/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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:54:55,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:54:55,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:54:55,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:54:55,462 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 17:54:55,491 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:54:55,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:54:55,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:54:55,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:54:55,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:54:55,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:54:55,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:54:55,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:54:55,494 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:54:55,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:54:55,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:54:55,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:54:55,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:54:55,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:54:55,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:54:55,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:54:55,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:54:55,496 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:54:55,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:54:55,496 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:54:55,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:54:55,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:54:55,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:54:55,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:54:55,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:54:55,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:54:55,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:54:55,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:54:55,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:54:55,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:54:55,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:54:55,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:54:55,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:54:55,499 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:54:55,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:54:55,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:54:55,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:54:55,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:54:55,724 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:54:55,725 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:54:55,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2022-01-18 17:54:55,727 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2022-01-18 17:54:55,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:54:55,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:54:55,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:54:55,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:54:55,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:54:55,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,781 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:54:55,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:54:55,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:54:55,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:54:55,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:54:55,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:54:55,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:54:55,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:54:55,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:54:55,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/1) ... [2022-01-18 17:54:55,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:54:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:55,845 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 17:54:55,848 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 17:54:55,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:54:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:54:55,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:54:55,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:54:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:54:55,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:54:55,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:54:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:54:55,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:54:55,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 17:54:55,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 17:54:55,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 17:54:55,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 17:54:55,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 17:54:55,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 17:54:55,878 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 17:54:55,914 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:54:55,915 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:54:55,992 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:54:56,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:54:56,008 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:54:56,010 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:54:56 BoogieIcfgContainer [2022-01-18 17:54:56,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:54:56,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:54:56,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:54:56,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:54:56,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:55" (1/2) ... [2022-01-18 17:54:56,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764512bc and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:54:56, skipping insertion in model container [2022-01-18 17:54:56,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:54:56" (2/2) ... [2022-01-18 17:54:56,016 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2022-01-18 17:54:56,020 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:54:56,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:54:56,020 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:54:56,020 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:54:56,054 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 17:54:56,089 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:54:56,095 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 17:54:56,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 17:54:56,103 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2022-01-18 17:54:56,266 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 17:54:56,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:56,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:56,293 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:54:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:56,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1576666978, now seen corresponding path program 1 times [2022-01-18 17:54:56,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:56,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463006922] [2022-01-18 17:54:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:56,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:56,431 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 17:54:56,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:56,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463006922] [2022-01-18 17:54:56,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463006922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:54:56,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:54:56,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 17:54:56,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768995769] [2022-01-18 17:54:56,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:54:56,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:54:56,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:54:56,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:54:56,472 INFO L87 Difference]: Start difference. First operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:56,548 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2022-01-18 17:54:56,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:54:56,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 17:54:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:56,584 INFO L225 Difference]: With dead ends: 854 [2022-01-18 17:54:56,584 INFO L226 Difference]: Without dead ends: 823 [2022-01-18 17:54:56,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:54:56,588 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:56,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:54:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-18 17:54:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2022-01-18 17:54:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2022-01-18 17:54:56,728 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2022-01-18 17:54:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:56,729 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2022-01-18 17:54:56,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2022-01-18 17:54:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:54:56,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:56,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:56,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:54:56,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:54:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1245579906, now seen corresponding path program 1 times [2022-01-18 17:54:56,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214566981] [2022-01-18 17:54:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:56,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:56,800 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 17:54:56,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214566981] [2022-01-18 17:54:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214566981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742431905] [2022-01-18 17:54:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:56,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:56,803 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 17:54:56,819 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 17:54:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 17:54:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:56,978 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 17:54:56,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:57,092 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 17:54:57,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742431905] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:57,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:54:57,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-01-18 17:54:57,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518813816] [2022-01-18 17:54:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:54:57,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:54:57,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:54:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:54:57,095 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:57,193 INFO L93 Difference]: Finished difference Result 1262 states and 4751 transitions. [2022-01-18 17:54:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:54:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:54:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:57,202 INFO L225 Difference]: With dead ends: 1262 [2022-01-18 17:54:57,202 INFO L226 Difference]: Without dead ends: 1262 [2022-01-18 17:54:57,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:54:57,208 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:57,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:54:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-01-18 17:54:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 692. [2022-01-18 17:54:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.962373371924747) internal successors, (2738), 691 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2738 transitions. [2022-01-18 17:54:57,245 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2738 transitions. Word has length 21 [2022-01-18 17:54:57,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:57,245 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2738 transitions. [2022-01-18 17:54:57,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2738 transitions. [2022-01-18 17:54:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:54:57,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:57,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:57,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 17:54:57,451 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 17:54:57,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:54:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash 117815332, now seen corresponding path program 1 times [2022-01-18 17:54:57,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:57,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628771074] [2022-01-18 17:54:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:57,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:57,518 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 17:54:57,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628771074] [2022-01-18 17:54:57,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628771074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:57,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631804690] [2022-01-18 17:54:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:57,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:57,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:57,520 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 17:54:57,523 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 17:54:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 17:54:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:57,622 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 17:54:57,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:57,725 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 17:54:57,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631804690] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:57,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:54:57,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-01-18 17:54:57,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645104831] [2022-01-18 17:54:57,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:54:57,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:54:57,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:54:57,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:54:57,728 INFO L87 Difference]: Start difference. First operand 692 states and 2738 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:57,807 INFO L93 Difference]: Finished difference Result 1343 states and 5074 transitions. [2022-01-18 17:54:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:54:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:54:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:57,817 INFO L225 Difference]: With dead ends: 1343 [2022-01-18 17:54:57,817 INFO L226 Difference]: Without dead ends: 1343 [2022-01-18 17:54:57,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:54:57,820 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:57,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:54:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-01-18 17:54:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 797. [2022-01-18 17:54:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 4.006281407035176) internal successors, (3189), 796 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 3189 transitions. [2022-01-18 17:54:57,872 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 3189 transitions. Word has length 21 [2022-01-18 17:54:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:57,873 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 3189 transitions. [2022-01-18 17:54:57,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 3189 transitions. [2022-01-18 17:54:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:54:57,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:57,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:57,902 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 17:54:58,099 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,SelfDestructingSolverStorable2 [2022-01-18 17:54:58,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:54:58,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1519093540, now seen corresponding path program 1 times [2022-01-18 17:54:58,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:58,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184423208] [2022-01-18 17:54:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:58,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:58,166 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 17:54:58,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184423208] [2022-01-18 17:54:58,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184423208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:54:58,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:54:58,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:54:58,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800161390] [2022-01-18 17:54:58,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:54:58,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:54:58,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:58,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:54:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:54:58,174 INFO L87 Difference]: Start difference. First operand 797 states and 3189 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:58,288 INFO L93 Difference]: Finished difference Result 1019 states and 3647 transitions. [2022-01-18 17:54:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:54:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:54:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:58,295 INFO L225 Difference]: With dead ends: 1019 [2022-01-18 17:54:58,295 INFO L226 Difference]: Without dead ends: 906 [2022-01-18 17:54:58,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:54:58,297 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:58,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 35 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:54:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-01-18 17:54:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 775. [2022-01-18 17:54:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.739018087855297) internal successors, (2894), 774 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2894 transitions. [2022-01-18 17:54:58,329 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2894 transitions. Word has length 21 [2022-01-18 17:54:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:58,329 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2894 transitions. [2022-01-18 17:54:58,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2894 transitions. [2022-01-18 17:54:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:54:58,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:58,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:58,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 17:54:58,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:54:58,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1969827620, now seen corresponding path program 2 times [2022-01-18 17:54:58,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:58,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656958025] [2022-01-18 17:54:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:58,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:58,376 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 17:54:58,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656958025] [2022-01-18 17:54:58,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656958025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:54:58,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:54:58,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:54:58,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638609541] [2022-01-18 17:54:58,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:54:58,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:54:58,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:54:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:54:58,381 INFO L87 Difference]: Start difference. First operand 775 states and 2894 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:58,441 INFO L93 Difference]: Finished difference Result 930 states and 3513 transitions. [2022-01-18 17:54:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:54:58,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:54:58,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:58,456 INFO L225 Difference]: With dead ends: 930 [2022-01-18 17:54:58,456 INFO L226 Difference]: Without dead ends: 930 [2022-01-18 17:54:58,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:54:58,458 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:58,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 28 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:54:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-18 17:54:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 658. [2022-01-18 17:54:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.8158295281582952) internal successors, (2507), 657 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2507 transitions. [2022-01-18 17:54:58,486 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2507 transitions. Word has length 21 [2022-01-18 17:54:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:58,486 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2507 transitions. [2022-01-18 17:54:58,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2507 transitions. [2022-01-18 17:54:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:54:58,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:58,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:58,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 17:54:58,490 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:54:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash -229280956, now seen corresponding path program 1 times [2022-01-18 17:54:58,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:58,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780557380] [2022-01-18 17:54:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:58,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:58,570 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 17:54:58,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780557380] [2022-01-18 17:54:58,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780557380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274552566] [2022-01-18 17:54:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:58,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:58,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:58,576 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 17:54:58,588 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 17:54:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:54:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:58,662 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 17:54:58,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274552566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:58,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:58,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-01-18 17:54:58,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143180861] [2022-01-18 17:54:58,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:58,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:54:58,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:58,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:54:58,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:54:58,782 INFO L87 Difference]: Start difference. First operand 658 states and 2507 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:58,992 INFO L93 Difference]: Finished difference Result 1938 states and 7091 transitions. [2022-01-18 17:54:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:54:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:54:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:59,004 INFO L225 Difference]: With dead ends: 1938 [2022-01-18 17:54:59,005 INFO L226 Difference]: Without dead ends: 1938 [2022-01-18 17:54:59,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:54:59,006 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 142 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:59,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 82 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:54:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2022-01-18 17:54:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 916. [2022-01-18 17:54:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.8) internal successors, (3477), 915 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3477 transitions. [2022-01-18 17:54:59,046 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3477 transitions. Word has length 23 [2022-01-18 17:54:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:59,046 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3477 transitions. [2022-01-18 17:54:59,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3477 transitions. [2022-01-18 17:54:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:54:59,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:59,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:59,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 17:54:59,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:59,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:54:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 869839812, now seen corresponding path program 1 times [2022-01-18 17:54:59,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:59,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646209674] [2022-01-18 17:54:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:59,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:59,327 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 17:54:59,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:59,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646209674] [2022-01-18 17:54:59,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646209674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:59,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859560136] [2022-01-18 17:54:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:59,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:59,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:59,329 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 17:54:59,331 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 17:54:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:54:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:59,434 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 17:54:59,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:59,561 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 17:54:59,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859560136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:59,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:59,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 17:54:59,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263882390] [2022-01-18 17:54:59,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:59,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:54:59,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:54:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:54:59,562 INFO L87 Difference]: Start difference. First operand 916 states and 3477 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:59,860 INFO L93 Difference]: Finished difference Result 2103 states and 7751 transitions. [2022-01-18 17:54:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:54:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:54:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:59,873 INFO L225 Difference]: With dead ends: 2103 [2022-01-18 17:54:59,873 INFO L226 Difference]: Without dead ends: 1818 [2022-01-18 17:54:59,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:54:59,875 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 64 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:59,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 191 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:54:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-01-18 17:54:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1131. [2022-01-18 17:54:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.842477876106195) internal successors, (4342), 1130 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4342 transitions. [2022-01-18 17:54:59,921 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4342 transitions. Word has length 23 [2022-01-18 17:54:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:59,924 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 4342 transitions. [2022-01-18 17:54:59,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4342 transitions. [2022-01-18 17:54:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:54:59,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:59,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:54:59,955 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 17:55:00,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:00,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:00,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash -640056498, now seen corresponding path program 2 times [2022-01-18 17:55:00,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:00,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398544622] [2022-01-18 17:55:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:00,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:00,232 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 17:55:00,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398544622] [2022-01-18 17:55:00,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398544622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167207069] [2022-01-18 17:55:00,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:55:00,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:00,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:00,234 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 17:55:00,235 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 17:55:00,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:00,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:55:00,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:00,353 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 17:55:00,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:00,524 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 17:55:00,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167207069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:00,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:00,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 17:55:00,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122982213] [2022-01-18 17:55:00,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:00,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:55:00,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:55:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:55:00,526 INFO L87 Difference]: Start difference. First operand 1131 states and 4342 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:00,798 INFO L93 Difference]: Finished difference Result 1972 states and 7446 transitions. [2022-01-18 17:55:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:55:00,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:00,811 INFO L225 Difference]: With dead ends: 1972 [2022-01-18 17:55:00,811 INFO L226 Difference]: Without dead ends: 1887 [2022-01-18 17:55:00,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:55:00,812 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:00,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 87 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2022-01-18 17:55:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1293. [2022-01-18 17:55:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.876934984520124) internal successors, (5009), 1292 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 5009 transitions. [2022-01-18 17:55:00,855 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 5009 transitions. Word has length 23 [2022-01-18 17:55:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:00,855 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 5009 transitions. [2022-01-18 17:55:00,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 5009 transitions. [2022-01-18 17:55:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:00,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:00,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:00,883 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 17:55:01,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:01,078 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash -151839806, now seen corresponding path program 3 times [2022-01-18 17:55:01,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401153309] [2022-01-18 17:55:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:01,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:01,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401153309] [2022-01-18 17:55:01,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401153309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909215181] [2022-01-18 17:55:01,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:55:01,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:01,142 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 17:55:01,169 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 17:55:01,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:55:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:55:01,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:01,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:01,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909215181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:01,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:01,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 17:55:01,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959481334] [2022-01-18 17:55:01,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:01,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:55:01,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:55:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:55:01,398 INFO L87 Difference]: Start difference. First operand 1293 states and 5009 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:01,595 INFO L93 Difference]: Finished difference Result 2093 states and 7918 transitions. [2022-01-18 17:55:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:55:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:01,607 INFO L225 Difference]: With dead ends: 2093 [2022-01-18 17:55:01,608 INFO L226 Difference]: Without dead ends: 2038 [2022-01-18 17:55:01,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:55:01,608 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:01,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 87 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2022-01-18 17:55:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1558. [2022-01-18 17:55:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.897880539499037) internal successors, (6069), 1557 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 6069 transitions. [2022-01-18 17:55:01,660 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 6069 transitions. Word has length 23 [2022-01-18 17:55:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:01,660 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 6069 transitions. [2022-01-18 17:55:01,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 6069 transitions. [2022-01-18 17:55:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:01,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:01,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:01,690 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 17:55:01,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:01,879 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:01,880 INFO L85 PathProgramCache]: Analyzing trace with hash -277999770, now seen corresponding path program 1 times [2022-01-18 17:55:01,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:01,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792891183] [2022-01-18 17:55:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:01,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:01,932 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 17:55:01,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792891183] [2022-01-18 17:55:01,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792891183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098136329] [2022-01-18 17:55:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:01,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:01,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:01,934 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 17:55:01,959 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 17:55:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:01,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:55:01,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:02,025 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 17:55:02,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:02,124 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 17:55:02,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098136329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:02,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:02,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 17:55:02,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880790465] [2022-01-18 17:55:02,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:02,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:55:02,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:55:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:55:02,125 INFO L87 Difference]: Start difference. First operand 1558 states and 6069 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:02,299 INFO L93 Difference]: Finished difference Result 3079 states and 11859 transitions. [2022-01-18 17:55:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 17:55:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:02,312 INFO L225 Difference]: With dead ends: 3079 [2022-01-18 17:55:02,312 INFO L226 Difference]: Without dead ends: 3024 [2022-01-18 17:55:02,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:55:02,313 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 68 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:02,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 151 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-01-18 17:55:02,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1833. [2022-01-18 17:55:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.99617903930131) internal successors, (7321), 1832 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 7321 transitions. [2022-01-18 17:55:02,378 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 7321 transitions. Word has length 23 [2022-01-18 17:55:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:02,378 INFO L470 AbstractCegarLoop]: Abstraction has 1833 states and 7321 transitions. [2022-01-18 17:55:02,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 7321 transitions. [2022-01-18 17:55:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:02,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:02,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:02,409 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 17:55:02,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:02,607 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1737160546, now seen corresponding path program 2 times [2022-01-18 17:55:02,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:02,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956926028] [2022-01-18 17:55:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:02,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:02,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:02,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956926028] [2022-01-18 17:55:02,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956926028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:02,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947950147] [2022-01-18 17:55:02,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:55:02,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:02,665 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 17:55:02,665 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 17:55:02,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:02,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:02,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:55:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:02,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:02,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947950147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:02,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 17:55:02,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171940884] [2022-01-18 17:55:02,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:02,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:55:02,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:55:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:55:02,931 INFO L87 Difference]: Start difference. First operand 1833 states and 7321 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:03,163 INFO L93 Difference]: Finished difference Result 2822 states and 11041 transitions. [2022-01-18 17:55:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:55:03,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:03,174 INFO L225 Difference]: With dead ends: 2822 [2022-01-18 17:55:03,174 INFO L226 Difference]: Without dead ends: 2704 [2022-01-18 17:55:03,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:55:03,175 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:03,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 124 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2022-01-18 17:55:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2151. [2022-01-18 17:55:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 4.050697674418605) internal successors, (8709), 2150 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 8709 transitions. [2022-01-18 17:55:03,240 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 8709 transitions. Word has length 23 [2022-01-18 17:55:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:03,241 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 8709 transitions. [2022-01-18 17:55:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 8709 transitions. [2022-01-18 17:55:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:03,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:03,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:03,273 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 17:55:03,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 17:55:03,464 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash 786210190, now seen corresponding path program 3 times [2022-01-18 17:55:03,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:03,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148187440] [2022-01-18 17:55:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:03,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:03,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148187440] [2022-01-18 17:55:03,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148187440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894058647] [2022-01-18 17:55:03,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:55:03,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:03,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:03,516 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 17:55:03,541 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 17:55:03,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:55:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:55:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:03,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:55:03,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894058647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:03,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:03,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 17:55:03,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927428248] [2022-01-18 17:55:03,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:03,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:55:03,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:55:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:55:03,742 INFO L87 Difference]: Start difference. First operand 2151 states and 8709 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:03,943 INFO L93 Difference]: Finished difference Result 3397 states and 13566 transitions. [2022-01-18 17:55:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 17:55:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:03,956 INFO L225 Difference]: With dead ends: 3397 [2022-01-18 17:55:03,956 INFO L226 Difference]: Without dead ends: 3342 [2022-01-18 17:55:03,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:55:03,958 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:03,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 125 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2022-01-18 17:55:04,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2343. [2022-01-18 17:55:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.122544833475662) internal successors, (9655), 2342 states have internal predecessors, (9655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9655 transitions. [2022-01-18 17:55:04,046 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9655 transitions. Word has length 23 [2022-01-18 17:55:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:04,046 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 9655 transitions. [2022-01-18 17:55:04,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9655 transitions. [2022-01-18 17:55:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:04,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:04,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:04,083 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 17:55:04,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:04,277 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 33636326, now seen corresponding path program 1 times [2022-01-18 17:55:04,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:04,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851003699] [2022-01-18 17:55:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:04,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:04,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851003699] [2022-01-18 17:55:04,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851003699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:55:04,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:55:04,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:55:04,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622918087] [2022-01-18 17:55:04,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:55:04,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:55:04,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:04,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:55:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:55:04,302 INFO L87 Difference]: Start difference. First operand 2343 states and 9655 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:04,377 INFO L93 Difference]: Finished difference Result 2180 states and 8842 transitions. [2022-01-18 17:55:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:55:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:04,386 INFO L225 Difference]: With dead ends: 2180 [2022-01-18 17:55:04,386 INFO L226 Difference]: Without dead ends: 2137 [2022-01-18 17:55:04,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:55:04,387 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:04,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-01-18 17:55:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1749. [2022-01-18 17:55:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 4.060640732265446) internal successors, (7098), 1748 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 7098 transitions. [2022-01-18 17:55:04,433 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 7098 transitions. Word has length 23 [2022-01-18 17:55:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:04,433 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 7098 transitions. [2022-01-18 17:55:04,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 7098 transitions. [2022-01-18 17:55:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:04,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:04,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:04,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 17:55:04,438 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash -25922294, now seen corresponding path program 2 times [2022-01-18 17:55:04,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:04,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97192099] [2022-01-18 17:55:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:04,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:04,460 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 17:55:04,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97192099] [2022-01-18 17:55:04,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97192099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658458749] [2022-01-18 17:55:04,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:55:04,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:04,461 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 17:55:04,463 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 17:55:04,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:04,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:55:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:04,546 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 17:55:04,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:04,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658458749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:04,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:04,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-01-18 17:55:04,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672877524] [2022-01-18 17:55:04,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:04,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:55:04,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:55:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:55:04,651 INFO L87 Difference]: Start difference. First operand 1749 states and 7098 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 17:55:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:04,954 INFO L93 Difference]: Finished difference Result 4870 states and 18610 transitions. [2022-01-18 17:55:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 17:55:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 23 [2022-01-18 17:55:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:04,973 INFO L225 Difference]: With dead ends: 4870 [2022-01-18 17:55:04,973 INFO L226 Difference]: Without dead ends: 4870 [2022-01-18 17:55:04,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:55:04,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:04,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 101 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-01-18 17:55:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 2341. [2022-01-18 17:55:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 4.21025641025641) internal successors, (9852), 2340 states have internal predecessors, (9852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 9852 transitions. [2022-01-18 17:55:05,060 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 9852 transitions. Word has length 23 [2022-01-18 17:55:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:05,060 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 9852 transitions. [2022-01-18 17:55:05,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 17:55:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 9852 transitions. [2022-01-18 17:55:05,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:05,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:05,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:05,091 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 17:55:05,281 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,SelfDestructingSolverStorable13 [2022-01-18 17:55:05,281 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1475647550, now seen corresponding path program 3 times [2022-01-18 17:55:05,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:05,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784993674] [2022-01-18 17:55:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:05,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:05,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784993674] [2022-01-18 17:55:05,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784993674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757807555] [2022-01-18 17:55:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:55:05,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:05,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:05,303 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 17:55:05,334 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 17:55:05,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:55:05,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:55:05,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:05,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:05,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757807555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:05,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:05,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-01-18 17:55:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683307744] [2022-01-18 17:55:05,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:05,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:55:05,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:55:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:55:05,483 INFO L87 Difference]: Start difference. First operand 2341 states and 9852 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 17:55:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:05,774 INFO L93 Difference]: Finished difference Result 4654 states and 18685 transitions. [2022-01-18 17:55:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:55:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 23 [2022-01-18 17:55:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:05,792 INFO L225 Difference]: With dead ends: 4654 [2022-01-18 17:55:05,793 INFO L226 Difference]: Without dead ends: 4654 [2022-01-18 17:55:05,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:55:05,795 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 266 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:05,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 62 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2022-01-18 17:55:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 2562. [2022-01-18 17:55:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 4.310035142522453) internal successors, (11038), 2561 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 11038 transitions. [2022-01-18 17:55:05,887 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 11038 transitions. Word has length 23 [2022-01-18 17:55:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:05,888 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 11038 transitions. [2022-01-18 17:55:05,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 17:55:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 11038 transitions. [2022-01-18 17:55:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:05,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:05,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:05,923 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 17:55:06,111 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,SelfDestructingSolverStorable14 [2022-01-18 17:55:06,111 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 970212618, now seen corresponding path program 2 times [2022-01-18 17:55:06,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25481535] [2022-01-18 17:55:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:06,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:06,141 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 17:55:06,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:06,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25481535] [2022-01-18 17:55:06,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25481535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:06,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043018732] [2022-01-18 17:55:06,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:55:06,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:06,143 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 17:55:06,144 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 17:55:06,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:06,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:55:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:06,224 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 17:55:06,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:06,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043018732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:06,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:06,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-01-18 17:55:06,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910329558] [2022-01-18 17:55:06,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:06,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:55:06,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:55:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:55:06,329 INFO L87 Difference]: Start difference. First operand 2562 states and 11038 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 17:55:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:06,517 INFO L93 Difference]: Finished difference Result 4928 states and 20191 transitions. [2022-01-18 17:55:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:55:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 23 [2022-01-18 17:55:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:06,536 INFO L225 Difference]: With dead ends: 4928 [2022-01-18 17:55:06,537 INFO L226 Difference]: Without dead ends: 4928 [2022-01-18 17:55:06,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:55:06,537 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:06,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 87 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:06,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2022-01-18 17:55:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 2970. [2022-01-18 17:55:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.287638935668575) internal successors, (12730), 2969 states have internal predecessors, (12730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12730 transitions. [2022-01-18 17:55:06,681 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12730 transitions. Word has length 23 [2022-01-18 17:55:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:06,681 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 12730 transitions. [2022-01-18 17:55:06,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 17:55:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12730 transitions. [2022-01-18 17:55:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:06,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:06,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:06,708 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 17:55:06,899 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,SelfDestructingSolverStorable15 [2022-01-18 17:55:06,900 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1118399754, now seen corresponding path program 3 times [2022-01-18 17:55:06,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:06,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006448332] [2022-01-18 17:55:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:06,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:06,936 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 17:55:06,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006448332] [2022-01-18 17:55:06,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006448332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229327423] [2022-01-18 17:55:06,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:55:06,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:06,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:06,938 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 17:55:06,939 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 17:55:06,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:55:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:55:06,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:07,025 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 17:55:07,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:07,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229327423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:07,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:07,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-01-18 17:55:07,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802301573] [2022-01-18 17:55:07,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:07,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:55:07,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:55:07,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:55:07,120 INFO L87 Difference]: Start difference. First operand 2970 states and 12730 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:07,452 INFO L93 Difference]: Finished difference Result 7558 states and 30662 transitions. [2022-01-18 17:55:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 17:55:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:07,486 INFO L225 Difference]: With dead ends: 7558 [2022-01-18 17:55:07,486 INFO L226 Difference]: Without dead ends: 7558 [2022-01-18 17:55:07,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:55:07,487 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:07,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 120 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7558 states. [2022-01-18 17:55:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7558 to 4354. [2022-01-18 17:55:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.402940500804043) internal successors, (19166), 4353 states have internal predecessors, (19166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 19166 transitions. [2022-01-18 17:55:07,640 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 19166 transitions. Word has length 23 [2022-01-18 17:55:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:07,640 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 19166 transitions. [2022-01-18 17:55:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 19166 transitions. [2022-01-18 17:55:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:55:07,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:07,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:07,679 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 17:55:07,875 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,SelfDestructingSolverStorable16 [2022-01-18 17:55:07,875 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1188293318, now seen corresponding path program 4 times [2022-01-18 17:55:07,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:07,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845480066] [2022-01-18 17:55:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:07,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:07,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845480066] [2022-01-18 17:55:07,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845480066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556045555] [2022-01-18 17:55:07,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:55:07,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:07,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:07,905 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 17:55:07,906 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 17:55:07,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:55:07,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:55:07,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:07,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:08,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556045555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:08,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:08,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-01-18 17:55:08,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911845727] [2022-01-18 17:55:08,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:08,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:55:08,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:08,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:55:08,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:55:08,099 INFO L87 Difference]: Start difference. First operand 4354 states and 19166 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:08,451 INFO L93 Difference]: Finished difference Result 7822 states and 32925 transitions. [2022-01-18 17:55:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:55:08,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:55:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:08,517 INFO L225 Difference]: With dead ends: 7822 [2022-01-18 17:55:08,517 INFO L226 Difference]: Without dead ends: 7822 [2022-01-18 17:55:08,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:55:08,518 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 184 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:08,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 77 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-01-18 17:55:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 4648. [2022-01-18 17:55:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 4.46460081773187) internal successors, (20747), 4647 states have internal predecessors, (20747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 20747 transitions. [2022-01-18 17:55:08,666 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 20747 transitions. Word has length 23 [2022-01-18 17:55:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:08,667 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 20747 transitions. [2022-01-18 17:55:08,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 20747 transitions. [2022-01-18 17:55:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:08,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:08,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:08,703 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 17:55:08,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:08,891 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1541563518, now seen corresponding path program 4 times [2022-01-18 17:55:08,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962806034] [2022-01-18 17:55:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:08,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:08,931 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 17:55:08,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:08,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962806034] [2022-01-18 17:55:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962806034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:08,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869436295] [2022-01-18 17:55:08,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:55:08,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:08,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:08,932 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 17:55:08,939 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 17:55:08,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:55:08,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:08,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:09,025 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 17:55:09,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:09,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869436295] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:09,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:55:09,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-01-18 17:55:09,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92283621] [2022-01-18 17:55:09,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:55:09,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:55:09,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:55:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:55:09,175 INFO L87 Difference]: Start difference. First operand 4648 states and 20747 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:09,366 INFO L93 Difference]: Finished difference Result 7073 states and 30775 transitions. [2022-01-18 17:55:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 17:55:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:55:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:09,392 INFO L225 Difference]: With dead ends: 7073 [2022-01-18 17:55:09,392 INFO L226 Difference]: Without dead ends: 7073 [2022-01-18 17:55:09,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:55:09,393 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:09,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 59 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2022-01-18 17:55:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 4730. [2022-01-18 17:55:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4729 states have (on average 4.45760203002749) internal successors, (21080), 4729 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 21080 transitions. [2022-01-18 17:55:09,534 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 21080 transitions. Word has length 25 [2022-01-18 17:55:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:09,534 INFO L470 AbstractCegarLoop]: Abstraction has 4730 states and 21080 transitions. [2022-01-18 17:55:09,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 21080 transitions. [2022-01-18 17:55:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:09,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:09,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:09,575 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 17:55:09,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:09,760 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash -231361658, now seen corresponding path program 4 times [2022-01-18 17:55:09,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:09,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145073107] [2022-01-18 17:55:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:09,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:09,837 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 17:55:09,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145073107] [2022-01-18 17:55:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145073107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073972143] [2022-01-18 17:55:09,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:55:09,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:09,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:09,838 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 17:55:09,850 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 17:55:09,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:55:09,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:09,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:55:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:09,970 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 17:55:09,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:10,098 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 17:55:10,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073972143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:10,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:10,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 17:55:10,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916219848] [2022-01-18 17:55:10,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:10,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:55:10,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:55:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:55:10,099 INFO L87 Difference]: Start difference. First operand 4730 states and 21080 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:10,445 INFO L93 Difference]: Finished difference Result 6959 states and 29620 transitions. [2022-01-18 17:55:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:55:10,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:55:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:10,464 INFO L225 Difference]: With dead ends: 6959 [2022-01-18 17:55:10,464 INFO L226 Difference]: Without dead ends: 6862 [2022-01-18 17:55:10,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:55:10,465 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 116 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:10,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 384 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:55:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2022-01-18 17:55:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 5203. [2022-01-18 17:55:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5202 states have (on average 4.448289119569396) internal successors, (23140), 5202 states have internal predecessors, (23140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 23140 transitions. [2022-01-18 17:55:10,615 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 23140 transitions. Word has length 25 [2022-01-18 17:55:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:10,615 INFO L470 AbstractCegarLoop]: Abstraction has 5203 states and 23140 transitions. [2022-01-18 17:55:10,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 23140 transitions. [2022-01-18 17:55:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:10,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:10,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:10,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-18 17:55:10,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:10,851 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash 867759110, now seen corresponding path program 1 times [2022-01-18 17:55:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327854804] [2022-01-18 17:55:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:10,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:10,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:10,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327854804] [2022-01-18 17:55:10,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327854804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831736510] [2022-01-18 17:55:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:10,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:10,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:10,887 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 17:55:10,888 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 17:55:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:11,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:11,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831736510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:11,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:11,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-01-18 17:55:11,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435622249] [2022-01-18 17:55:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:11,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:55:11,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:55:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:55:11,141 INFO L87 Difference]: Start difference. First operand 5203 states and 23140 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 17:55:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:11,990 INFO L93 Difference]: Finished difference Result 16617 states and 68830 transitions. [2022-01-18 17:55:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:55:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 25 [2022-01-18 17:55:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:12,046 INFO L225 Difference]: With dead ends: 16617 [2022-01-18 17:55:12,046 INFO L226 Difference]: Without dead ends: 16551 [2022-01-18 17:55:12,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=890, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:55:12,047 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 487 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:12,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 179 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:55:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16551 states. [2022-01-18 17:55:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16551 to 7204. [2022-01-18 17:55:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 4.527974455088158) internal successors, (32615), 7203 states have internal predecessors, (32615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 32615 transitions. [2022-01-18 17:55:12,332 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 32615 transitions. Word has length 25 [2022-01-18 17:55:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:12,332 INFO L470 AbstractCegarLoop]: Abstraction has 7204 states and 32615 transitions. [2022-01-18 17:55:12,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 17:55:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 32615 transitions. [2022-01-18 17:55:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:12,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:12,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:12,381 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 17:55:12,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:12,567 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 937652674, now seen corresponding path program 2 times [2022-01-18 17:55:12,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:12,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917014153] [2022-01-18 17:55:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:12,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:12,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917014153] [2022-01-18 17:55:12,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917014153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37057954] [2022-01-18 17:55:12,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:55:12,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:12,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:12,607 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 17:55:12,637 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 17:55:12,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:12,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:12,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37057954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:12,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:12,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-01-18 17:55:12,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055193584] [2022-01-18 17:55:12,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:12,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:55:12,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:55:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:55:12,877 INFO L87 Difference]: Start difference. First operand 7204 states and 32615 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 17:55:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:13,760 INFO L93 Difference]: Finished difference Result 15330 states and 66058 transitions. [2022-01-18 17:55:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:55:13,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 25 [2022-01-18 17:55:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:13,822 INFO L225 Difference]: With dead ends: 15330 [2022-01-18 17:55:13,822 INFO L226 Difference]: Without dead ends: 15330 [2022-01-18 17:55:13,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=505, Invalid=977, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:55:13,823 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 542 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:13,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 143 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:55:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15330 states. [2022-01-18 17:55:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15330 to 9308. [2022-01-18 17:55:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 9307 states have (on average 4.566562802191899) internal successors, (42501), 9307 states have internal predecessors, (42501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 42501 transitions. [2022-01-18 17:55:14,165 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 42501 transitions. Word has length 25 [2022-01-18 17:55:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:14,165 INFO L470 AbstractCegarLoop]: Abstraction has 9308 states and 42501 transitions. [2022-01-18 17:55:14,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 17:55:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 42501 transitions. [2022-01-18 17:55:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:14,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:14,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:14,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-18 17:55:14,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:14,388 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 599012682, now seen corresponding path program 3 times [2022-01-18 17:55:14,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:14,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091301918] [2022-01-18 17:55:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:14,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:14,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091301918] [2022-01-18 17:55:14,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091301918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720988926] [2022-01-18 17:55:14,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:55:14,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:14,468 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 17:55:14,469 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 17:55:14,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:55:14,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:14,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:55:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:14,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:14,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720988926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:14,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:14,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:55:14,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670207441] [2022-01-18 17:55:14,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:14,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:55:14,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:14,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:55:14,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:55:14,896 INFO L87 Difference]: Start difference. First operand 9308 states and 42501 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:55:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:16,458 INFO L93 Difference]: Finished difference Result 43349 states and 187926 transitions. [2022-01-18 17:55:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:55:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 25 [2022-01-18 17:55:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:16,860 INFO L225 Difference]: With dead ends: 43349 [2022-01-18 17:55:16,860 INFO L226 Difference]: Without dead ends: 43226 [2022-01-18 17:55:16,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1109, Invalid=2673, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:55:16,863 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 890 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:16,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 196 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:55:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43226 states. [2022-01-18 17:55:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43226 to 18163. [2022-01-18 17:55:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18163 states, 18162 states have (on average 4.662482105494989) internal successors, (84680), 18162 states have internal predecessors, (84680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18163 states to 18163 states and 84680 transitions. [2022-01-18 17:55:17,765 INFO L78 Accepts]: Start accepts. Automaton has 18163 states and 84680 transitions. Word has length 25 [2022-01-18 17:55:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:17,765 INFO L470 AbstractCegarLoop]: Abstraction has 18163 states and 84680 transitions. [2022-01-18 17:55:17,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:55:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 18163 states and 84680 transitions. [2022-01-18 17:55:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:17,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:17,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:17,938 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 17:55:18,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:18,131 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 816040672, now seen corresponding path program 4 times [2022-01-18 17:55:18,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174062072] [2022-01-18 17:55:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:18,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:18,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174062072] [2022-01-18 17:55:18,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174062072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026982499] [2022-01-18 17:55:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:55:18,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:18,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:18,259 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 17:55:18,271 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 17:55:18,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:55:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:55:18,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:18,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:18,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026982499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:18,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:18,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:55:18,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543548401] [2022-01-18 17:55:18,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:18,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:55:18,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:55:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:55:18,663 INFO L87 Difference]: Start difference. First operand 18163 states and 84680 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:55:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:20,477 INFO L93 Difference]: Finished difference Result 42110 states and 182030 transitions. [2022-01-18 17:55:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:55:20,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 25 [2022-01-18 17:55:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:20,649 INFO L225 Difference]: With dead ends: 42110 [2022-01-18 17:55:20,649 INFO L226 Difference]: Without dead ends: 41954 [2022-01-18 17:55:20,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1036, Invalid=2746, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:55:20,650 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 701 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:20,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 273 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:55:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41954 states. [2022-01-18 17:55:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41954 to 19283. [2022-01-18 17:55:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19283 states, 19282 states have (on average 4.627476402862774) internal successors, (89227), 19282 states have internal predecessors, (89227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19283 states to 19283 states and 89227 transitions. [2022-01-18 17:55:21,663 INFO L78 Accepts]: Start accepts. Automaton has 19283 states and 89227 transitions. Word has length 25 [2022-01-18 17:55:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:21,663 INFO L470 AbstractCegarLoop]: Abstraction has 19283 states and 89227 transitions. [2022-01-18 17:55:21,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:55:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19283 states and 89227 transitions. [2022-01-18 17:55:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:21,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:21,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:21,729 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 17:55:21,914 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,SelfDestructingSolverStorable23 [2022-01-18 17:55:21,914 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -249609790, now seen corresponding path program 5 times [2022-01-18 17:55:21,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:21,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977122795] [2022-01-18 17:55:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:21,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:22,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977122795] [2022-01-18 17:55:22,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977122795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825254834] [2022-01-18 17:55:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:55:22,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:22,016 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 17:55:22,017 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 17:55:22,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:22,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:55:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:22,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:22,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825254834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:22,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:22,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:55:22,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762964270] [2022-01-18 17:55:22,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:22,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:55:22,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:22,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:55:22,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:55:22,740 INFO L87 Difference]: Start difference. First operand 19283 states and 89227 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 17:55:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:24,499 INFO L93 Difference]: Finished difference Result 40327 states and 177681 transitions. [2022-01-18 17:55:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:55:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 25 [2022-01-18 17:55:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:24,669 INFO L225 Difference]: With dead ends: 40327 [2022-01-18 17:55:24,669 INFO L226 Difference]: Without dead ends: 40123 [2022-01-18 17:55:24,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=1224, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 17:55:24,670 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 392 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:24,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 225 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:55:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40123 states. [2022-01-18 17:55:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40123 to 20179. [2022-01-18 17:55:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20179 states, 20178 states have (on average 4.661116067003667) internal successors, (94052), 20178 states have internal predecessors, (94052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20179 states to 20179 states and 94052 transitions. [2022-01-18 17:55:25,600 INFO L78 Accepts]: Start accepts. Automaton has 20179 states and 94052 transitions. Word has length 25 [2022-01-18 17:55:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:25,601 INFO L470 AbstractCegarLoop]: Abstraction has 20179 states and 94052 transitions. [2022-01-18 17:55:25,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 17:55:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 20179 states and 94052 transitions. [2022-01-18 17:55:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:25,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:25,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:25,688 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 17:55:25,885 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,SelfDestructingSolverStorable24 [2022-01-18 17:55:25,885 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash -629764328, now seen corresponding path program 6 times [2022-01-18 17:55:25,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31320697] [2022-01-18 17:55:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:25,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:25,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:25,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31320697] [2022-01-18 17:55:25,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31320697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:25,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913236721] [2022-01-18 17:55:25,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:55:25,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:25,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:25,974 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 17:55:25,974 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 17:55:25,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:55:25,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:55:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:26,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:26,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913236721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:26,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:26,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:55:26,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913160814] [2022-01-18 17:55:26,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:26,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:55:26,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:55:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:55:26,628 INFO L87 Difference]: Start difference. First operand 20179 states and 94052 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 17:55:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:28,945 INFO L93 Difference]: Finished difference Result 39840 states and 175243 transitions. [2022-01-18 17:55:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:55:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 25 [2022-01-18 17:55:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:29,103 INFO L225 Difference]: With dead ends: 39840 [2022-01-18 17:55:29,103 INFO L226 Difference]: Without dead ends: 38961 [2022-01-18 17:55:29,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:55:29,104 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 423 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:29,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 301 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:55:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38961 states. [2022-01-18 17:55:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38961 to 20002. [2022-01-18 17:55:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20002 states, 20001 states have (on average 4.644417779111045) internal successors, (92893), 20001 states have internal predecessors, (92893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 92893 transitions. [2022-01-18 17:55:29,856 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 92893 transitions. Word has length 25 [2022-01-18 17:55:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:29,856 INFO L470 AbstractCegarLoop]: Abstraction has 20002 states and 92893 transitions. [2022-01-18 17:55:29,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 17:55:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 92893 transitions. [2022-01-18 17:55:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:30,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:30,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:30,083 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 17:55:30,268 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,SelfDestructingSolverStorable25 [2022-01-18 17:55:30,269 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash 50816006, now seen corresponding path program 7 times [2022-01-18 17:55:30,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052716599] [2022-01-18 17:55:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:30,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:30,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052716599] [2022-01-18 17:55:30,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052716599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172167819] [2022-01-18 17:55:30,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:55:30,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:30,332 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 17:55:30,333 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 17:55:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:30,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:55:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:30,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:30,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172167819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:30,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:30,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:55:30,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703119644] [2022-01-18 17:55:30,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:30,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:55:30,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:30,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:55:30,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:55:30,675 INFO L87 Difference]: Start difference. First operand 20002 states and 92893 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:55:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:32,122 INFO L93 Difference]: Finished difference Result 52489 states and 232133 transitions. [2022-01-18 17:55:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:55:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 25 [2022-01-18 17:55:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:32,367 INFO L225 Difference]: With dead ends: 52489 [2022-01-18 17:55:32,368 INFO L226 Difference]: Without dead ends: 52306 [2022-01-18 17:55:32,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1407, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:55:32,368 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 663 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:32,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 283 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:55:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52306 states. [2022-01-18 17:55:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52306 to 25506. [2022-01-18 17:55:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25506 states, 25505 states have (on average 4.6938639482454425) internal successors, (119717), 25505 states have internal predecessors, (119717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25506 states to 25506 states and 119717 transitions. [2022-01-18 17:55:33,570 INFO L78 Accepts]: Start accepts. Automaton has 25506 states and 119717 transitions. Word has length 25 [2022-01-18 17:55:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:33,570 INFO L470 AbstractCegarLoop]: Abstraction has 25506 states and 119717 transitions. [2022-01-18 17:55:33,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:55:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 25506 states and 119717 transitions. [2022-01-18 17:55:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:33,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:33,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:33,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 17:55:33,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:33,837 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:33,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2095354754, now seen corresponding path program 8 times [2022-01-18 17:55:33,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:33,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906117451] [2022-01-18 17:55:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:33,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:33,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906117451] [2022-01-18 17:55:33,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906117451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634841785] [2022-01-18 17:55:33,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:55:33,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:33,926 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 17:55:33,927 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 17:55:33,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:33,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:33,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:55:33,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:34,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:34,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634841785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:34,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:55:34,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761544675] [2022-01-18 17:55:34,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:34,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:55:34,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:55:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:55:34,480 INFO L87 Difference]: Start difference. First operand 25506 states and 119717 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 17:55:36,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:36,623 INFO L93 Difference]: Finished difference Result 47186 states and 211684 transitions. [2022-01-18 17:55:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:55:36,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 25 [2022-01-18 17:55:36,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:36,834 INFO L225 Difference]: With dead ends: 47186 [2022-01-18 17:55:36,834 INFO L226 Difference]: Without dead ends: 46797 [2022-01-18 17:55:36,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:55:36,835 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 362 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:36,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 392 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1819 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:55:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46797 states. [2022-01-18 17:55:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46797 to 25503. [2022-01-18 17:55:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25503 states, 25502 states have (on average 4.692965257626853) internal successors, (119680), 25502 states have internal predecessors, (119680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25503 states to 25503 states and 119680 transitions. [2022-01-18 17:55:37,924 INFO L78 Accepts]: Start accepts. Automaton has 25503 states and 119680 transitions. Word has length 25 [2022-01-18 17:55:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:37,924 INFO L470 AbstractCegarLoop]: Abstraction has 25503 states and 119680 transitions. [2022-01-18 17:55:37,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 17:55:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 25503 states and 119680 transitions. [2022-01-18 17:55:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:37,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:37,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:38,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 17:55:38,190 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,SelfDestructingSolverStorable27 [2022-01-18 17:55:38,190 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 863019782, now seen corresponding path program 1 times [2022-01-18 17:55:38,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:38,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913127699] [2022-01-18 17:55:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:38,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:38,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913127699] [2022-01-18 17:55:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913127699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876680585] [2022-01-18 17:55:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:38,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:38,230 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 17:55:38,231 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 17:55:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:38,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:38,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876680585] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:38,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:55:38,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6] total 14 [2022-01-18 17:55:38,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207968834] [2022-01-18 17:55:38,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:55:38,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:55:38,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:55:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:55:38,450 INFO L87 Difference]: Start difference. First operand 25503 states and 119680 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:38,984 INFO L93 Difference]: Finished difference Result 30985 states and 143944 transitions. [2022-01-18 17:55:38,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 17:55:38,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:55:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:39,162 INFO L225 Difference]: With dead ends: 30985 [2022-01-18 17:55:39,162 INFO L226 Difference]: Without dead ends: 30967 [2022-01-18 17:55:39,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:55:39,163 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:39,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 36 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30967 states. [2022-01-18 17:55:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30967 to 25809. [2022-01-18 17:55:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25809 states, 25808 states have (on average 4.691568505889647) internal successors, (121080), 25808 states have internal predecessors, (121080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25809 states to 25809 states and 121080 transitions. [2022-01-18 17:55:40,036 INFO L78 Accepts]: Start accepts. Automaton has 25809 states and 121080 transitions. Word has length 25 [2022-01-18 17:55:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:40,036 INFO L470 AbstractCegarLoop]: Abstraction has 25809 states and 121080 transitions. [2022-01-18 17:55:40,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25809 states and 121080 transitions. [2022-01-18 17:55:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:40,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:40,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:40,120 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 17:55:40,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 17:55:40,306 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1313753862, now seen corresponding path program 2 times [2022-01-18 17:55:40,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:40,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193092400] [2022-01-18 17:55:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:40,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:40,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:40,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193092400] [2022-01-18 17:55:40,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193092400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:40,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271036501] [2022-01-18 17:55:40,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:55:40,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:40,344 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 17:55:40,344 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 17:55:40,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:40,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:40,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:40,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:40,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271036501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:40,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:40,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2022-01-18 17:55:40,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530111830] [2022-01-18 17:55:40,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:40,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:55:40,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:55:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:55:40,603 INFO L87 Difference]: Start difference. First operand 25809 states and 121080 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 17:55:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:41,584 INFO L93 Difference]: Finished difference Result 42598 states and 191600 transitions. [2022-01-18 17:55:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 17:55:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 25 [2022-01-18 17:55:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:41,795 INFO L225 Difference]: With dead ends: 42598 [2022-01-18 17:55:41,795 INFO L226 Difference]: Without dead ends: 42549 [2022-01-18 17:55:41,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:55:41,796 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 363 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:41,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 149 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42549 states. [2022-01-18 17:55:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42549 to 28164. [2022-01-18 17:55:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28164 states, 28163 states have (on average 4.6866455988353515) internal successors, (131990), 28163 states have internal predecessors, (131990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28164 states to 28164 states and 131990 transitions. [2022-01-18 17:55:42,849 INFO L78 Accepts]: Start accepts. Automaton has 28164 states and 131990 transitions. Word has length 25 [2022-01-18 17:55:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:42,849 INFO L470 AbstractCegarLoop]: Abstraction has 28164 states and 131990 transitions. [2022-01-18 17:55:42,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 17:55:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 28164 states and 131990 transitions. [2022-01-18 17:55:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:42,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:42,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:42,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 17:55:43,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:43,123 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1690592450, now seen corresponding path program 3 times [2022-01-18 17:55:43,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:43,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840644472] [2022-01-18 17:55:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:43,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:43,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840644472] [2022-01-18 17:55:43,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840644472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867664586] [2022-01-18 17:55:43,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:55:43,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:43,160 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 17:55:43,161 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 17:55:43,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:55:43,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:43,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 17:55:43,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867664586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:55:43,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 17:55:43,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-01-18 17:55:43,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019903727] [2022-01-18 17:55:43,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:55:43,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:55:43,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:43,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:55:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:55:43,265 INFO L87 Difference]: Start difference. First operand 28164 states and 131990 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:43,956 INFO L93 Difference]: Finished difference Result 37387 states and 169578 transitions. [2022-01-18 17:55:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:55:43,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:55:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:44,124 INFO L225 Difference]: With dead ends: 37387 [2022-01-18 17:55:44,124 INFO L226 Difference]: Without dead ends: 37305 [2022-01-18 17:55:44,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:55:44,125 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:44,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 98 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:55:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37305 states. [2022-01-18 17:55:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37305 to 28147. [2022-01-18 17:55:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28147 states, 28146 states have (on average 4.679457116464151) internal successors, (131708), 28146 states have internal predecessors, (131708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28147 states to 28147 states and 131708 transitions. [2022-01-18 17:55:45,181 INFO L78 Accepts]: Start accepts. Automaton has 28147 states and 131708 transitions. Word has length 25 [2022-01-18 17:55:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:45,181 INFO L470 AbstractCegarLoop]: Abstraction has 28147 states and 131708 transitions. [2022-01-18 17:55:45,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28147 states and 131708 transitions. [2022-01-18 17:55:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:45,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:45,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:45,279 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 17:55:45,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:45,464 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash -48618236, now seen corresponding path program 5 times [2022-01-18 17:55:45,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:45,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879233274] [2022-01-18 17:55:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:45,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:45,542 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 17:55:45,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:45,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879233274] [2022-01-18 17:55:45,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879233274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:45,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233722340] [2022-01-18 17:55:45,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:55:45,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:45,543 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 17:55:45,545 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 17:55:45,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:55:45,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:55:45,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:45,645 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 17:55:45,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:45,759 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 17:55:45,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233722340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:45,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:45,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 17:55:45,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407613620] [2022-01-18 17:55:45,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:45,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:55:45,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:55:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:55:45,760 INFO L87 Difference]: Start difference. First operand 28147 states and 131708 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:46,277 INFO L93 Difference]: Finished difference Result 30690 states and 141720 transitions. [2022-01-18 17:55:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:55:46,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:55:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:46,409 INFO L225 Difference]: With dead ends: 30690 [2022-01-18 17:55:46,409 INFO L226 Difference]: Without dead ends: 30593 [2022-01-18 17:55:46,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:55:46,410 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 93 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:46,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 268 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30593 states. [2022-01-18 17:55:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30593 to 28417. [2022-01-18 17:55:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28417 states, 28416 states have (on average 4.682819538288288) internal successors, (133067), 28416 states have internal predecessors, (133067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28417 states to 28417 states and 133067 transitions. [2022-01-18 17:55:47,778 INFO L78 Accepts]: Start accepts. Automaton has 28417 states and 133067 transitions. Word has length 25 [2022-01-18 17:55:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:47,778 INFO L470 AbstractCegarLoop]: Abstraction has 28417 states and 133067 transitions. [2022-01-18 17:55:47,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 28417 states and 133067 transitions. [2022-01-18 17:55:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:47,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:47,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:47,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 17:55:48,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:48,058 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1120396096, now seen corresponding path program 9 times [2022-01-18 17:55:48,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:48,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057992068] [2022-01-18 17:55:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:48,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:48,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057992068] [2022-01-18 17:55:48,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057992068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049484052] [2022-01-18 17:55:48,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:55:48,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:48,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:48,099 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 17:55:48,100 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 17:55:48,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:55:48,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:48,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:48,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:48,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049484052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:48,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:48,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-01-18 17:55:48,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99688216] [2022-01-18 17:55:48,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:48,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:55:48,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:48,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:55:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:55:48,365 INFO L87 Difference]: Start difference. First operand 28417 states and 133067 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 17:55:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:49,334 INFO L93 Difference]: Finished difference Result 69496 states and 320413 transitions. [2022-01-18 17:55:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:55:49,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 25 [2022-01-18 17:55:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:49,981 INFO L225 Difference]: With dead ends: 69496 [2022-01-18 17:55:49,981 INFO L226 Difference]: Without dead ends: 69496 [2022-01-18 17:55:49,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:55:49,982 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 238 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:49,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 111 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:55:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69496 states. [2022-01-18 17:55:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69496 to 47698. [2022-01-18 17:55:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47698 states, 47697 states have (on average 4.730402331383525) internal successors, (225626), 47697 states have internal predecessors, (225626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47698 states to 47698 states and 225626 transitions. [2022-01-18 17:55:51,772 INFO L78 Accepts]: Start accepts. Automaton has 47698 states and 225626 transitions. Word has length 25 [2022-01-18 17:55:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:51,772 INFO L470 AbstractCegarLoop]: Abstraction has 47698 states and 225626 transitions. [2022-01-18 17:55:51,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 17:55:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 47698 states and 225626 transitions. [2022-01-18 17:55:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:52,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:52,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:52,280 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 17:55:52,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:52,476 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash -362078012, now seen corresponding path program 6 times [2022-01-18 17:55:52,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:52,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482770369] [2022-01-18 17:55:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:52,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:52,550 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 17:55:52,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:52,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482770369] [2022-01-18 17:55:52,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482770369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:52,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14222261] [2022-01-18 17:55:52,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:55:52,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:52,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:52,552 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 17:55:52,557 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 17:55:52,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:55:52,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:52,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:55:52,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:52,657 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 17:55:52,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:52,823 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 17:55:52,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14222261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:52,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:52,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:55:52,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989008369] [2022-01-18 17:55:52,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:52,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:55:52,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:55:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:55:52,825 INFO L87 Difference]: Start difference. First operand 47698 states and 225626 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 17:55:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:53,484 INFO L93 Difference]: Finished difference Result 49499 states and 232603 transitions. [2022-01-18 17:55:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:55:53,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 25 [2022-01-18 17:55:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:53,706 INFO L225 Difference]: With dead ends: 49499 [2022-01-18 17:55:53,706 INFO L226 Difference]: Without dead ends: 49305 [2022-01-18 17:55:53,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:55:53,707 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 110 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:53,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 212 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49305 states. [2022-01-18 17:55:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49305 to 47824. [2022-01-18 17:55:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47824 states, 47823 states have (on average 4.73075716705351) internal successors, (226239), 47823 states have internal predecessors, (226239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47824 states to 47824 states and 226239 transitions. [2022-01-18 17:55:55,512 INFO L78 Accepts]: Start accepts. Automaton has 47824 states and 226239 transitions. Word has length 25 [2022-01-18 17:55:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:55,512 INFO L470 AbstractCegarLoop]: Abstraction has 47824 states and 226239 transitions. [2022-01-18 17:55:55,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 17:55:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 47824 states and 226239 transitions. [2022-01-18 17:55:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:55,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:55,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:55,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 17:55:55,836 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,SelfDestructingSolverStorable33 [2022-01-18 17:55:55,837 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:55,837 INFO L85 PathProgramCache]: Analyzing trace with hash 994663360, now seen corresponding path program 7 times [2022-01-18 17:55:55,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:55,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747085480] [2022-01-18 17:55:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:55,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:55,914 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 17:55:55,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747085480] [2022-01-18 17:55:55,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747085480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398105980] [2022-01-18 17:55:55,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:55:55,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:55,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:55,915 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 17:55:55,916 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 17:55:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:55,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:55:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:56,014 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 17:55:56,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:56,167 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 17:55:56,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398105980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:56,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:56,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:55:56,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37651825] [2022-01-18 17:55:56,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:56,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:55:56,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:56,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:55:56,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:55:56,168 INFO L87 Difference]: Start difference. First operand 47824 states and 226239 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:55:56,746 INFO L93 Difference]: Finished difference Result 49199 states and 231557 transitions. [2022-01-18 17:55:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:55:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:55:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:55:57,348 INFO L225 Difference]: With dead ends: 49199 [2022-01-18 17:55:57,349 INFO L226 Difference]: Without dead ends: 49026 [2022-01-18 17:55:57,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:55:57,349 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:55:57,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 207 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:55:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49026 states. [2022-01-18 17:55:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49026 to 47970. [2022-01-18 17:55:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47970 states, 47969 states have (on average 4.731534949654986) internal successors, (226967), 47969 states have internal predecessors, (226967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47970 states to 47970 states and 226967 transitions. [2022-01-18 17:55:58,851 INFO L78 Accepts]: Start accepts. Automaton has 47970 states and 226967 transitions. Word has length 25 [2022-01-18 17:55:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:55:58,851 INFO L470 AbstractCegarLoop]: Abstraction has 47970 states and 226967 transitions. [2022-01-18 17:55:58,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:55:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 47970 states and 226967 transitions. [2022-01-18 17:55:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:55:58,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:55:58,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:55:58,987 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 17:55:59,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:59,173 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:55:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:55:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -417418548, now seen corresponding path program 10 times [2022-01-18 17:55:59,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:55:59,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092133293] [2022-01-18 17:55:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:55:59,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:55:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:55:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:59,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:55:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092133293] [2022-01-18 17:55:59,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092133293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:55:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905985486] [2022-01-18 17:55:59,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:55:59,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:55:59,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:55:59,207 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 17:55:59,207 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 17:55:59,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:55:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:55:59,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:55:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:55:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:59,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:55:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:55:59,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905985486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:55:59,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:55:59,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-01-18 17:55:59,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484672782] [2022-01-18 17:55:59,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:55:59,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:55:59,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:55:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:55:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:55:59,426 INFO L87 Difference]: Start difference. First operand 47970 states and 226967 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 17:56:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:56:01,115 INFO L93 Difference]: Finished difference Result 108096 states and 492688 transitions. [2022-01-18 17:56:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:56:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 25 [2022-01-18 17:56:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:56:01,683 INFO L225 Difference]: With dead ends: 108096 [2022-01-18 17:56:01,683 INFO L226 Difference]: Without dead ends: 107887 [2022-01-18 17:56:01,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:56:01,684 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 290 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:56:01,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 234 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:56:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107887 states. [2022-01-18 17:56:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107887 to 93158. [2022-01-18 17:56:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93158 states, 93157 states have (on average 4.627596423242483) internal successors, (431093), 93157 states have internal predecessors, (431093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:56:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93158 states to 93158 states and 431093 transitions. [2022-01-18 17:56:05,659 INFO L78 Accepts]: Start accepts. Automaton has 93158 states and 431093 transitions. Word has length 25 [2022-01-18 17:56:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:56:05,660 INFO L470 AbstractCegarLoop]: Abstraction has 93158 states and 431093 transitions. [2022-01-18 17:56:05,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 17:56:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 93158 states and 431093 transitions. [2022-01-18 17:56:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:56:05,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:56:05,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:56:05,904 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 17:56:06,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:56:06,089 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:56:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:56:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash -823215352, now seen corresponding path program 11 times [2022-01-18 17:56:06,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:56:06,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062374077] [2022-01-18 17:56:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:56:06,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:56:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:56:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:06,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:56:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062374077] [2022-01-18 17:56:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062374077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:56:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048372396] [2022-01-18 17:56:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:56:06,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:56:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:56:06,156 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 17:56:06,157 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 17:56:06,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:56:06,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:56:06,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:56:06,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:56:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:06,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:56:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048372396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:56:07,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:56:07,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:56:07,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701363395] [2022-01-18 17:56:07,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:56:07,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:56:07,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:56:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:56:07,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:56:07,026 INFO L87 Difference]: Start difference. First operand 93158 states and 431093 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 17:56:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:56:11,762 INFO L93 Difference]: Finished difference Result 262758 states and 1182106 transitions. [2022-01-18 17:56:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 17:56:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 25 [2022-01-18 17:56:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:56:13,610 INFO L225 Difference]: With dead ends: 262758 [2022-01-18 17:56:13,611 INFO L226 Difference]: Without dead ends: 262524 [2022-01-18 17:56:13,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1397, Invalid=3159, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:56:13,612 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 573 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:56:13,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 338 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:56:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262524 states. [2022-01-18 17:56:20,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262524 to 153519. [2022-01-18 17:56:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153519 states, 153518 states have (on average 4.58576193019711) internal successors, (703997), 153518 states have internal predecessors, (703997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:56:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153519 states to 153519 states and 703997 transitions. [2022-01-18 17:56:22,811 INFO L78 Accepts]: Start accepts. Automaton has 153519 states and 703997 transitions. Word has length 25 [2022-01-18 17:56:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:56:22,812 INFO L470 AbstractCegarLoop]: Abstraction has 153519 states and 703997 transitions. [2022-01-18 17:56:22,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 17:56:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 153519 states and 703997 transitions. [2022-01-18 17:56:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:56:23,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:56:23,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:56:23,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 17:56:23,369 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,SelfDestructingSolverStorable36 [2022-01-18 17:56:23,369 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:56:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:56:23,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1589133496, now seen corresponding path program 12 times [2022-01-18 17:56:23,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:56:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107611834] [2022-01-18 17:56:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:56:23,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:56:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:56:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:23,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:56:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107611834] [2022-01-18 17:56:23,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107611834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:56:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568194968] [2022-01-18 17:56:23,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:56:23,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:56:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:56:23,427 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 17:56:23,427 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 17:56:23,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:56:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:56:23,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:56:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:56:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:23,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:56:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:24,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568194968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:56:24,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:56:24,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:56:24,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082141906] [2022-01-18 17:56:24,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:56:24,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:56:24,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:56:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:56:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:56:24,487 INFO L87 Difference]: Start difference. First operand 153519 states and 703997 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:56:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:56:29,603 INFO L93 Difference]: Finished difference Result 330266 states and 1479418 transitions. [2022-01-18 17:56:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 17:56:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 25 [2022-01-18 17:56:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:56:32,616 INFO L225 Difference]: With dead ends: 330266 [2022-01-18 17:56:32,616 INFO L226 Difference]: Without dead ends: 330266 [2022-01-18 17:56:32,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1342, Invalid=3214, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:56:32,617 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 747 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:56:32,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 314 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:56:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330266 states. [2022-01-18 17:56:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330266 to 199056. [2022-01-18 17:56:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199056 states, 199055 states have (on average 4.607776745120695) internal successors, (917201), 199055 states have internal predecessors, (917201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:56:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199056 states to 199056 states and 917201 transitions. [2022-01-18 17:56:44,718 INFO L78 Accepts]: Start accepts. Automaton has 199056 states and 917201 transitions. Word has length 25 [2022-01-18 17:56:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:56:44,718 INFO L470 AbstractCegarLoop]: Abstraction has 199056 states and 917201 transitions. [2022-01-18 17:56:44,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:56:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 199056 states and 917201 transitions. [2022-01-18 17:56:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:56:45,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:56:45,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:56:45,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 17:56:45,397 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,SelfDestructingSolverStorable37 [2022-01-18 17:56:45,398 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:56:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:56:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash -606187362, now seen corresponding path program 13 times [2022-01-18 17:56:45,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:56:45,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633897768] [2022-01-18 17:56:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:56:45,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:56:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:56:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:45,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:56:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633897768] [2022-01-18 17:56:45,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633897768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:56:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43415989] [2022-01-18 17:56:45,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:56:45,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:56:45,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:56:45,455 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 17:56:45,456 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 17:56:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:56:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:56:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:56:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:45,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:56:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:56:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43415989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:56:45,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:56:45,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:56:45,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132854051] [2022-01-18 17:56:45,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:56:45,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:56:45,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:56:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:56:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:56:45,823 INFO L87 Difference]: Start difference. First operand 199056 states and 917201 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:56:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:56:50,372 INFO L93 Difference]: Finished difference Result 272500 states and 1225177 transitions. [2022-01-18 17:56:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:56:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 25 [2022-01-18 17:56:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:56:52,884 INFO L225 Difference]: With dead ends: 272500 [2022-01-18 17:56:52,884 INFO L226 Difference]: Without dead ends: 272269 [2022-01-18 17:56:52,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=928, Invalid=2264, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:56:52,885 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 547 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:56:52,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 487 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:56:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272269 states. [2022-01-18 17:57:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272269 to 201570. [2022-01-18 17:57:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201570 states, 201569 states have (on average 4.602304917918926) internal successors, (927682), 201569 states have internal predecessors, (927682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:57:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201570 states to 201570 states and 927682 transitions. [2022-01-18 17:57:03,714 INFO L78 Accepts]: Start accepts. Automaton has 201570 states and 927682 transitions. Word has length 25 [2022-01-18 17:57:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:57:03,714 INFO L470 AbstractCegarLoop]: Abstraction has 201570 states and 927682 transitions. [2022-01-18 17:57:03,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:57:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 201570 states and 927682 transitions. [2022-01-18 17:57:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:57:04,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:57:04,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:57:04,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 17:57:04,708 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,SelfDestructingSolverStorable38 [2022-01-18 17:57:04,709 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:57:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:57:04,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1468668168, now seen corresponding path program 14 times [2022-01-18 17:57:04,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:57:04,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532224236] [2022-01-18 17:57:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:57:04,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:57:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:57:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:04,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:57:04,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532224236] [2022-01-18 17:57:04,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532224236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:57:04,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987777324] [2022-01-18 17:57:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:57:04,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:57:04,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:57:04,830 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 17:57:04,832 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 17:57:04,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:57:04,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:57:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:57:04,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:57:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:05,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:57:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:05,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987777324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:57:05,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:57:05,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-01-18 17:57:05,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100675478] [2022-01-18 17:57:05,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:57:05,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:57:05,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:57:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:57:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:57:05,510 INFO L87 Difference]: Start difference. First operand 201570 states and 927682 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 17:57:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:57:11,414 INFO L93 Difference]: Finished difference Result 266946 states and 1207930 transitions. [2022-01-18 17:57:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:57:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 25 [2022-01-18 17:57:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:57:12,931 INFO L225 Difference]: With dead ends: 266946 [2022-01-18 17:57:12,932 INFO L226 Difference]: Without dead ends: 266520 [2022-01-18 17:57:12,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:57:12,932 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 362 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:57:12,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 293 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:57:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266520 states. [2022-01-18 17:57:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266520 to 207040. [2022-01-18 17:57:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207040 states, 207039 states have (on average 4.61873366853588) internal successors, (956258), 207039 states have internal predecessors, (956258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:57:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207040 states to 207040 states and 956258 transitions. [2022-01-18 17:57:21,724 INFO L78 Accepts]: Start accepts. Automaton has 207040 states and 956258 transitions. Word has length 25 [2022-01-18 17:57:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:57:21,725 INFO L470 AbstractCegarLoop]: Abstraction has 207040 states and 956258 transitions. [2022-01-18 17:57:21,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 17:57:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 207040 states and 956258 transitions. [2022-01-18 17:57:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:57:22,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:57:22,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:57:22,195 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 17:57:22,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 17:57:22,381 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:57:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:57:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1088513630, now seen corresponding path program 15 times [2022-01-18 17:57:22,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:57:22,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127225895] [2022-01-18 17:57:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:57:22,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:57:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:57:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:22,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:57:22,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127225895] [2022-01-18 17:57:22,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127225895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:57:22,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561798175] [2022-01-18 17:57:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:57:22,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:57:22,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:57:22,455 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 17:57:22,458 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 17:57:22,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:57:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:57:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:57:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:57:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:22,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:57:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:22,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561798175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:57:22,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:57:22,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-01-18 17:57:22,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748243214] [2022-01-18 17:57:22,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:57:22,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:57:22,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:57:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:57:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:57:22,994 INFO L87 Difference]: Start difference. First operand 207040 states and 956258 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 17:57:27,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:57:27,226 INFO L93 Difference]: Finished difference Result 280619 states and 1273483 transitions. [2022-01-18 17:57:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:57:27,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 25 [2022-01-18 17:57:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:57:29,524 INFO L225 Difference]: With dead ends: 280619 [2022-01-18 17:57:29,525 INFO L226 Difference]: Without dead ends: 279921 [2022-01-18 17:57:29,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=1440, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:57:29,525 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 351 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:57:29,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 272 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:57:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279921 states. [2022-01-18 17:57:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279921 to 207582. [2022-01-18 17:57:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207582 states, 207581 states have (on average 4.619536470100828) internal successors, (958928), 207581 states have internal predecessors, (958928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:57:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207582 states to 207582 states and 958928 transitions. [2022-01-18 17:57:38,860 INFO L78 Accepts]: Start accepts. Automaton has 207582 states and 958928 transitions. Word has length 25 [2022-01-18 17:57:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:57:38,860 INFO L470 AbstractCegarLoop]: Abstraction has 207582 states and 958928 transitions. [2022-01-18 17:57:38,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 17:57:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 207582 states and 958928 transitions. [2022-01-18 17:57:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:57:39,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:57:39,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:57:39,359 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 17:57:39,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:57:39,544 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:57:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:57:39,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1418787674, now seen corresponding path program 16 times [2022-01-18 17:57:39,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:57:39,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545192750] [2022-01-18 17:57:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:57:39,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:57:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:57:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:39,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:57:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545192750] [2022-01-18 17:57:39,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545192750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:57:39,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561108331] [2022-01-18 17:57:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:57:39,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:57:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:57:39,614 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 17:57:39,614 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 17:57:39,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:57:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:57:39,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:57:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:57:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:39,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:57:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:57:40,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561108331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:57:40,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:57:40,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-01-18 17:57:40,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75249532] [2022-01-18 17:57:40,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:57:40,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:57:40,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:57:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:57:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:57:40,123 INFO L87 Difference]: Start difference. First operand 207582 states and 958928 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:57:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:57:44,541 INFO L93 Difference]: Finished difference Result 298525 states and 1353381 transitions. [2022-01-18 17:57:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:57:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:57:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:57:47,007 INFO L225 Difference]: With dead ends: 298525 [2022-01-18 17:57:47,008 INFO L226 Difference]: Without dead ends: 298229 [2022-01-18 17:57:47,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=1189, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:57:47,008 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 371 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:57:47,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 239 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:57:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298229 states. [2022-01-18 17:57:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298229 to 208261. [2022-01-18 17:57:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208261 states, 208260 states have (on average 4.618692979928935) internal successors, (961889), 208260 states have internal predecessors, (961889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:57:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208261 states to 208261 states and 961889 transitions. [2022-01-18 17:57:56,705 INFO L78 Accepts]: Start accepts. Automaton has 208261 states and 961889 transitions. Word has length 25 [2022-01-18 17:57:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:57:56,705 INFO L470 AbstractCegarLoop]: Abstraction has 208261 states and 961889 transitions. [2022-01-18 17:57:56,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:57:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 208261 states and 961889 transitions. [2022-01-18 17:57:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:57:57,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:57:57,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:57:57,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 17:57:57,375 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,SelfDestructingSolverStorable41 [2022-01-18 17:57:57,375 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:57:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:57:57,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1719960572, now seen corresponding path program 5 times [2022-01-18 17:57:57,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:57:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810087887] [2022-01-18 17:57:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:57:57,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:57:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:57:57,418 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 17:57:57,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:57:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810087887] [2022-01-18 17:57:57,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810087887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:57:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716164840] [2022-01-18 17:57:57,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:57:57,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:57:57,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:57:57,419 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 17:57:57,420 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 17:57:57,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:57:57,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:57:57,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:57:57,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:57:57,523 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 17:57:57,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:57:57,640 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 17:57:57,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716164840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:57:57,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:57:57,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 17:57:57,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601701616] [2022-01-18 17:57:57,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:57:57,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:57:57,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:57:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:57:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:57:57,641 INFO L87 Difference]: Start difference. First operand 208261 states and 961889 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 17:58:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:58:01,923 INFO L93 Difference]: Finished difference Result 260038 states and 1192644 transitions. [2022-01-18 17:58:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:58:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 25 [2022-01-18 17:58:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:58:03,979 INFO L225 Difference]: With dead ends: 260038 [2022-01-18 17:58:03,979 INFO L226 Difference]: Without dead ends: 259989 [2022-01-18 17:58:03,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:58:03,980 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 351 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:58:03,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 135 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:58:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259989 states. [2022-01-18 17:58:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259989 to 212361. [2022-01-18 17:58:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212361 states, 212360 states have (on average 4.627462799020531) internal successors, (982688), 212360 states have internal predecessors, (982688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:58:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212361 states to 212361 states and 982688 transitions. [2022-01-18 17:58:13,506 INFO L78 Accepts]: Start accepts. Automaton has 212361 states and 982688 transitions. Word has length 25 [2022-01-18 17:58:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:58:13,506 INFO L470 AbstractCegarLoop]: Abstraction has 212361 states and 982688 transitions. [2022-01-18 17:58:13,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 17:58:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 212361 states and 982688 transitions. [2022-01-18 17:58:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:58:13,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:58:13,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:58:13,997 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 17:58:14,182 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,SelfDestructingSolverStorable42 [2022-01-18 17:58:14,182 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:58:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:58:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1718549628, now seen corresponding path program 4 times [2022-01-18 17:58:14,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:58:14,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165150186] [2022-01-18 17:58:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:58:14,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:58:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:58:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:14,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:58:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165150186] [2022-01-18 17:58:14,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165150186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:58:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067258729] [2022-01-18 17:58:14,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:58:14,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:58:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:58:14,235 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 17:58:14,236 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 17:58:14,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:58:14,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:58:14,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:58:14,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:58:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:14,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:58:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:14,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067258729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:58:14,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:58:14,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 13 [2022-01-18 17:58:14,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204203603] [2022-01-18 17:58:14,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:58:14,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:58:14,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:58:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:58:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:58:14,483 INFO L87 Difference]: Start difference. First operand 212361 states and 982688 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 17:58:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:58:17,567 INFO L93 Difference]: Finished difference Result 229775 states and 1055842 transitions. [2022-01-18 17:58:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:58:17,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 25 [2022-01-18 17:58:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:58:18,846 INFO L225 Difference]: With dead ends: 229775 [2022-01-18 17:58:18,846 INFO L226 Difference]: Without dead ends: 229757 [2022-01-18 17:58:18,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:58:18,846 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 206 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:58:18,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 108 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:58:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229757 states. [2022-01-18 17:58:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229757 to 212525. [2022-01-18 17:58:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212525 states, 212524 states have (on average 4.627698518755529) internal successors, (983497), 212524 states have internal predecessors, (983497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:58:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212525 states to 212525 states and 983497 transitions. [2022-01-18 17:58:27,675 INFO L78 Accepts]: Start accepts. Automaton has 212525 states and 983497 transitions. Word has length 25 [2022-01-18 17:58:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:58:27,675 INFO L470 AbstractCegarLoop]: Abstraction has 212525 states and 983497 transitions. [2022-01-18 17:58:27,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 17:58:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 212525 states and 983497 transitions. [2022-01-18 17:58:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:58:28,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:58:28,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:58:28,201 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 17:58:28,386 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,SelfDestructingSolverStorable43 [2022-01-18 17:58:28,386 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:58:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:58:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash -173141082, now seen corresponding path program 5 times [2022-01-18 17:58:28,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:58:28,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165764915] [2022-01-18 17:58:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:58:28,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:58:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:58:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:28,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:58:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165764915] [2022-01-18 17:58:28,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165764915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:58:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139537585] [2022-01-18 17:58:28,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:58:28,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:58:28,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:58:28,422 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 17:58:28,423 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 17:58:28,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:58:28,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:58:28,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:58:28,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:58:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:28,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:58:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:28,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139537585] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:58:28,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:58:28,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6] total 13 [2022-01-18 17:58:28,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442505637] [2022-01-18 17:58:28,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:58:28,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:58:28,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:58:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:58:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:58:28,654 INFO L87 Difference]: Start difference. First operand 212525 states and 983497 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:58:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:58:30,941 INFO L93 Difference]: Finished difference Result 238221 states and 1091394 transitions. [2022-01-18 17:58:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 17:58:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:58:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:58:32,927 INFO L225 Difference]: With dead ends: 238221 [2022-01-18 17:58:32,927 INFO L226 Difference]: Without dead ends: 238203 [2022-01-18 17:58:32,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:58:32,928 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:58:32,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 40 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:58:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238203 states. [2022-01-18 17:58:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238203 to 212582. [2022-01-18 17:58:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212582 states, 212581 states have (on average 4.627530212013303) internal successors, (983725), 212581 states have internal predecessors, (983725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:58:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212582 states to 212582 states and 983725 transitions. [2022-01-18 17:58:41,357 INFO L78 Accepts]: Start accepts. Automaton has 212582 states and 983725 transitions. Word has length 25 [2022-01-18 17:58:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:58:41,357 INFO L470 AbstractCegarLoop]: Abstraction has 212582 states and 983725 transitions. [2022-01-18 17:58:41,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:58:41,357 INFO L276 IsEmpty]: Start isEmpty. Operand 212582 states and 983725 transitions. [2022-01-18 17:58:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:58:42,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:58:42,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:58:42,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 17:58:42,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:58:42,817 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:58:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:58:42,817 INFO L85 PathProgramCache]: Analyzing trace with hash 365477176, now seen corresponding path program 6 times [2022-01-18 17:58:42,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:58:42,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867248205] [2022-01-18 17:58:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:58:42,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:58:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:58:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:42,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:58:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867248205] [2022-01-18 17:58:42,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867248205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:58:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609923057] [2022-01-18 17:58:42,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:58:42,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:58:42,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:58:42,862 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 17:58:42,862 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 17:58:42,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:58:42,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:58:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:58:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:58:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:42,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:58:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:58:43,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609923057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:58:43,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:58:43,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 13 [2022-01-18 17:58:43,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733970137] [2022-01-18 17:58:43,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:58:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:58:43,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:58:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:58:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:58:43,162 INFO L87 Difference]: Start difference. First operand 212582 states and 983725 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 17:58:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:58:46,979 INFO L93 Difference]: Finished difference Result 320511 states and 1434893 transitions. [2022-01-18 17:58:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:58:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2022-01-18 17:58:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:58:48,855 INFO L225 Difference]: With dead ends: 320511 [2022-01-18 17:58:48,855 INFO L226 Difference]: Without dead ends: 320475 [2022-01-18 17:58:48,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:58:48,856 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:58:48,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 200 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:58:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320475 states. [2022-01-18 17:58:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320475 to 230390. [2022-01-18 17:58:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230390 states, 230389 states have (on average 4.602394211529196) internal successors, (1060341), 230389 states have internal predecessors, (1060341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:58:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230390 states to 230390 states and 1060341 transitions. [2022-01-18 17:58:59,697 INFO L78 Accepts]: Start accepts. Automaton has 230390 states and 1060341 transitions. Word has length 25 [2022-01-18 17:58:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:58:59,697 INFO L470 AbstractCegarLoop]: Abstraction has 230390 states and 1060341 transitions. [2022-01-18 17:58:59,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 17:58:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 230390 states and 1060341 transitions. [2022-01-18 17:59:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:59:00,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:59:00,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:59:00,228 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 17:59:00,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:59:00,414 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:59:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:59:00,414 INFO L85 PathProgramCache]: Analyzing trace with hash -520321104, now seen corresponding path program 7 times [2022-01-18 17:59:00,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:59:00,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74669191] [2022-01-18 17:59:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:59:00,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:59:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:59:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:00,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:59:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74669191] [2022-01-18 17:59:00,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74669191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:59:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707111690] [2022-01-18 17:59:00,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:59:00,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:59:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:59:00,493 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 17:59:00,521 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 17:59:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:59:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:59:00,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:59:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:00,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:59:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:01,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707111690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:59:01,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:59:01,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-01-18 17:59:01,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450439080] [2022-01-18 17:59:01,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:59:01,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:59:01,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:59:01,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:59:01,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:59:01,025 INFO L87 Difference]: Start difference. First operand 230390 states and 1060341 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 17:59:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:59:06,306 INFO L93 Difference]: Finished difference Result 267748 states and 1210999 transitions. [2022-01-18 17:59:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:59:06,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 25 [2022-01-18 17:59:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:59:08,470 INFO L225 Difference]: With dead ends: 267748 [2022-01-18 17:59:08,471 INFO L226 Difference]: Without dead ends: 266916 [2022-01-18 17:59:08,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:59:08,471 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 245 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:59:08,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 400 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 17:59:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266916 states. [2022-01-18 17:59:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266916 to 230614. [2022-01-18 17:59:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230614 states, 230613 states have (on average 4.602069267560806) internal successors, (1061297), 230613 states have internal predecessors, (1061297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:59:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230614 states to 230614 states and 1061297 transitions. [2022-01-18 17:59:19,062 INFO L78 Accepts]: Start accepts. Automaton has 230614 states and 1061297 transitions. Word has length 25 [2022-01-18 17:59:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:59:19,062 INFO L470 AbstractCegarLoop]: Abstraction has 230614 states and 1061297 transitions. [2022-01-18 17:59:19,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 17:59:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 230614 states and 1061297 transitions. [2022-01-18 17:59:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:59:19,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:59:19,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:59:19,644 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 17:59:19,835 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,SelfDestructingSolverStorable46 [2022-01-18 17:59:19,835 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:59:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:59:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash 999511228, now seen corresponding path program 8 times [2022-01-18 17:59:19,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:59:19,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027628755] [2022-01-18 17:59:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:59:19,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:59:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:59:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:19,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:59:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027628755] [2022-01-18 17:59:19,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027628755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:59:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486933649] [2022-01-18 17:59:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:59:19,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:59:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:59:19,886 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 17:59:19,887 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 17:59:19,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:59:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:59:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:59:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:59:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:59:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:20,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486933649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:59:20,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:59:20,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 16 [2022-01-18 17:59:20,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451964295] [2022-01-18 17:59:20,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:59:20,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:59:20,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:59:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:59:20,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:59:20,222 INFO L87 Difference]: Start difference. First operand 230614 states and 1061297 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 17:59:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:59:26,467 INFO L93 Difference]: Finished difference Result 413825 states and 1852168 transitions. [2022-01-18 17:59:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 17:59:26,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 25 [2022-01-18 17:59:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:59:29,826 INFO L225 Difference]: With dead ends: 413825 [2022-01-18 17:59:29,826 INFO L226 Difference]: Without dead ends: 413813 [2022-01-18 17:59:29,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1204, Invalid=3626, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:59:29,847 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 769 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:59:29,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 196 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:59:30,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413813 states. [2022-01-18 17:59:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413813 to 280250. [2022-01-18 17:59:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280250 states, 280249 states have (on average 4.605258181117506) internal successors, (1290619), 280249 states have internal predecessors, (1290619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:59:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280250 states to 280250 states and 1290619 transitions. [2022-01-18 17:59:44,950 INFO L78 Accepts]: Start accepts. Automaton has 280250 states and 1290619 transitions. Word has length 25 [2022-01-18 17:59:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:59:44,951 INFO L470 AbstractCegarLoop]: Abstraction has 280250 states and 1290619 transitions. [2022-01-18 17:59:44,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 17:59:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 280250 states and 1290619 transitions. [2022-01-18 17:59:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:59:45,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:59:45,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:59:45,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 17:59:45,987 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,SelfDestructingSolverStorable47 [2022-01-18 17:59:45,987 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:59:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:59:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -59652642, now seen corresponding path program 9 times [2022-01-18 17:59:45,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:59:45,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440497419] [2022-01-18 17:59:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:59:45,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:59:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:59:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:46,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:59:46,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440497419] [2022-01-18 17:59:46,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440497419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:59:46,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590655252] [2022-01-18 17:59:46,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:59:46,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:59:46,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:59:46,037 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 17:59:46,040 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 17:59:46,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:59:46,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:59:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:59:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:59:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:46,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:59:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:59:46,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590655252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:59:46,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:59:46,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 16 [2022-01-18 17:59:46,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401525810] [2022-01-18 17:59:46,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:59:46,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:59:46,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:59:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:59:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:59:46,404 INFO L87 Difference]: Start difference. First operand 280250 states and 1290619 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 17:59:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:59:51,105 INFO L93 Difference]: Finished difference Result 351958 states and 1583315 transitions. [2022-01-18 17:59:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:59:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 25 [2022-01-18 17:59:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:59:54,040 INFO L225 Difference]: With dead ends: 351958 [2022-01-18 17:59:54,040 INFO L226 Difference]: Without dead ends: 351958 [2022-01-18 17:59:54,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:59:54,041 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 462 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:59:54,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 233 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:59:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351958 states. [2022-01-18 18:00:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351958 to 282995. [2022-01-18 18:00:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282995 states, 282994 states have (on average 4.603560499515891) internal successors, (1302780), 282994 states have internal predecessors, (1302780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:00:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282995 states to 282995 states and 1302780 transitions. [2022-01-18 18:00:08,570 INFO L78 Accepts]: Start accepts. Automaton has 282995 states and 1302780 transitions. Word has length 25 [2022-01-18 18:00:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:00:08,570 INFO L470 AbstractCegarLoop]: Abstraction has 282995 states and 1302780 transitions. [2022-01-18 18:00:08,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 18:00:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 282995 states and 1302780 transitions. [2022-01-18 18:00:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:00:09,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:00:09,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:00:09,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 18:00:09,498 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,SelfDestructingSolverStorable48 [2022-01-18 18:00:09,498 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:00:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:00:09,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1959426700, now seen corresponding path program 10 times [2022-01-18 18:00:09,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:00:09,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480168012] [2022-01-18 18:00:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:00:09,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:00:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:00:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:09,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:00:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480168012] [2022-01-18 18:00:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480168012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:00:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295261214] [2022-01-18 18:00:09,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 18:00:09,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:00:09,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:00:09,561 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 18:00:10,194 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 18:00:10,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 18:00:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:00:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:00:10,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:00:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:10,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:00:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:10,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295261214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:00:10,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:00:10,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-01-18 18:00:10,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288554250] [2022-01-18 18:00:10,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:00:10,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 18:00:10,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:00:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 18:00:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-18 18:00:10,852 INFO L87 Difference]: Start difference. First operand 282995 states and 1302780 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:00:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:00:15,463 INFO L93 Difference]: Finished difference Result 307552 states and 1402679 transitions. [2022-01-18 18:00:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 18:00:15,464 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:00:15,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:00:19,391 INFO L225 Difference]: With dead ends: 307552 [2022-01-18 18:00:19,392 INFO L226 Difference]: Without dead ends: 307360 [2022-01-18 18:00:19,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=441, Invalid=965, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 18:00:19,392 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 386 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 18:00:19,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 164 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 18:00:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307360 states. [2022-01-18 18:00:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307360 to 282987. [2022-01-18 18:00:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282987 states, 282986 states have (on average 4.603923869025323) internal successors, (1302846), 282986 states have internal predecessors, (1302846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:00:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282987 states to 282987 states and 1302846 transitions. [2022-01-18 18:00:32,249 INFO L78 Accepts]: Start accepts. Automaton has 282987 states and 1302846 transitions. Word has length 25 [2022-01-18 18:00:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:00:32,249 INFO L470 AbstractCegarLoop]: Abstraction has 282987 states and 1302846 transitions. [2022-01-18 18:00:32,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:00:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 282987 states and 1302846 transitions. [2022-01-18 18:00:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:00:32,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:00:32,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:00:33,014 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 18:00:33,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:00:33,199 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:00:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:00:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash 97696024, now seen corresponding path program 11 times [2022-01-18 18:00:33,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:00:33,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620452110] [2022-01-18 18:00:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:00:33,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:00:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:00:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:33,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:00:33,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620452110] [2022-01-18 18:00:33,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620452110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:00:33,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790906868] [2022-01-18 18:00:33,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 18:00:33,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:00:33,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:00:33,268 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 18:00:33,269 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 18:00:33,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:00:33,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:00:33,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:00:33,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:00:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:33,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:00:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790906868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:00:33,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:00:33,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-01-18 18:00:33,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216099203] [2022-01-18 18:00:33,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:00:33,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 18:00:33,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:00:33,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 18:00:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-01-18 18:00:33,754 INFO L87 Difference]: Start difference. First operand 282987 states and 1302846 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 18:00:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:00:39,286 INFO L93 Difference]: Finished difference Result 333816 states and 1511917 transitions. [2022-01-18 18:00:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 18:00:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 25 [2022-01-18 18:00:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:00:41,424 INFO L225 Difference]: With dead ends: 333816 [2022-01-18 18:00:41,424 INFO L226 Difference]: Without dead ends: 333544 [2022-01-18 18:00:41,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 18:00:41,425 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 497 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 18:00:41,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 213 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 18:00:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333544 states. [2022-01-18 18:00:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333544 to 283854. [2022-01-18 18:00:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283854 states, 283853 states have (on average 4.603365122087841) internal successors, (1306679), 283853 states have internal predecessors, (1306679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:00:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283854 states to 283854 states and 1306679 transitions. [2022-01-18 18:00:54,655 INFO L78 Accepts]: Start accepts. Automaton has 283854 states and 1306679 transitions. Word has length 25 [2022-01-18 18:00:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:00:54,655 INFO L470 AbstractCegarLoop]: Abstraction has 283854 states and 1306679 transitions. [2022-01-18 18:00:54,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 18:00:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 283854 states and 1306679 transitions. [2022-01-18 18:00:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:00:56,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:00:56,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:00:56,214 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 18:00:56,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:00:56,399 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:00:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:00:56,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1394277262, now seen corresponding path program 12 times [2022-01-18 18:00:56,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:00:56,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347126407] [2022-01-18 18:00:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:00:56,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:00:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:00:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:56,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:00:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347126407] [2022-01-18 18:00:56,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347126407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:00:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243338902] [2022-01-18 18:00:56,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 18:00:56,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:00:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:00:56,476 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 18:00:56,476 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 18:00:56,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 18:00:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:00:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:00:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:00:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:56,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:00:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:00:56,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243338902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:00:56,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:00:56,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-01-18 18:00:56,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118565429] [2022-01-18 18:00:56,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:00:56,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 18:00:56,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:00:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 18:00:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-18 18:00:56,988 INFO L87 Difference]: Start difference. First operand 283854 states and 1306679 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 18:01:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:01:01,831 INFO L93 Difference]: Finished difference Result 330131 states and 1496907 transitions. [2022-01-18 18:01:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 18:01:01,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 25 [2022-01-18 18:01:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:01:04,639 INFO L225 Difference]: With dead ends: 330131 [2022-01-18 18:01:04,640 INFO L226 Difference]: Without dead ends: 329792 [2022-01-18 18:01:04,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=1237, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 18:01:04,640 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 304 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 18:01:04,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 295 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 18:01:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329792 states. [2022-01-18 18:01:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329792 to 284082. [2022-01-18 18:01:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284082 states, 284081 states have (on average 4.603352564937465) internal successors, (1307725), 284081 states have internal predecessors, (1307725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284082 states to 284082 states and 1307725 transitions. [2022-01-18 18:01:18,148 INFO L78 Accepts]: Start accepts. Automaton has 284082 states and 1307725 transitions. Word has length 25 [2022-01-18 18:01:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:01:18,149 INFO L470 AbstractCegarLoop]: Abstraction has 284082 states and 1307725 transitions. [2022-01-18 18:01:18,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 18:01:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 284082 states and 1307725 transitions. [2022-01-18 18:01:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:01:18,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:01:18,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:01:18,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 18:01:19,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:01:19,062 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:01:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:01:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1595776552, now seen corresponding path program 4 times [2022-01-18 18:01:19,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:01:19,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425434437] [2022-01-18 18:01:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:01:19,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:01:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:01:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 18:01:19,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:01:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425434437] [2022-01-18 18:01:19,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425434437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 18:01:19,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 18:01:19,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 18:01:19,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774082861] [2022-01-18 18:01:19,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 18:01:19,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 18:01:19,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:01:19,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 18:01:19,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 18:01:19,081 INFO L87 Difference]: Start difference. First operand 284082 states and 1307725 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:01:23,163 INFO L93 Difference]: Finished difference Result 263206 states and 1194939 transitions. [2022-01-18 18:01:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 18:01:23,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:01:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:01:25,464 INFO L225 Difference]: With dead ends: 263206 [2022-01-18 18:01:25,465 INFO L226 Difference]: Without dead ends: 217074 [2022-01-18 18:01:25,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 18:01:25,465 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 18:01:25,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 18:01:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217074 states. [2022-01-18 18:01:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217074 to 137299. [2022-01-18 18:01:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137299 states, 137298 states have (on average 4.831687278765896) internal successors, (663381), 137298 states have internal predecessors, (663381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137299 states to 137299 states and 663381 transitions. [2022-01-18 18:01:32,503 INFO L78 Accepts]: Start accepts. Automaton has 137299 states and 663381 transitions. Word has length 25 [2022-01-18 18:01:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:01:32,503 INFO L470 AbstractCegarLoop]: Abstraction has 137299 states and 663381 transitions. [2022-01-18 18:01:32,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 137299 states and 663381 transitions. [2022-01-18 18:01:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:01:33,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:01:33,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:01:33,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-18 18:01:33,526 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:01:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:01:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -910855802, now seen corresponding path program 5 times [2022-01-18 18:01:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:01:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229891001] [2022-01-18 18:01:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:01:33,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:01:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:01:33,567 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 18:01:33,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:01:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229891001] [2022-01-18 18:01:33,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229891001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:01:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664623223] [2022-01-18 18:01:33,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 18:01:33,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:01:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:01:33,569 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 18:01:33,570 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 18:01:33,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 18:01:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:01:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 18:01:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:01:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 18:01:33,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 18:01:33,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664623223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 18:01:33,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 18:01:33,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-01-18 18:01:33,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107564820] [2022-01-18 18:01:33,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 18:01:33,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 18:01:33,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:01:33,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 18:01:33,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-18 18:01:33,646 INFO L87 Difference]: Start difference. First operand 137299 states and 663381 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:01:35,177 INFO L93 Difference]: Finished difference Result 141855 states and 679110 transitions. [2022-01-18 18:01:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 18:01:35,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:01:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:01:36,004 INFO L225 Difference]: With dead ends: 141855 [2022-01-18 18:01:36,005 INFO L226 Difference]: Without dead ends: 139818 [2022-01-18 18:01:36,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-18 18:01:36,005 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 18:01:36,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 57 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 18:01:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139818 states. [2022-01-18 18:01:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139818 to 96081. [2022-01-18 18:01:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96081 states, 96080 states have (on average 4.798438800999167) internal successors, (461034), 96080 states have internal predecessors, (461034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96081 states to 96081 states and 461034 transitions. [2022-01-18 18:01:39,570 INFO L78 Accepts]: Start accepts. Automaton has 96081 states and 461034 transitions. Word has length 25 [2022-01-18 18:01:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:01:39,570 INFO L470 AbstractCegarLoop]: Abstraction has 96081 states and 461034 transitions. [2022-01-18 18:01:39,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 96081 states and 461034 transitions. [2022-01-18 18:01:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:01:39,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:01:39,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:01:39,797 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 18:01:39,981 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 18:01:39,982 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:01:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:01:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2121620054, now seen corresponding path program 6 times [2022-01-18 18:01:39,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:01:39,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195134846] [2022-01-18 18:01:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:01:39,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:01:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:01:40,010 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 18:01:40,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:01:40,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195134846] [2022-01-18 18:01:40,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195134846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:01:40,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179931075] [2022-01-18 18:01:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 18:01:40,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:01:40,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:01:40,012 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 18:01:40,019 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 18:01:40,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 18:01:40,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:01:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 18:01:40,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:01:40,743 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 18:01:40,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:01:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 18:01:40,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179931075] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 18:01:40,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 18:01:40,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-01-18 18:01:40,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130756902] [2022-01-18 18:01:40,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 18:01:40,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 18:01:40,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:01:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 18:01:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 18:01:40,820 INFO L87 Difference]: Start difference. First operand 96081 states and 461034 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:01:41,650 INFO L93 Difference]: Finished difference Result 109619 states and 523012 transitions. [2022-01-18 18:01:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 18:01:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:01:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:01:42,171 INFO L225 Difference]: With dead ends: 109619 [2022-01-18 18:01:42,171 INFO L226 Difference]: Without dead ends: 109570 [2022-01-18 18:01:42,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 18:01:42,171 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 18:01:42,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 35 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 18:01:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109570 states. [2022-01-18 18:01:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109570 to 96038. [2022-01-18 18:01:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96038 states, 96037 states have (on average 4.799202390745234) internal successors, (460901), 96037 states have internal predecessors, (460901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96038 states to 96038 states and 460901 transitions. [2022-01-18 18:01:45,959 INFO L78 Accepts]: Start accepts. Automaton has 96038 states and 460901 transitions. Word has length 25 [2022-01-18 18:01:45,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:01:45,959 INFO L470 AbstractCegarLoop]: Abstraction has 96038 states and 460901 transitions. [2022-01-18 18:01:45,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 96038 states and 460901 transitions. [2022-01-18 18:01:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:01:46,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:01:46,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:01:46,215 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 18:01:46,400 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 18:01:46,400 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:01:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:01:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash -744744372, now seen corresponding path program 7 times [2022-01-18 18:01:46,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:01:46,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331881698] [2022-01-18 18:01:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:01:46,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:01:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:01:46,460 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 18:01:46,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:01:46,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331881698] [2022-01-18 18:01:46,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331881698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:01:46,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322088415] [2022-01-18 18:01:46,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 18:01:46,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:01:46,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:01:46,472 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 18:01:46,472 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 18:01:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:01:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 18:01:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:01:46,574 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 18:01:46,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:01:46,672 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 18:01:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322088415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:01:46,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:01:46,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-01-18 18:01:46,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317692280] [2022-01-18 18:01:46,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:01:46,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 18:01:46,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:01:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 18:01:46,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-18 18:01:46,673 INFO L87 Difference]: Start difference. First operand 96038 states and 460901 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:01:48,396 INFO L93 Difference]: Finished difference Result 110922 states and 525343 transitions. [2022-01-18 18:01:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 18:01:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:01:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:01:48,971 INFO L225 Difference]: With dead ends: 110922 [2022-01-18 18:01:48,971 INFO L226 Difference]: Without dead ends: 110790 [2022-01-18 18:01:48,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2022-01-18 18:01:48,971 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 199 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:01:48,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 111 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:01:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110790 states. [2022-01-18 18:01:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110790 to 96112. [2022-01-18 18:01:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96112 states, 96111 states have (on average 4.798514217935512) internal successors, (461190), 96111 states have internal predecessors, (461190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96112 states to 96112 states and 461190 transitions. [2022-01-18 18:01:52,231 INFO L78 Accepts]: Start accepts. Automaton has 96112 states and 461190 transitions. Word has length 25 [2022-01-18 18:01:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:01:52,231 INFO L470 AbstractCegarLoop]: Abstraction has 96112 states and 461190 transitions. [2022-01-18 18:01:52,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:01:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 96112 states and 461190 transitions. [2022-01-18 18:01:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:01:52,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:01:52,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:01:52,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 18:01:52,646 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 18:01:52,646 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:01:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:01:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 952110506, now seen corresponding path program 8 times [2022-01-18 18:01:52,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:01:52,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393953917] [2022-01-18 18:01:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:01:52,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:01:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:01:52,678 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 18:01:52,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:01:52,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393953917] [2022-01-18 18:01:52,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393953917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:01:52,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169796701] [2022-01-18 18:01:52,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 18:01:52,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:01:52,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:01:52,680 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 18:01:52,680 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 18:01:52,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:01:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:01:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 18:01:52,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:01:52,771 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 18:01:52,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:01:52,886 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 18:01:52,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169796701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:01:52,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:01:52,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 18:01:52,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449014003] [2022-01-18 18:01:52,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:01:52,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 18:01:52,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:01:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 18:01:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:01:52,887 INFO L87 Difference]: Start difference. First operand 96112 states and 461190 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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 18:01:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:01:54,713 INFO L93 Difference]: Finished difference Result 150132 states and 711760 transitions. [2022-01-18 18:01:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 18:01:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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 25 [2022-01-18 18:01:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:01:56,178 INFO L225 Difference]: With dead ends: 150132 [2022-01-18 18:01:56,178 INFO L226 Difference]: Without dead ends: 150032 [2022-01-18 18:01:56,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-01-18 18:01:56,179 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 213 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:01:56,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 111 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:01:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150032 states. [2022-01-18 18:01:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150032 to 115066. [2022-01-18 18:01:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115066 states, 115065 states have (on average 4.79491591709034) internal successors, (551727), 115065 states have internal predecessors, (551727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115066 states to 115066 states and 551727 transitions. [2022-01-18 18:02:00,886 INFO L78 Accepts]: Start accepts. Automaton has 115066 states and 551727 transitions. Word has length 25 [2022-01-18 18:02:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:00,886 INFO L470 AbstractCegarLoop]: Abstraction has 115066 states and 551727 transitions. [2022-01-18 18:02:00,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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 18:02:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 115066 states and 551727 transitions. [2022-01-18 18:02:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:01,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:01,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:01,197 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 18:02:01,382 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 18:02:01,382 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1268665980, now seen corresponding path program 9 times [2022-01-18 18:02:01,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:01,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960868158] [2022-01-18 18:02:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:01,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:01,414 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 18:02:01,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:01,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960868158] [2022-01-18 18:02:01,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960868158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935260393] [2022-01-18 18:02:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 18:02:01,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:01,418 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 18:02:01,435 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 18:02:01,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 18:02:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:02:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 18:02:01,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:01,522 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 18:02:01,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:01,643 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 18:02:01,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935260393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:01,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:01,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-01-18 18:02:01,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393959573] [2022-01-18 18:02:01,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:01,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 18:02:01,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:01,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 18:02:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-01-18 18:02:01,644 INFO L87 Difference]: Start difference. First operand 115066 states and 551727 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 18:02:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:03,389 INFO L93 Difference]: Finished difference Result 133379 states and 633643 transitions. [2022-01-18 18:02:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 18:02:03,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 25 [2022-01-18 18:02:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:04,055 INFO L225 Difference]: With dead ends: 133379 [2022-01-18 18:02:04,055 INFO L226 Difference]: Without dead ends: 133067 [2022-01-18 18:02:04,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2022-01-18 18:02:04,056 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 235 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:04,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 115 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:02:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133067 states. [2022-01-18 18:02:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133067 to 119994. [2022-01-18 18:02:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119994 states, 119993 states have (on average 4.791654513179935) internal successors, (574965), 119993 states have internal predecessors, (574965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119994 states to 119994 states and 574965 transitions. [2022-01-18 18:02:08,348 INFO L78 Accepts]: Start accepts. Automaton has 119994 states and 574965 transitions. Word has length 25 [2022-01-18 18:02:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:08,348 INFO L470 AbstractCegarLoop]: Abstraction has 119994 states and 574965 transitions. [2022-01-18 18:02:08,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 18:02:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 119994 states and 574965 transitions. [2022-01-18 18:02:08,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:08,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:08,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:08,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 18:02:08,827 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 18:02:08,827 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1827208640, now seen corresponding path program 10 times [2022-01-18 18:02:08,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:08,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406075378] [2022-01-18 18:02:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:08,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:08,852 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 18:02:08,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406075378] [2022-01-18 18:02:08,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406075378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046158754] [2022-01-18 18:02:08,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 18:02:08,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:08,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:08,853 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 18:02:08,853 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 18:02:08,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 18:02:08,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:02:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 18:02:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:08,957 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 18:02:08,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:09,045 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 18:02:09,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046158754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:09,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:09,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-01-18 18:02:09,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822127289] [2022-01-18 18:02:09,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:09,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 18:02:09,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 18:02:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:02:09,047 INFO L87 Difference]: Start difference. First operand 119994 states and 574965 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 18:02:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:10,849 INFO L93 Difference]: Finished difference Result 139563 states and 657663 transitions. [2022-01-18 18:02:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 18:02:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 25 [2022-01-18 18:02:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:11,555 INFO L225 Difference]: With dead ends: 139563 [2022-01-18 18:02:11,556 INFO L226 Difference]: Without dead ends: 138630 [2022-01-18 18:02:11,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-01-18 18:02:11,556 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 286 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:11,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 229 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:02:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138630 states. [2022-01-18 18:02:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138630 to 119847. [2022-01-18 18:02:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119847 states, 119846 states have (on average 4.790889975468518) internal successors, (574169), 119846 states have internal predecessors, (574169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119847 states to 119847 states and 574169 transitions. [2022-01-18 18:02:16,383 INFO L78 Accepts]: Start accepts. Automaton has 119847 states and 574169 transitions. Word has length 25 [2022-01-18 18:02:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:16,383 INFO L470 AbstractCegarLoop]: Abstraction has 119847 states and 574169 transitions. [2022-01-18 18:02:16,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 18:02:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 119847 states and 574169 transitions. [2022-01-18 18:02:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:16,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:16,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:16,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 18:02:17,003 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 18:02:17,004 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash -27153446, now seen corresponding path program 11 times [2022-01-18 18:02:17,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:17,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803927530] [2022-01-18 18:02:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:17,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:17,044 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 18:02:17,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:17,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803927530] [2022-01-18 18:02:17,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803927530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:17,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312574295] [2022-01-18 18:02:17,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 18:02:17,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:17,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:17,045 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 18:02:17,047 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 18:02:17,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 18:02:17,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:02:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 18:02:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:17,165 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 18:02:17,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:17,295 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 18:02:17,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312574295] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:17,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:17,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-18 18:02:17,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584833792] [2022-01-18 18:02:17,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:17,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 18:02:17,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 18:02:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-18 18:02:17,296 INFO L87 Difference]: Start difference. First operand 119847 states and 574169 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 18:02:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:19,679 INFO L93 Difference]: Finished difference Result 170289 states and 806851 transitions. [2022-01-18 18:02:19,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 18:02:19,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 25 [2022-01-18 18:02:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:21,453 INFO L225 Difference]: With dead ends: 170289 [2022-01-18 18:02:21,454 INFO L226 Difference]: Without dead ends: 170189 [2022-01-18 18:02:21,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2022-01-18 18:02:21,455 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 163 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:21,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 123 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:02:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170189 states. [2022-01-18 18:02:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170189 to 122609. [2022-01-18 18:02:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122609 states, 122608 states have (on average 4.79268073861412) internal successors, (587621), 122608 states have internal predecessors, (587621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122609 states to 122609 states and 587621 transitions. [2022-01-18 18:02:25,972 INFO L78 Accepts]: Start accepts. Automaton has 122609 states and 587621 transitions. Word has length 25 [2022-01-18 18:02:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:25,972 INFO L470 AbstractCegarLoop]: Abstraction has 122609 states and 587621 transitions. [2022-01-18 18:02:25,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 18:02:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 122609 states and 587621 transitions. [2022-01-18 18:02:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:26,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:26,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:26,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 18:02:26,440 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 18:02:26,440 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash -717988860, now seen corresponding path program 5 times [2022-01-18 18:02:26,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:26,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667259050] [2022-01-18 18:02:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:26,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:26,512 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 18:02:26,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:26,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667259050] [2022-01-18 18:02:26,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667259050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:26,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037786016] [2022-01-18 18:02:26,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 18:02:26,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:26,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:26,514 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 18:02:26,514 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 18:02:26,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:02:26,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:02:26,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 18:02:26,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:26,608 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 18:02:26,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:26,712 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 18:02:26,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037786016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:26,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:26,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 18:02:26,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748322449] [2022-01-18 18:02:26,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:26,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 18:02:26,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 18:02:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 18:02:26,712 INFO L87 Difference]: Start difference. First operand 122609 states and 587621 transitions. Second operand has 10 states, 10 states have (on average 3.1) 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 18:02:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:28,360 INFO L93 Difference]: Finished difference Result 125176 states and 597777 transitions. [2022-01-18 18:02:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 18:02:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) 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 25 [2022-01-18 18:02:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:29,450 INFO L225 Difference]: With dead ends: 125176 [2022-01-18 18:02:29,450 INFO L226 Difference]: Without dead ends: 125070 [2022-01-18 18:02:29,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:02:29,450 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 85 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:29,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 281 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:02:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125070 states. [2022-01-18 18:02:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125070 to 122755. [2022-01-18 18:02:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122755 states, 122754 states have (on average 4.7933346367531815) internal successors, (588401), 122754 states have internal predecessors, (588401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122755 states to 122755 states and 588401 transitions. [2022-01-18 18:02:33,039 INFO L78 Accepts]: Start accepts. Automaton has 122755 states and 588401 transitions. Word has length 25 [2022-01-18 18:02:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:33,039 INFO L470 AbstractCegarLoop]: Abstraction has 122755 states and 588401 transitions. [2022-01-18 18:02:33,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) 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 18:02:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 122755 states and 588401 transitions. [2022-01-18 18:02:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:34,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:34,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:34,080 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 18:02:34,267 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 18:02:34,267 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1407949608, now seen corresponding path program 6 times [2022-01-18 18:02:34,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:34,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411511303] [2022-01-18 18:02:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:34,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:34,345 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 18:02:34,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411511303] [2022-01-18 18:02:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411511303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574693101] [2022-01-18 18:02:34,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 18:02:34,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:34,347 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 18:02:34,348 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 18:02:34,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 18:02:34,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:02:34,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 18:02:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:34,469 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 18:02:34,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:34,636 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 18:02:34,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574693101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:34,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:34,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 18:02:34,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147216622] [2022-01-18 18:02:34,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:34,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 18:02:34,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 18:02:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 18:02:34,637 INFO L87 Difference]: Start difference. First operand 122755 states and 588401 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 18:02:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:36,414 INFO L93 Difference]: Finished difference Result 124245 states and 594073 transitions. [2022-01-18 18:02:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 18:02:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 25 [2022-01-18 18:02:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:37,079 INFO L225 Difference]: With dead ends: 124245 [2022-01-18 18:02:37,079 INFO L226 Difference]: Without dead ends: 124057 [2022-01-18 18:02:37,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 18:02:37,079 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 73 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:37,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 244 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 18:02:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124057 states. [2022-01-18 18:02:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124057 to 122809. [2022-01-18 18:02:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122809 states, 122808 states have (on average 4.793441795322781) internal successors, (588673), 122808 states have internal predecessors, (588673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122809 states to 122809 states and 588673 transitions. [2022-01-18 18:02:41,289 INFO L78 Accepts]: Start accepts. Automaton has 122809 states and 588673 transitions. Word has length 25 [2022-01-18 18:02:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:41,289 INFO L470 AbstractCegarLoop]: Abstraction has 122809 states and 588673 transitions. [2022-01-18 18:02:41,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 18:02:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 122809 states and 588673 transitions. [2022-01-18 18:02:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:41,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:41,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:41,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 18:02:41,831 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 18:02:41,831 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -338310452, now seen corresponding path program 7 times [2022-01-18 18:02:41,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429535313] [2022-01-18 18:02:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:41,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:41,891 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 18:02:41,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429535313] [2022-01-18 18:02:41,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429535313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021042652] [2022-01-18 18:02:41,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 18:02:41,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:41,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:41,893 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 18:02:41,917 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 18:02:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 18:02:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:42,005 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 18:02:42,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:42,093 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 18:02:42,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021042652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:42,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:42,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 18:02:42,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15388581] [2022-01-18 18:02:42,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:42,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 18:02:42,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:42,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 18:02:42,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 18:02:42,094 INFO L87 Difference]: Start difference. First operand 122809 states and 588673 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:43,813 INFO L93 Difference]: Finished difference Result 125488 states and 599208 transitions. [2022-01-18 18:02:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 18:02:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:02:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:44,477 INFO L225 Difference]: With dead ends: 125488 [2022-01-18 18:02:44,477 INFO L226 Difference]: Without dead ends: 125382 [2022-01-18 18:02:44,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-18 18:02:44,477 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 98 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:44,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 413 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:02:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125382 states. [2022-01-18 18:02:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125382 to 122894. [2022-01-18 18:02:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122894 states, 122893 states have (on average 4.79442279055764) internal successors, (589201), 122893 states have internal predecessors, (589201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122894 states to 122894 states and 589201 transitions. [2022-01-18 18:02:48,774 INFO L78 Accepts]: Start accepts. Automaton has 122894 states and 589201 transitions. Word has length 25 [2022-01-18 18:02:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 122894 states and 589201 transitions. [2022-01-18 18:02:48,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 122894 states and 589201 transitions. [2022-01-18 18:02:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:49,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:49,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:49,093 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 18:02:49,278 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 18:02:49,278 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:49,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:49,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1787628016, now seen corresponding path program 8 times [2022-01-18 18:02:49,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:49,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991352731] [2022-01-18 18:02:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:49,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:49,349 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 18:02:49,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991352731] [2022-01-18 18:02:49,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991352731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022869764] [2022-01-18 18:02:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 18:02:49,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:49,350 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 18:02:49,351 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 18:02:49,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:02:49,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:02:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 18:02:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:49,434 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 18:02:49,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:49,563 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 18:02:49,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022869764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:49,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:49,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 18:02:49,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5787483] [2022-01-18 18:02:49,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:49,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 18:02:49,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 18:02:49,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 18:02:49,564 INFO L87 Difference]: Start difference. First operand 122894 states and 589201 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:51,321 INFO L93 Difference]: Finished difference Result 124864 states and 596712 transitions. [2022-01-18 18:02:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 18:02:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:02:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:51,958 INFO L225 Difference]: With dead ends: 124864 [2022-01-18 18:02:51,958 INFO L226 Difference]: Without dead ends: 124676 [2022-01-18 18:02:51,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:02:51,958 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 102 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:51,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 314 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:02:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124676 states. [2022-01-18 18:02:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124676 to 122956. [2022-01-18 18:02:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122956 states, 122955 states have (on average 4.795055101459884) internal successors, (589576), 122955 states have internal predecessors, (589576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122956 states to 122956 states and 589576 transitions. [2022-01-18 18:02:56,096 INFO L78 Accepts]: Start accepts. Automaton has 122956 states and 589576 transitions. Word has length 25 [2022-01-18 18:02:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:02:56,096 INFO L470 AbstractCegarLoop]: Abstraction has 122956 states and 589576 transitions. [2022-01-18 18:02:56,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 122956 states and 589576 transitions. [2022-01-18 18:02:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:02:56,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:02:56,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:02:56,382 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 18:02:56,571 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 18:02:56,571 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:02:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:02:56,571 INFO L85 PathProgramCache]: Analyzing trace with hash 234856072, now seen corresponding path program 9 times [2022-01-18 18:02:56,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:02:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190664877] [2022-01-18 18:02:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:02:56,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:02:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:02:56,644 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 18:02:56,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:02:56,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190664877] [2022-01-18 18:02:56,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190664877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:02:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893647094] [2022-01-18 18:02:56,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 18:02:56,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:02:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:02:56,646 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 18:02:56,647 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 18:02:56,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 18:02:56,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:02:56,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 18:02:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:02:56,735 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 18:02:56,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:02:56,856 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 18:02:56,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893647094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:02:56,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:02:56,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 18:02:56,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455663792] [2022-01-18 18:02:56,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:02:56,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 18:02:56,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:02:56,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 18:02:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 18:02:56,857 INFO L87 Difference]: Start difference. First operand 122956 states and 589576 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:02:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:02:58,565 INFO L93 Difference]: Finished difference Result 124622 states and 595923 transitions. [2022-01-18 18:02:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 18:02:58,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 18:02:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:02:59,560 INFO L225 Difference]: With dead ends: 124622 [2022-01-18 18:02:59,560 INFO L226 Difference]: Without dead ends: 124434 [2022-01-18 18:02:59,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:02:59,561 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 18:02:59,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 415 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 18:02:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124434 states. [2022-01-18 18:03:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124434 to 123015. [2022-01-18 18:03:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123015 states, 123014 states have (on average 4.795689921472353) internal successors, (589937), 123014 states have internal predecessors, (589937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123015 states to 123015 states and 589937 transitions. [2022-01-18 18:03:03,282 INFO L78 Accepts]: Start accepts. Automaton has 123015 states and 589937 transitions. Word has length 25 [2022-01-18 18:03:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:03:03,282 INFO L470 AbstractCegarLoop]: Abstraction has 123015 states and 589937 transitions. [2022-01-18 18:03:03,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 123015 states and 589937 transitions. [2022-01-18 18:03:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:03:04,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:03:04,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:03:04,263 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 18:03:04,421 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 18:03:04,421 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:03:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:03:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1650793316, now seen corresponding path program 10 times [2022-01-18 18:03:04,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:03:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807305495] [2022-01-18 18:03:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:04,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:03:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:04,488 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 18:03:04,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:03:04,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807305495] [2022-01-18 18:03:04,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807305495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:03:04,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301701212] [2022-01-18 18:03:04,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 18:03:04,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:03:04,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:03:04,490 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 18:03:04,491 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 18:03:04,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 18:03:04,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:03:04,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 18:03:04,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:03:04,615 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 18:03:04,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:03:04,749 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 18:03:04,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301701212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:03:04,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:03:04,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 18:03:04,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159079978] [2022-01-18 18:03:04,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:03:04,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 18:03:04,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:03:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 18:03:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 18:03:04,751 INFO L87 Difference]: Start difference. First operand 123015 states and 589937 transitions. Second operand has 10 states, 10 states have (on average 3.1) 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 18:03:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:03:05,867 INFO L93 Difference]: Finished difference Result 125297 states and 598920 transitions. [2022-01-18 18:03:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 18:03:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) 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 25 [2022-01-18 18:03:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:03:07,043 INFO L225 Difference]: With dead ends: 125297 [2022-01-18 18:03:07,043 INFO L226 Difference]: Without dead ends: 125191 [2022-01-18 18:03:07,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-18 18:03:07,044 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 93 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 18:03:07,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 325 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 18:03:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125191 states. [2022-01-18 18:03:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125191 to 123082. [2022-01-18 18:03:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123082 states, 123081 states have (on average 4.79636174551718) internal successors, (590341), 123081 states have internal predecessors, (590341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123082 states to 123082 states and 590341 transitions. [2022-01-18 18:03:11,588 INFO L78 Accepts]: Start accepts. Automaton has 123082 states and 590341 transitions. Word has length 25 [2022-01-18 18:03:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:03:11,589 INFO L470 AbstractCegarLoop]: Abstraction has 123082 states and 590341 transitions. [2022-01-18 18:03:11,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) 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 18:03:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 123082 states and 590341 transitions. [2022-01-18 18:03:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 18:03:12,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:03:12,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:03:12,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 18:03:12,201 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 18:03:12,202 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:03:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:03:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash 475145152, now seen corresponding path program 11 times [2022-01-18 18:03:12,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:03:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069786811] [2022-01-18 18:03:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:12,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:03:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:12,277 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 18:03:12,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:03:12,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069786811] [2022-01-18 18:03:12,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069786811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:03:12,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213906499] [2022-01-18 18:03:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 18:03:12,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:03:12,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:03:12,278 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 18:03:12,279 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 18:03:12,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 18:03:12,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:03:12,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 18:03:12,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:03:12,407 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 18:03:12,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:03:12,594 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 18:03:12,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213906499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:03:12,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:03:12,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 18:03:12,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952688828] [2022-01-18 18:03:12,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:03:12,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 18:03:12,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:03:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 18:03:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 18:03:12,595 INFO L87 Difference]: Start difference. First operand 123082 states and 590341 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 18:03:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:03:14,529 INFO L93 Difference]: Finished difference Result 124603 states and 596059 transitions. [2022-01-18 18:03:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 18:03:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 25 [2022-01-18 18:03:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:03:15,228 INFO L225 Difference]: With dead ends: 124603 [2022-01-18 18:03:15,228 INFO L226 Difference]: Without dead ends: 124415 [2022-01-18 18:03:15,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:03:15,229 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 82 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 18:03:15,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 247 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 18:03:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124415 states. [2022-01-18 18:03:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124415 to 123111. [2022-01-18 18:03:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123111 states, 123110 states have (on average 4.796612785313947) internal successors, (590511), 123110 states have internal predecessors, (590511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123111 states to 123111 states and 590511 transitions. [2022-01-18 18:03:20,448 INFO L78 Accepts]: Start accepts. Automaton has 123111 states and 590511 transitions. Word has length 25 [2022-01-18 18:03:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:03:20,448 INFO L470 AbstractCegarLoop]: Abstraction has 123111 states and 590511 transitions. [2022-01-18 18:03:20,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 18:03:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 123111 states and 590511 transitions. [2022-01-18 18:03:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:03:20,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:03:20,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:03:20,834 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 18:03:21,019 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 18:03:21,019 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:03:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:03:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1692378052, now seen corresponding path program 8 times [2022-01-18 18:03:21,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:03:21,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629560423] [2022-01-18 18:03:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:21,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:03:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:21,063 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 18:03:21,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:03:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629560423] [2022-01-18 18:03:21,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629560423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:03:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166757198] [2022-01-18 18:03:21,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 18:03:21,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:03:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:03:21,064 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 18:03:21,065 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 18:03:21,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:03:21,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:03:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 18:03:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:03:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:03:21,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:03:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:03:21,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166757198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:03:21,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:03:21,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-01-18 18:03:21,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397991481] [2022-01-18 18:03:21,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:03:21,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 18:03:21,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:03:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 18:03:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-01-18 18:03:21,288 INFO L87 Difference]: Start difference. First operand 123111 states and 590511 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 18:03:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:03:23,637 INFO L93 Difference]: Finished difference Result 165125 states and 777741 transitions. [2022-01-18 18:03:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 18:03:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 27 [2022-01-18 18:03:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:03:25,043 INFO L225 Difference]: With dead ends: 165125 [2022-01-18 18:03:25,043 INFO L226 Difference]: Without dead ends: 163479 [2022-01-18 18:03:25,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2022-01-18 18:03:25,044 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 355 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 18:03:25,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 239 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 18:03:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163479 states. [2022-01-18 18:03:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163479 to 129926. [2022-01-18 18:03:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129926 states, 129925 states have (on average 4.791141042909371) internal successors, (622489), 129925 states have internal predecessors, (622489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129926 states to 129926 states and 622489 transitions. [2022-01-18 18:03:30,284 INFO L78 Accepts]: Start accepts. Automaton has 129926 states and 622489 transitions. Word has length 27 [2022-01-18 18:03:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:03:30,284 INFO L470 AbstractCegarLoop]: Abstraction has 129926 states and 622489 transitions. [2022-01-18 18:03:30,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 18:03:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 129926 states and 622489 transitions. [2022-01-18 18:03:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:03:31,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:03:31,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:03:31,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 18:03:31,541 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 18:03:31,542 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:03:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:03:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1810365244, now seen corresponding path program 6 times [2022-01-18 18:03:31,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:03:31,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369100780] [2022-01-18 18:03:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:31,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:03:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:31,624 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 18:03:31,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:03:31,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369100780] [2022-01-18 18:03:31,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369100780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:03:31,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295567955] [2022-01-18 18:03:31,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 18:03:31,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:03:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:03:31,625 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 18:03:31,626 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 18:03:31,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 18:03:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:03:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:03:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:03:31,740 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 18:03:31,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:03:31,877 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 18:03:31,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295567955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:03:31,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:03:31,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 18:03:31,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928442366] [2022-01-18 18:03:31,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:03:31,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 18:03:31,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:03:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 18:03:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-18 18:03:31,879 INFO L87 Difference]: Start difference. First operand 129926 states and 622489 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:03:33,857 INFO L93 Difference]: Finished difference Result 131972 states and 630349 transitions. [2022-01-18 18:03:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 18:03:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 18:03:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:03:34,558 INFO L225 Difference]: With dead ends: 131972 [2022-01-18 18:03:34,558 INFO L226 Difference]: Without dead ends: 131908 [2022-01-18 18:03:34,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 17 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 18:03:34,558 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 134 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 18:03:34,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 519 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 18:03:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131908 states. [2022-01-18 18:03:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131908 to 130113. [2022-01-18 18:03:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130113 states, 130112 states have (on average 4.790910907525824) internal successors, (623355), 130112 states have internal predecessors, (623355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130113 states to 130113 states and 623355 transitions. [2022-01-18 18:03:39,144 INFO L78 Accepts]: Start accepts. Automaton has 130113 states and 623355 transitions. Word has length 27 [2022-01-18 18:03:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:03:39,144 INFO L470 AbstractCegarLoop]: Abstraction has 130113 states and 623355 transitions. [2022-01-18 18:03:39,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 130113 states and 623355 transitions. [2022-01-18 18:03:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:03:39,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:03:39,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:03:39,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 18:03:39,678 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 18:03:39,679 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:03:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:03:39,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1564888438, now seen corresponding path program 7 times [2022-01-18 18:03:39,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:03:39,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66902673] [2022-01-18 18:03:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:39,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:03:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:03:39,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:03:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66902673] [2022-01-18 18:03:39,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66902673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:03:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015296211] [2022-01-18 18:03:39,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 18:03:39,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:03:39,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:03:39,767 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 18:03:39,768 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 18:03:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:03:39,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:03:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:03:39,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:03:40,071 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 18:03:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015296211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:03:40,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:03:40,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 13 [2022-01-18 18:03:40,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107719751] [2022-01-18 18:03:40,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:03:40,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 18:03:40,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:03:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 18:03:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:03:40,072 INFO L87 Difference]: Start difference. First operand 130113 states and 623355 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:03:42,215 INFO L93 Difference]: Finished difference Result 131254 states and 627340 transitions. [2022-01-18 18:03:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 18:03:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 18:03:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:03:42,869 INFO L225 Difference]: With dead ends: 131254 [2022-01-18 18:03:42,869 INFO L226 Difference]: Without dead ends: 131126 [2022-01-18 18:03:42,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-01-18 18:03:42,869 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 18:03:42,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 324 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 18:03:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131126 states. [2022-01-18 18:03:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131126 to 130140. [2022-01-18 18:03:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130140 states, 130139 states have (on average 4.791038812346798) internal successors, (623501), 130139 states have internal predecessors, (623501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130140 states to 130140 states and 623501 transitions. [2022-01-18 18:03:47,185 INFO L78 Accepts]: Start accepts. Automaton has 130140 states and 623501 transitions. Word has length 27 [2022-01-18 18:03:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:03:47,185 INFO L470 AbstractCegarLoop]: Abstraction has 130140 states and 623501 transitions. [2022-01-18 18:03:47,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 130140 states and 623501 transitions. [2022-01-18 18:03:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:03:48,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:03:48,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:03:48,303 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 18:03:48,487 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 18:03:48,488 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:03:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:03:48,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1076671746, now seen corresponding path program 8 times [2022-01-18 18:03:48,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:03:48,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267008367] [2022-01-18 18:03:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:48,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:03:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:48,571 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 18:03:48,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:03:48,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267008367] [2022-01-18 18:03:48,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267008367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:03:48,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879087620] [2022-01-18 18:03:48,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 18:03:48,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:03:48,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:03:48,572 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 18:03:48,574 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 18:03:48,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:03:48,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:03:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:03:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:03:48,682 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 18:03:48,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:03:48,877 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 18:03:48,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879087620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:03:48,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:03:48,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 13 [2022-01-18 18:03:48,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891429821] [2022-01-18 18:03:48,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:03:48,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 18:03:48,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:03:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 18:03:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:03:48,878 INFO L87 Difference]: Start difference. First operand 130140 states and 623501 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:03:51,121 INFO L93 Difference]: Finished difference Result 131973 states and 630100 transitions. [2022-01-18 18:03:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 18:03:51,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 18:03:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:03:51,795 INFO L225 Difference]: With dead ends: 131973 [2022-01-18 18:03:51,796 INFO L226 Difference]: Without dead ends: 131845 [2022-01-18 18:03:51,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-18 18:03:51,796 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 156 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 18:03:51,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 490 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 18:03:51,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131845 states. [2022-01-18 18:03:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131845 to 130201. [2022-01-18 18:03:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130201 states, 130200 states have (on average 4.791328725038403) internal successors, (623831), 130200 states have internal predecessors, (623831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130201 states to 130201 states and 623831 transitions. [2022-01-18 18:03:56,345 INFO L78 Accepts]: Start accepts. Automaton has 130201 states and 623831 transitions. Word has length 27 [2022-01-18 18:03:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:03:56,345 INFO L470 AbstractCegarLoop]: Abstraction has 130201 states and 623831 transitions. [2022-01-18 18:03:56,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 130201 states and 623831 transitions. [2022-01-18 18:03:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:03:56,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:03:56,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:03:56,675 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 18:03:56,860 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 18:03:56,860 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:03:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:03:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash -829638072, now seen corresponding path program 1 times [2022-01-18 18:03:56,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:03:56,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550481839] [2022-01-18 18:03:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:56,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:03:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:03:56,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:03:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550481839] [2022-01-18 18:03:56,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550481839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:03:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171477541] [2022-01-18 18:03:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:03:56,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:03:56,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:03:56,903 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 18:03:56,928 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 18:03:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:03:56,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 18:03:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:03:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:03:57,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:03:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:03:57,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171477541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:03:57,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:03:57,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 18 [2022-01-18 18:03:57,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299573063] [2022-01-18 18:03:57,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:03:57,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 18:03:57,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:03:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 18:03:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-01-18 18:03:57,219 INFO L87 Difference]: Start difference. First operand 130201 states and 623831 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:03:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:03:59,900 INFO L93 Difference]: Finished difference Result 173395 states and 821303 transitions. [2022-01-18 18:03:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 18:03:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 18:03:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:04:00,926 INFO L225 Difference]: With dead ends: 173395 [2022-01-18 18:04:00,926 INFO L226 Difference]: Without dead ends: 172655 [2022-01-18 18:04:00,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2022-01-18 18:04:00,926 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 18:04:00,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 138 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 18:04:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172655 states. [2022-01-18 18:04:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172655 to 148277. [2022-01-18 18:04:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148277 states, 148276 states have (on average 4.79727670020772) internal successors, (711321), 148276 states have internal predecessors, (711321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:04:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148277 states to 148277 states and 711321 transitions. [2022-01-18 18:04:06,865 INFO L78 Accepts]: Start accepts. Automaton has 148277 states and 711321 transitions. Word has length 27 [2022-01-18 18:04:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:04:06,866 INFO L470 AbstractCegarLoop]: Abstraction has 148277 states and 711321 transitions. [2022-01-18 18:04:06,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:04:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 148277 states and 711321 transitions. [2022-01-18 18:04:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:04:07,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:04:07,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:04:07,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 18:04:07,538 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 18:04:07,538 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:04:07,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:04:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash -378903992, now seen corresponding path program 2 times [2022-01-18 18:04:07,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:04:07,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151331822] [2022-01-18 18:04:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:04:07,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:04:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:04:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:07,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:04:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151331822] [2022-01-18 18:04:07,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151331822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:04:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459690248] [2022-01-18 18:04:07,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 18:04:07,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:04:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:04:07,573 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 18:04:07,579 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 18:04:07,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:04:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:04:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 18:04:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:04:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:07,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:04:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:07,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459690248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:04:07,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:04:07,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 18 [2022-01-18 18:04:07,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742932452] [2022-01-18 18:04:07,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:04:07,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 18:04:07,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:04:07,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 18:04:07,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-01-18 18:04:07,872 INFO L87 Difference]: Start difference. First operand 148277 states and 711321 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 18:04:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:04:10,513 INFO L93 Difference]: Finished difference Result 222114 states and 1043034 transitions. [2022-01-18 18:04:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 18:04:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 27 [2022-01-18 18:04:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:04:12,437 INFO L225 Difference]: With dead ends: 222114 [2022-01-18 18:04:12,437 INFO L226 Difference]: Without dead ends: 220575 [2022-01-18 18:04:12,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=394, Invalid=796, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 18:04:12,438 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 523 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 18:04:12,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 220 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 18:04:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220575 states. [2022-01-18 18:04:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220575 to 173515. [2022-01-18 18:04:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173515 states, 173514 states have (on average 4.802598061251541) internal successors, (833318), 173514 states have internal predecessors, (833318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:04:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173515 states to 173515 states and 833318 transitions. [2022-01-18 18:04:21,188 INFO L78 Accepts]: Start accepts. Automaton has 173515 states and 833318 transitions. Word has length 27 [2022-01-18 18:04:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:04:21,189 INFO L470 AbstractCegarLoop]: Abstraction has 173515 states and 833318 transitions. [2022-01-18 18:04:21,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 18:04:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 173515 states and 833318 transitions. [2022-01-18 18:04:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:04:22,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:04:22,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:04:22,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 18:04:22,542 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 18:04:22,542 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:04:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:04:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1388180732, now seen corresponding path program 3 times [2022-01-18 18:04:22,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:04:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678876975] [2022-01-18 18:04:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:04:22,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:04:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:04:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:22,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:04:22,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678876975] [2022-01-18 18:04:22,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678876975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:04:22,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528366316] [2022-01-18 18:04:22,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 18:04:22,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:04:22,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:04:22,580 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 18:04:22,602 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 18:04:22,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 18:04:22,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:04:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 18:04:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:04:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:22,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:04:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:22,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528366316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:04:22,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:04:22,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 17 [2022-01-18 18:04:22,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824379653] [2022-01-18 18:04:22,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:04:22,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 18:04:22,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:04:22,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 18:04:22,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-01-18 18:04:22,842 INFO L87 Difference]: Start difference. First operand 173515 states and 833318 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 18:04:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:04:25,669 INFO L93 Difference]: Finished difference Result 243116 states and 1148392 transitions. [2022-01-18 18:04:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 18:04:25,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 27 [2022-01-18 18:04:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:04:27,740 INFO L225 Difference]: With dead ends: 243116 [2022-01-18 18:04:27,740 INFO L226 Difference]: Without dead ends: 240081 [2022-01-18 18:04:27,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 18:04:27,741 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 343 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 18:04:27,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 294 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 18:04:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240081 states. [2022-01-18 18:04:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240081 to 190463. [2022-01-18 18:04:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190463 states, 190462 states have (on average 4.793418109649169) internal successors, (912964), 190462 states have internal predecessors, (912964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:04:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190463 states to 190463 states and 912964 transitions. [2022-01-18 18:04:37,008 INFO L78 Accepts]: Start accepts. Automaton has 190463 states and 912964 transitions. Word has length 27 [2022-01-18 18:04:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:04:37,008 INFO L470 AbstractCegarLoop]: Abstraction has 190463 states and 912964 transitions. [2022-01-18 18:04:37,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 18:04:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 190463 states and 912964 transitions. [2022-01-18 18:04:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:04:37,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:04:37,581 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:04:37,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 18:04:37,781 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 18:04:37,781 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:04:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:04:37,781 INFO L85 PathProgramCache]: Analyzing trace with hash 411874462, now seen corresponding path program 9 times [2022-01-18 18:04:37,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:04:37,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774559790] [2022-01-18 18:04:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:04:37,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:04:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:04:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:37,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:04:37,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774559790] [2022-01-18 18:04:37,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774559790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:04:37,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636492497] [2022-01-18 18:04:37,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 18:04:37,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:04:37,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:04:37,832 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 18:04:37,833 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 18:04:37,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 18:04:37,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:04:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 18:04:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:04:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:37,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:04:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:38,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636492497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:04:38,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:04:38,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2022-01-18 18:04:38,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058892260] [2022-01-18 18:04:38,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:04:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 18:04:38,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:04:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 18:04:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-18 18:04:38,128 INFO L87 Difference]: Start difference. First operand 190463 states and 912964 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 18:04:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:04:40,926 INFO L93 Difference]: Finished difference Result 220325 states and 1048932 transitions. [2022-01-18 18:04:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 18:04:40,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 27 [2022-01-18 18:04:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:04:42,938 INFO L225 Difference]: With dead ends: 220325 [2022-01-18 18:04:42,938 INFO L226 Difference]: Without dead ends: 220155 [2022-01-18 18:04:42,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1165, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 18:04:42,939 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 433 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 18:04:42,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 211 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 18:04:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220155 states. [2022-01-18 18:04:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220155 to 191203. [2022-01-18 18:04:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191203 states, 191202 states have (on average 4.79175427035282) internal successors, (916193), 191202 states have internal predecessors, (916193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:04:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191203 states to 191203 states and 916193 transitions. [2022-01-18 18:04:51,544 INFO L78 Accepts]: Start accepts. Automaton has 191203 states and 916193 transitions. Word has length 27 [2022-01-18 18:04:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:04:51,545 INFO L470 AbstractCegarLoop]: Abstraction has 191203 states and 916193 transitions. [2022-01-18 18:04:51,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 18:04:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 191203 states and 916193 transitions. [2022-01-18 18:04:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:04:52,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:04:52,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:04:52,909 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 18:04:53,108 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 18:04:53,109 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:04:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:04:53,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1136534840, now seen corresponding path program 1 times [2022-01-18 18:04:53,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:04:53,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636993611] [2022-01-18 18:04:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:04:53,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:04:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:04:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:53,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:04:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636993611] [2022-01-18 18:04:53,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636993611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:04:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347837168] [2022-01-18 18:04:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:04:53,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:04:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:04:53,192 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 18:04:53,193 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 18:04:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:04:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:04:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:04:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:53,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:04:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:04:53,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347837168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:04:53,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:04:53,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-01-18 18:04:53,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696311154] [2022-01-18 18:04:53,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:04:53,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 18:04:53,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:04:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 18:04:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 18:04:53,435 INFO L87 Difference]: Start difference. First operand 191203 states and 916193 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:04:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:04:55,837 INFO L93 Difference]: Finished difference Result 193678 states and 925448 transitions. [2022-01-18 18:04:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 18:04:55,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 18:04:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:04:57,081 INFO L225 Difference]: With dead ends: 193678 [2022-01-18 18:04:57,081 INFO L226 Difference]: Without dead ends: 193560 [2022-01-18 18:04:57,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-18 18:04:57,081 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 153 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 18:04:57,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 693 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 18:04:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193560 states. [2022-01-18 18:05:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193560 to 191246. [2022-01-18 18:05:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191246 states, 191245 states have (on average 4.791994561949332) internal successors, (916445), 191245 states have internal predecessors, (916445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:05:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191246 states to 191246 states and 916445 transitions. [2022-01-18 18:05:05,340 INFO L78 Accepts]: Start accepts. Automaton has 191246 states and 916445 transitions. Word has length 27 [2022-01-18 18:05:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 18:05:05,340 INFO L470 AbstractCegarLoop]: Abstraction has 191246 states and 916445 transitions. [2022-01-18 18:05:05,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:05:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 191246 states and 916445 transitions. [2022-01-18 18:05:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 18:05:05,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 18:05:05,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 18:05:05,956 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 18:05:06,140 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 18:05:06,140 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 18:05:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 18:05:06,141 INFO L85 PathProgramCache]: Analyzing trace with hash -308962172, now seen corresponding path program 2 times [2022-01-18 18:05:06,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 18:05:06,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442833105] [2022-01-18 18:05:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 18:05:06,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 18:05:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 18:05:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:05:06,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 18:05:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442833105] [2022-01-18 18:05:06,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442833105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 18:05:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800621974] [2022-01-18 18:05:06,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 18:05:06,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 18:05:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 18:05:06,245 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 18:05:06,265 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 18:05:06,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 18:05:06,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 18:05:06,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 18:05:06,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 18:05:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:05:06,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 18:05:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 18:05:07,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800621974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 18:05:07,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 18:05:07,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 18:05:07,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582278803] [2022-01-18 18:05:07,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 18:05:07,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 18:05:07,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 18:05:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 18:05:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 18:05:07,287 INFO L87 Difference]: Start difference. First operand 191246 states and 916445 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 18:05:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 18:05:09,710 INFO L93 Difference]: Finished difference Result 194822 states and 930212 transitions. [2022-01-18 18:05:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 18:05:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 18:05:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 18:05:10,937 INFO L225 Difference]: With dead ends: 194822 [2022-01-18 18:05:10,937 INFO L226 Difference]: Without dead ends: 194658 [2022-01-18 18:05:10,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 18:05:10,938 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 112 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 18:05:10,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 466 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 18:05:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194658 states. Received shutdown request... [2022-01-18 18:05:11,852 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-01-18 18:05:11,875 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 18:05:11,876 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 18:05:11,876 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 18:05:12,075 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 18:05:12,076 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-18 18:05:12,077 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-01-18 18:05:12,077 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-01-18 18:05:12,077 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-01-18 18:05:12,077 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-01-18 18:05:12,080 INFO L732 BasicCegarLoop]: Path program histogram: [16, 12, 11, 11, 9, 8, 3, 2, 2, 1, 1, 1] [2022-01-18 18:05:12,082 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 18:05:12,082 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 18:05:12,083 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:05:12 BasicIcfg [2022-01-18 18:05:12,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 18:05:12,084 INFO L158 Benchmark]: Toolchain (without parser) took 616334.87ms. Allocated memory was 362.8MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 323.8MB in the beginning and 8.8GB in the end (delta: -8.5GB). Peak memory consumption was 7.8GB. Max. memory is 16.0GB. [2022-01-18 18:05:12,084 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 362.8MB. Free memory is still 324.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 18:05:12,084 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.32ms. Allocated memory is still 362.8MB. Free memory was 323.7MB in the beginning and 322.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 18:05:12,084 INFO L158 Benchmark]: Boogie Preprocessor took 24.76ms. Allocated memory is still 362.8MB. Free memory was 322.2MB in the beginning and 321.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 18:05:12,084 INFO L158 Benchmark]: RCFGBuilder took 201.43ms. Allocated memory is still 362.8MB. Free memory was 321.2MB in the beginning and 311.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 18:05:12,084 INFO L158 Benchmark]: TraceAbstraction took 616072.08ms. Allocated memory was 362.8MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 310.9MB in the beginning and 8.8GB in the end (delta: -8.5GB). Peak memory consumption was 7.8GB. Max. memory is 16.0GB. [2022-01-18 18:05:12,085 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 0.14ms. Allocated memory is still 362.8MB. Free memory is still 324.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.32ms. Allocated memory is still 362.8MB. Free memory was 323.7MB in the beginning and 322.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 24.76ms. Allocated memory is still 362.8MB. Free memory was 322.2MB in the beginning and 321.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 201.43ms. Allocated memory is still 362.8MB. Free memory was 321.2MB in the beginning and 311.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 616072.08ms. Allocated memory was 362.8MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 310.9MB in the beginning and 8.8GB in the end (delta: -8.5GB). Peak memory consumption was 7.8GB. 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: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 616.0s, OverallIterations: 77, TraceHistogramMax: 3, PathProgramHistogramMax: 16, EmptinessCheckTime: 26.5s, AutomataDifference: 219.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18772 SdHoareTripleChecker+Valid, 23.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18772 mSDsluCounter, 15843 SdHoareTripleChecker+Invalid, 19.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24502 mSDsCounter, 6306 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44742 IncrementalHoareTripleChecker+Invalid, 51048 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6306 mSolverCounterUnsat, 2683 mSDtfsCounter, 44742 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4886 GetRequests, 2703 SyntacticMatches, 351 SemanticMatches, 1832 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20838 ImplicationChecksByTransitivity, 29.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=284082occurred in iteration=52, InterpolantAutomatonStates: 1767, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 325.0s AutomataMinimizationTime, 77 MinimizatonAttempts, 1785593 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 25.9s InterpolantComputationTime, 3685 NumberOfCodeBlocks, 3685 NumberOfCodeBlocksAsserted, 214 NumberOfCheckSat, 5204 ConstructedInterpolants, 0 QuantifiedInterpolants, 37668 SizeOfPredicates, 152 NumberOfNonLiveVariables, 5082 ConjunctsInSsa, 704 ConjunctsInUnsatCore, 219 InterpolantComputations, 13 PerfectInterpolantSequences, 240/835 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