponding path program 144 times [2022-01-18 16:03:32,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:32,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800778464] [2022-01-18 16:03:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:32,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:03:32,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:32,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800778464] [2022-01-18 16:03:32,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800778464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144386140] [2022-01-18 16:03:32,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:03:32,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:32,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:32,116 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:32,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 16:03:32,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-18 16:03:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:03:32,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 16:03:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:32,771 INFO L353 Elim1Store]: treesize reduction 469, result has 26.8 percent of original size [2022-01-18 16:03:32,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 55 case distinctions, treesize of input 272 treesize of output 254 [2022-01-18 16:03:32,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:32,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 286 [2022-01-18 16:03:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:32,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:33,464 INFO L353 Elim1Store]: treesize reduction 184, result has 36.3 percent of original size [2022-01-18 16:03:33,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 220 treesize of output 242 [2022-01-18 16:03:33,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:33,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-01-18 16:03:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:33,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144386140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:33,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:33,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-01-18 16:03:33,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220694917] [2022-01-18 16:03:33,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:33,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:03:33,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:03:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:03:33,781 INFO L87 Difference]: Start difference. First operand 52433 states and 133831 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:34,636 INFO L93 Difference]: Finished difference Result 54610 states and 139489 transitions. [2022-01-18 16:03:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:03:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:03:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:34,759 INFO L225 Difference]: With dead ends: 54610 [2022-01-18 16:03:34,760 INFO L226 Difference]: Without dead ends: 54588 [2022-01-18 16:03:34,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:03:34,760 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 237 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:34,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1602 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:03:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54588 states. [2022-01-18 16:03:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54588 to 53500. [2022-01-18 16:03:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53500 states, 53499 states have (on average 2.556926297687807) internal successors, (136793), 53499 states have internal predecessors, (136793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53500 states to 53500 states and 136793 transitions. [2022-01-18 16:03:35,869 INFO L78 Accepts]: Start accepts. Automaton has 53500 states and 136793 transitions. Word has length 42 [2022-01-18 16:03:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:03:35,870 INFO L470 AbstractCegarLoop]: Abstraction has 53500 states and 136793 transitions. [2022-01-18 16:03:35,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 53500 states and 136793 transitions. [2022-01-18 16:03:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:03:35,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:03:35,904 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:03:35,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 16:03:36,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 16:03:36,105 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:03:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:03:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash 596729715, now seen corresponding path program 145 times [2022-01-18 16:03:36,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:03:36,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210583553] [2022-01-18 16:03:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:03:36,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:03:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:03:36,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:03:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210583553] [2022-01-18 16:03:36,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210583553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:03:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039239509] [2022-01-18 16:03:36,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:03:36,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:03:36,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:03:36,153 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:03:36,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 16:03:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:03:36,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 16:03:36,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:03:36,533 INFO L353 Elim1Store]: treesize reduction 240, result has 37.7 percent of original size [2022-01-18 16:03:36,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 205 treesize of output 201 [2022-01-18 16:03:56,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:56,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 303 treesize of output 286 [2022-01-18 16:03:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:57,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:03:57,808 INFO L353 Elim1Store]: treesize reduction 252, result has 30.2 percent of original size [2022-01-18 16:03:57,809 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 220 treesize of output 262 [2022-01-18 16:03:57,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:03:57,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-01-18 16:03:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:03:58,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039239509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:03:58,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:03:58,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 32 [2022-01-18 16:03:58,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146364410] [2022-01-18 16:03:58,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:03:58,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:03:58,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:03:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:03:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:03:58,202 INFO L87 Difference]: Start difference. First operand 53500 states and 136793 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:03:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:03:58,819 INFO L93 Difference]: Finished difference Result 56164 states and 143597 transitions. [2022-01-18 16:03:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 16:03:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:03:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:03:58,947 INFO L225 Difference]: With dead ends: 56164 [2022-01-18 16:03:58,947 INFO L226 Difference]: Without dead ends: 56131 [2022-01-18 16:03:58,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:03:58,947 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 212 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:03:58,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1783 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1035 Invalid, 0 Unknown, 216 Unchecked, 0.4s Time] [2022-01-18 16:03:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56131 states. [2022-01-18 16:04:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56131 to 54544. [2022-01-18 16:04:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54544 states, 54543 states have (on average 2.5606402288102963) internal successors, (139665), 54543 states have internal predecessors, (139665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:04:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54544 states to 54544 states and 139665 transitions. [2022-01-18 16:04:00,226 INFO L78 Accepts]: Start accepts. Automaton has 54544 states and 139665 transitions. Word has length 42 [2022-01-18 16:04:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:04:00,226 INFO L470 AbstractCegarLoop]: Abstraction has 54544 states and 139665 transitions. [2022-01-18 16:04:00,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:04:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 54544 states and 139665 transitions. [2022-01-18 16:04:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:04:00,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:04:00,261 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:04:00,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 16:04:00,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:04:00,461 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:04:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:04:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1722812019, now seen corresponding path program 146 times [2022-01-18 16:04:00,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:04:00,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140059965] [2022-01-18 16:04:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:04:00,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:04:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:04:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:04:00,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:04:00,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140059965] [2022-01-18 16:04:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140059965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:04:00,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496746320] [2022-01-18 16:04:00,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:04:00,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:04:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:04:00,512 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:04:00,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 16:04:00,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:04:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:04:00,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 16:04:00,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:04:00,832 INFO L353 Elim1Store]: treesize reduction 137, result has 48.7 percent of original size [2022-01-18 16:04:00,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 195 treesize of output 184 [2022-01-18 16:08:53,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:08:53,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 345 treesize of output 286 [2022-01-18 16:08:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:08:53,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:08:54,413 INFO L353 Elim1Store]: treesize reduction 328, result has 25.6 percent of original size [2022-01-18 16:08:54,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 212 treesize of output 278 [2022-01-18 16:08:54,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:08:54,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 296 [2022-01-18 16:08:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:08:55,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496746320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:08:55,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:08:55,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 31 [2022-01-18 16:08:55,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209123579] [2022-01-18 16:08:55,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:08:55,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:08:55,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:08:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:08:55,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:08:55,043 INFO L87 Difference]: Start difference. First operand 54544 states and 139665 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:08:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:08:55,615 INFO L93 Difference]: Finished difference Result 57230 states and 146445 transitions. [2022-01-18 16:08:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 16:08:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:08:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:08:55,761 INFO L225 Difference]: With dead ends: 57230 [2022-01-18 16:08:55,761 INFO L226 Difference]: Without dead ends: 57193 [2022-01-18 16:08:55,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:08:55,761 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 221 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:08:55,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1841 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 916 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2022-01-18 16:08:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57193 states. [2022-01-18 16:08:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57193 to 55615. [2022-01-18 16:08:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55615 states, 55614 states have (on average 2.5645700722839573) internal successors, (142626), 55614 states have internal predecessors, (142626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:08:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55615 states to 55615 states and 142626 transitions. [2022-01-18 16:08:57,067 INFO L78 Accepts]: Start accepts. Automaton has 55615 states and 142626 transitions. Word has length 42 [2022-01-18 16:08:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:08:57,067 INFO L470 AbstractCegarLoop]: Abstraction has 55615 states and 142626 transitions. [2022-01-18 16:08:57,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:08:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 55615 states and 142626 transitions. [2022-01-18 16:08:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:08:57,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:08:57,108 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:08:57,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 16:08:57,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:08:57,309 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:08:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:08:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1556147571, now seen corresponding path program 147 times [2022-01-18 16:08:57,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:08:57,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335798139] [2022-01-18 16:08:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:08:57,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:08:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:08:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:08:57,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:08:57,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335798139] [2022-01-18 16:08:57,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335798139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:08:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649178787] [2022-01-18 16:08:57,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:08:57,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:08:57,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:08:57,358 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:08:57,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 16:08:57,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 16:08:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:08:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 16:08:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:08:57,969 INFO L353 Elim1Store]: treesize reduction 130, result has 45.6 percent of original size [2022-01-18 16:08:57,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 248 treesize of output 203 [2022-01-18 16:08:58,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:08:58,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 447 treesize of output 286 [2022-01-18 16:08:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:08:58,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:08:59,326 INFO L353 Elim1Store]: treesize reduction 412, result has 22.1 percent of original size [2022-01-18 16:08:59,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 196 treesize of output 290 [2022-01-18 16:08:59,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:08:59,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 494 treesize of output 296 [2022-01-18 16:09:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:09:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649178787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:00,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:00,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-01-18 16:09:00,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310149745] [2022-01-18 16:09:00,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:00,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:09:00,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:09:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:09:00,073 INFO L87 Difference]: Start difference. First operand 55615 states and 142626 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:00,777 INFO L93 Difference]: Finished difference Result 58040 states and 148792 transitions. [2022-01-18 16:09:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 16:09:00,777 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:09:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:00,919 INFO L225 Difference]: With dead ends: 58040 [2022-01-18 16:09:00,919 INFO L226 Difference]: Without dead ends: 58006 [2022-01-18 16:09:00,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:09:00,920 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 334 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:00,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1445 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:09:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58006 states. [2022-01-18 16:09:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58006 to 56750. [2022-01-18 16:09:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56750 states, 56749 states have (on average 2.5700364764136814) internal successors, (145847), 56749 states have internal predecessors, (145847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56750 states to 56750 states and 145847 transitions. [2022-01-18 16:09:02,251 INFO L78 Accepts]: Start accepts. Automaton has 56750 states and 145847 transitions. Word has length 42 [2022-01-18 16:09:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:02,252 INFO L470 AbstractCegarLoop]: Abstraction has 56750 states and 145847 transitions. [2022-01-18 16:09:02,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 56750 states and 145847 transitions. [2022-01-18 16:09:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:09:02,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:02,290 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:02,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 16:09:02,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:02,490 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:09:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash 305402995, now seen corresponding path program 148 times [2022-01-18 16:09:02,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:02,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060650095] [2022-01-18 16:09:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:02,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:09:02,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060650095] [2022-01-18 16:09:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060650095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237663168] [2022-01-18 16:09:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:09:02,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:02,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:02,544 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:09:02,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 16:09:02,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:09:02,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 16:09:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:02,822 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-01-18 16:09:02,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 151 treesize of output 153 Received shutdown request... [2022-01-18 16:09:24,157 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 16:09:24,160 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 16:09:24,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 16:09:24,189 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:09:24,190 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 [2022-01-18 16:09:24,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:24,360 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 11ms.. [2022-01-18 16:09:24,362 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 16:09:24,362 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 16:09:24,364 INFO L732 BasicCegarLoop]: Path program histogram: [148, 2, 2, 1] [2022-01-18 16:09:24,365 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:09:24,365 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:09:24,366 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:09:24 BasicIcfg [2022-01-18 16:09:24,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:09:24,367 INFO L158 Benchmark]: Toolchain (without parser) took 802124.50ms. Allocated memory was 400.6MB in the beginning and 3.1GB in the end (delta: 2.7GB). Free memory was 366.2MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2022-01-18 16:09:24,367 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 400.6MB. Free memory is still 367.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:09:24,367 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.76ms. Allocated memory is still 400.6MB. Free memory was 366.2MB in the beginning and 364.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:09:24,367 INFO L158 Benchmark]: Boogie Preprocessor took 12.42ms. Allocated memory is still 400.6MB. Free memory was 364.6MB in the beginning and 363.7MB in the end (delta: 916.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:09:24,367 INFO L158 Benchmark]: RCFGBuilder took 199.75ms. Allocated memory is still 400.6MB. Free memory was 363.7MB in the beginning and 354.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 16:09:24,367 INFO L158 Benchmark]: TraceAbstraction took 801883.99ms. Allocated memory was 400.6MB in the beginning and 3.1GB in the end (delta: 2.7GB). Free memory was 354.2MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2022-01-18 16:09:24,369 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15ms. Allocated memory is still 400.6MB. Free memory is still 367.3MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 20.76ms. Allocated memory is still 400.6MB. Free memory was 366.2MB in the beginning and 364.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 12.42ms. Allocated memory is still 400.6MB. Free memory was 364.6MB in the beginning and 363.7MB in the end (delta: 916.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 199.75ms. Allocated memory is still 400.6MB. Free memory was 363.7MB in the beginning and 354.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 801883.99ms. Allocated memory was 400.6MB in the beginning and 3.1GB in the end (delta: 2.7GB). Free memory was 354.2MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. * 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: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 11ms.. - TimeoutResultAtElement [Line: 48]: 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 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 11ms.. - TimeoutResultAtElement [Line: 48]: 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 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 11ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 801.8s, OverallIterations: 153, TraceHistogramMax: 7, PathProgramHistogramMax: 148, EmptinessCheckTime: 1.3s, AutomataDifference: 167.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51181 SdHoareTripleChecker+Valid, 42.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51181 mSDsluCounter, 53372 SdHoareTripleChecker+Invalid, 35.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2348 IncrementalHoareTripleChecker+Unchecked, 69899 mSDsCounter, 13451 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 96328 IncrementalHoareTripleChecker+Invalid, 112127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13451 mSolverCounterUnsat, 4721 mSDtfsCounter, 96328 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18403 GetRequests, 7206 SyntacticMatches, 103 SemanticMatches, 11094 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431831 ImplicationChecksByTransitivity, 141.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56750occurred in iteration=152, InterpolantAutomatonStates: 8393, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 35.9s AutomataMinimizationTime, 152 MinimizatonAttempts, 267799 StatesRemovedByMinimization, 152 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 540.7s InterpolantComputationTime, 9664 NumberOfCodeBlocks, 9664 NumberOfCodeBlocksAsserted, 747 NumberOfCheckSat, 14010 ConstructedInterpolants, 107 QuantifiedInterpolants, 181780 SizeOfPredicates, 916 NumberOfNonLiveVariables, 13685 ConjunctsInSsa, 2723 ConjunctsInUnsatCore, 446 InterpolantComputations, 6 PerfectInterpolantSequences, 7556/21626 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