/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:47:29,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:47:29,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:47:29,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 16:47:29,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 16:47:29,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 16:47:29,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 16:47:29,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 16:47:29,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 16:47:29,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 16:47:29,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 16:47:29,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 16:47:29,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 16:47:29,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 16:47:29,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 16:47:29,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 16:47:29,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 16:47:29,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:47:29,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:47:29,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:47:29,723 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 16:47:29,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:47:29,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:47:29,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:47:29,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:47:29,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:47:29,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:47:29,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:47:29,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:47:29,750 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:47:29,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:47:29,751 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:47:29,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:47:29,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:47:29,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:47:29,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:47:29,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:47:29,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:47:29,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:47:29,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:47:29,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:47:29,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:47:29,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:47:29,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:47:29,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:47:29,753 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:47:29,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:47:29,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:47:29,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:47:29,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:47:29,955 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:47:29,956 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:47:29,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2022-01-18 16:47:29,957 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2022-01-18 16:47:29,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:47:29,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:47:29,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:47:29,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:47:29,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:47:29,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:29,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:29,992 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:47:29,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:47:29,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:47:29,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:47:29,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:47:29,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:29,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:29,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:29,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:30,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:30,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:30,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:30,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:47:30,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:47:30,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:47:30,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:47:30,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/1) ... [2022-01-18 16:47:30,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:47:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:30,027 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 16:47:30,035 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 16:47:30,051 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:47:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:47:30,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:47:30,052 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:47:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:47:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:47:30,052 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:47:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:47:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:47:30,053 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 16:47:30,081 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:47:30,082 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:47:30,175 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:47:30,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:47:30,186 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:47:30,187 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:47:30 BoogieIcfgContainer [2022-01-18 16:47:30,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:47:30,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:47:30,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:47:30,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:47:30,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:29" (1/2) ... [2022-01-18 16:47:30,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de4d057 and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:47:30, skipping insertion in model container [2022-01-18 16:47:30,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:47:30" (2/2) ... [2022-01-18 16:47:30,192 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2022-01-18 16:47:30,195 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:47:30,195 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:47:30,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:47:30,195 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:47:30,214 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 16:47:30,240 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:47:30,244 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 16:47:30,244 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 16:47:30,250 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2022-01-18 16:47:30,261 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:47:30,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:30,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:30,268 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1895407217, now seen corresponding path program 1 times [2022-01-18 16:47:30,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:30,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789509633] [2022-01-18 16:47:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:30,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:30,423 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 16:47:30,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789509633] [2022-01-18 16:47:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789509633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:30,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:30,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:47:30,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057522296] [2022-01-18 16:47:30,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:30,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:47:30,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:47:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:47:30,448 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:30,494 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2022-01-18 16:47:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:47:30,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 16:47:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:30,501 INFO L225 Difference]: With dead ends: 38 [2022-01-18 16:47:30,502 INFO L226 Difference]: Without dead ends: 38 [2022-01-18 16:47:30,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:47:30,509 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:30,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-18 16:47:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-18 16:47:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2022-01-18 16:47:30,554 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2022-01-18 16:47:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:30,554 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2022-01-18 16:47:30,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2022-01-18 16:47:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 16:47:30,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:30,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:30,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:47:30,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 161461187, now seen corresponding path program 1 times [2022-01-18 16:47:30,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940775534] [2022-01-18 16:47:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:30,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:30,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940775534] [2022-01-18 16:47:30,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940775534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:30,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:30,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:47:30,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150418302] [2022-01-18 16:47:30,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:30,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:47:30,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:47:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:47:30,604 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:30,636 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2022-01-18 16:47:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:47:30,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 16:47:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:30,639 INFO L225 Difference]: With dead ends: 62 [2022-01-18 16:47:30,639 INFO L226 Difference]: Without dead ends: 62 [2022-01-18 16:47:30,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:47:30,640 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:30,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-18 16:47:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-01-18 16:47:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2022-01-18 16:47:30,647 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2022-01-18 16:47:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:30,647 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2022-01-18 16:47:30,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2022-01-18 16:47:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:47:30,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:30,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:30,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:47:30,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1536775877, now seen corresponding path program 1 times [2022-01-18 16:47:30,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:30,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768894658] [2022-01-18 16:47:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:30,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:47:30,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:30,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768894658] [2022-01-18 16:47:30,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768894658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:30,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:30,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:47:30,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460288801] [2022-01-18 16:47:30,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:30,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:47:30,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:47:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:47:30,727 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:30,746 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2022-01-18 16:47:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:47:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 16:47:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:30,753 INFO L225 Difference]: With dead ends: 87 [2022-01-18 16:47:30,753 INFO L226 Difference]: Without dead ends: 87 [2022-01-18 16:47:30,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:47:30,759 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:30,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-18 16:47:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-01-18 16:47:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2022-01-18 16:47:30,769 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2022-01-18 16:47:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:30,769 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2022-01-18 16:47:30,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2022-01-18 16:47:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:30,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:30,770 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] [2022-01-18 16:47:30,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:47:30,770 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1011707577, now seen corresponding path program 2 times [2022-01-18 16:47:30,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:30,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865008811] [2022-01-18 16:47:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:30,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:31,022 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 16:47:31,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:31,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865008811] [2022-01-18 16:47:31,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865008811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95939496] [2022-01-18 16:47:31,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:47:31,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:31,024 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 16:47:31,025 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 16:47:31,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:47:31,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:47:31,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:31,715 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 16:47:31,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:32,286 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 16:47:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95939496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:32,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:32,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-01-18 16:47:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69322781] [2022-01-18 16:47:32,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:32,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:47:32,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:47:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:47:32,291 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:33,200 INFO L93 Difference]: Finished difference Result 216 states and 395 transitions. [2022-01-18 16:47:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:47:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:47:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:33,201 INFO L225 Difference]: With dead ends: 216 [2022-01-18 16:47:33,201 INFO L226 Difference]: Without dead ends: 167 [2022-01-18 16:47:33,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:47:33,203 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 249 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:33,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 164 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:47:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-18 16:47:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 82. [2022-01-18 16:47:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 159 transitions. [2022-01-18 16:47:33,209 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 159 transitions. Word has length 22 [2022-01-18 16:47:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:33,209 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 159 transitions. [2022-01-18 16:47:33,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 159 transitions. [2022-01-18 16:47:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:33,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:33,210 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] [2022-01-18 16:47:33,228 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 16:47:33,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:33,428 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1602763079, now seen corresponding path program 3 times [2022-01-18 16:47:33,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:33,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713107802] [2022-01-18 16:47:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:33,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:33,587 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 16:47:33,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:33,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713107802] [2022-01-18 16:47:33,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713107802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:33,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658208435] [2022-01-18 16:47:33,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:47:33,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:33,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:33,590 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 16:47:33,591 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 16:47:33,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:47:33,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:47:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:34,008 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 16:47:34,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:34,410 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 16:47:34,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658208435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:34,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:34,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 16:47:34,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693854124] [2022-01-18 16:47:34,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:34,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:47:34,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:47:34,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:47:34,412 INFO L87 Difference]: Start difference. First operand 82 states and 159 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:35,413 INFO L93 Difference]: Finished difference Result 230 states and 427 transitions. [2022-01-18 16:47:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:47:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:47:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:35,417 INFO L225 Difference]: With dead ends: 230 [2022-01-18 16:47:35,417 INFO L226 Difference]: Without dead ends: 216 [2022-01-18 16:47:35,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=599, Invalid=2371, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:47:35,420 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:35,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 152 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:47:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-18 16:47:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2022-01-18 16:47:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-01-18 16:47:35,432 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-01-18 16:47:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:35,432 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-01-18 16:47:35,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-01-18 16:47:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:35,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:35,433 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] [2022-01-18 16:47:35,453 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 16:47:35,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:35,652 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash -995630777, now seen corresponding path program 4 times [2022-01-18 16:47:35,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:35,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984074300] [2022-01-18 16:47:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:35,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:35,824 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 16:47:35,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:35,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984074300] [2022-01-18 16:47:35,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984074300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:35,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643921250] [2022-01-18 16:47:35,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:47:35,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:35,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:35,825 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 16:47:35,826 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 16:47:35,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:47:35,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:35,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:47:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:36,282 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 16:47:36,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:36,681 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 16:47:36,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643921250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:36,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:36,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2022-01-18 16:47:36,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961851657] [2022-01-18 16:47:36,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:36,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:47:36,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:47:36,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:47:36,683 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:37,731 INFO L93 Difference]: Finished difference Result 273 states and 531 transitions. [2022-01-18 16:47:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:47:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:47:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:37,732 INFO L225 Difference]: With dead ends: 273 [2022-01-18 16:47:37,732 INFO L226 Difference]: Without dead ends: 244 [2022-01-18 16:47:37,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=740, Invalid=2920, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:47:37,734 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 245 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:37,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 134 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:47:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-18 16:47:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2022-01-18 16:47:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-01-18 16:47:37,740 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-01-18 16:47:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:37,741 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-01-18 16:47:37,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-01-18 16:47:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:37,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:37,741 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] [2022-01-18 16:47:37,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:37,955 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 16:47:37,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:37,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2016379011, now seen corresponding path program 5 times [2022-01-18 16:47:37,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:37,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827587789] [2022-01-18 16:47:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:37,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:38,094 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 16:47:38,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827587789] [2022-01-18 16:47:38,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827587789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483418808] [2022-01-18 16:47:38,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:47:38,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:38,095 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 16:47:38,096 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 16:47:38,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:47:38,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:38,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:47:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:38,516 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 16:47:38,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:38,975 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 16:47:38,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483418808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:38,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:38,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 16:47:38,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156202334] [2022-01-18 16:47:38,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:38,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:47:38,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:38,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:47:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:47:38,979 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:40,289 INFO L93 Difference]: Finished difference Result 251 states and 474 transitions. [2022-01-18 16:47:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:47:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:47:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:40,290 INFO L225 Difference]: With dead ends: 251 [2022-01-18 16:47:40,290 INFO L226 Difference]: Without dead ends: 237 [2022-01-18 16:47:40,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=771, Invalid=3389, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:47:40,292 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:40,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 178 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:47:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-18 16:47:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 127. [2022-01-18 16:47:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0952380952380953) internal successors, (264), 126 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 264 transitions. [2022-01-18 16:47:40,298 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 264 transitions. Word has length 22 [2022-01-18 16:47:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:40,298 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 264 transitions. [2022-01-18 16:47:40,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 264 transitions. [2022-01-18 16:47:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:40,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:40,299 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] [2022-01-18 16:47:40,315 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 16:47:40,515 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 16:47:40,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash -582014845, now seen corresponding path program 6 times [2022-01-18 16:47:40,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:40,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776095505] [2022-01-18 16:47:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:40,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:40,652 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 16:47:40,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776095505] [2022-01-18 16:47:40,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776095505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385706360] [2022-01-18 16:47:40,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:47:40,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:40,654 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 16:47:40,655 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 16:47:40,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:47:40,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:47:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:41,036 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 16:47:41,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:41,407 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 16:47:41,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385706360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:41,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:41,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2022-01-18 16:47:41,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662388499] [2022-01-18 16:47:41,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:41,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:47:41,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:47:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:47:41,408 INFO L87 Difference]: Start difference. First operand 127 states and 264 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:42,704 INFO L93 Difference]: Finished difference Result 329 states and 643 transitions. [2022-01-18 16:47:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:47:42,704 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:47:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:42,705 INFO L225 Difference]: With dead ends: 329 [2022-01-18 16:47:42,705 INFO L226 Difference]: Without dead ends: 265 [2022-01-18 16:47:42,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=843, Invalid=3713, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:47:42,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 291 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:42,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 134 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:47:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-18 16:47:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 128. [2022-01-18 16:47:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-01-18 16:47:42,712 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-01-18 16:47:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:42,712 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-01-18 16:47:42,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-01-18 16:47:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:42,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:42,713 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] [2022-01-18 16:47:42,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 16:47:42,923 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 16:47:42,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1739125057, now seen corresponding path program 7 times [2022-01-18 16:47:42,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:42,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632006022] [2022-01-18 16:47:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:42,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:43,048 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 16:47:43,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:43,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632006022] [2022-01-18 16:47:43,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632006022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:43,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687749989] [2022-01-18 16:47:43,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:47:43,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:43,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:43,049 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 16:47:43,050 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 16:47:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:47:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:43,410 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 16:47:43,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:43,867 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 16:47:43,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687749989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:43,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:43,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-01-18 16:47:43,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255637250] [2022-01-18 16:47:43,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:43,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:47:43,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:47:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:47:43,868 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:44,497 INFO L93 Difference]: Finished difference Result 234 states and 474 transitions. [2022-01-18 16:47:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 16:47:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:47:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:44,498 INFO L225 Difference]: With dead ends: 234 [2022-01-18 16:47:44,498 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 16:47:44,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:47:44,499 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 166 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:44,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 89 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:47:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 16:47:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 128. [2022-01-18 16:47:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-01-18 16:47:44,510 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-01-18 16:47:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:44,510 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-01-18 16:47:44,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-01-18 16:47:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:44,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:44,511 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] [2022-01-18 16:47:44,528 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 16:47:44,715 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 16:47:44,715 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1223751555, now seen corresponding path program 8 times [2022-01-18 16:47:44,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:44,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332303284] [2022-01-18 16:47:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:44,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:44,864 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 16:47:44,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:44,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332303284] [2022-01-18 16:47:44,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332303284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:44,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839285017] [2022-01-18 16:47:44,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:47:44,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:44,865 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 16:47:44,866 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 16:47:44,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:47:44,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:47:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:45,253 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 16:47:45,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:45,684 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 16:47:45,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839285017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:45,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:45,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 16:47:45,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50039850] [2022-01-18 16:47:45,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:45,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:47:45,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:45,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:47:45,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:47:45,685 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 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 16:47:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:46,555 INFO L93 Difference]: Finished difference Result 294 states and 585 transitions. [2022-01-18 16:47:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:47:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 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 22 [2022-01-18 16:47:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:46,557 INFO L225 Difference]: With dead ends: 294 [2022-01-18 16:47:46,557 INFO L226 Difference]: Without dead ends: 236 [2022-01-18 16:47:46,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=2082, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:47:46,558 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 197 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:46,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 122 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:47:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-18 16:47:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 144. [2022-01-18 16:47:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.0839160839160837) internal successors, (298), 143 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 298 transitions. [2022-01-18 16:47:46,562 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 298 transitions. Word has length 22 [2022-01-18 16:47:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:46,563 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 298 transitions. [2022-01-18 16:47:46,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 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 16:47:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 298 transitions. [2022-01-18 16:47:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:47:46,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:46,563 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] [2022-01-18 16:47:46,579 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 16:47:46,775 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 16:47:46,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash -276952247, now seen corresponding path program 9 times [2022-01-18 16:47:46,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:46,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335440821] [2022-01-18 16:47:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:46,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:47:46,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:46,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335440821] [2022-01-18 16:47:46,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335440821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:46,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066283910] [2022-01-18 16:47:46,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:47:46,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:46,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:46,958 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 16:47:46,959 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 16:47:46,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:47:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:47:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:47,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:48,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066283910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:48,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:48,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-01-18 16:47:48,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703828193] [2022-01-18 16:47:48,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:48,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:47:48,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:47:48,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:47:48,026 INFO L87 Difference]: Start difference. First operand 144 states and 298 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:48,915 INFO L93 Difference]: Finished difference Result 270 states and 507 transitions. [2022-01-18 16:47:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:47:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 16:47:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:48,917 INFO L225 Difference]: With dead ends: 270 [2022-01-18 16:47:48,917 INFO L226 Difference]: Without dead ends: 220 [2022-01-18 16:47:48,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:47:48,918 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:48,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 234 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:47:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-18 16:47:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2022-01-18 16:47:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.037037037037037) internal successors, (330), 162 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 330 transitions. [2022-01-18 16:47:48,922 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 330 transitions. Word has length 24 [2022-01-18 16:47:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:48,922 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 330 transitions. [2022-01-18 16:47:48,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 330 transitions. [2022-01-18 16:47:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:47:48,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:48,923 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] [2022-01-18 16:47:48,939 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 16:47:49,139 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 16:47:49,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1905230277, now seen corresponding path program 10 times [2022-01-18 16:47:49,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:49,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773314025] [2022-01-18 16:47:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:49,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:47:49,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773314025] [2022-01-18 16:47:49,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773314025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909429396] [2022-01-18 16:47:49,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:47:49,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:49,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:49,290 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 16:47:49,291 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 16:47:49,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:47:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:47:49,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:49,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:50,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909429396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:50,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:50,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-01-18 16:47:50,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985763916] [2022-01-18 16:47:50,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:50,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:47:50,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:47:50,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:47:50,283 INFO L87 Difference]: Start difference. First operand 163 states and 330 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:51,446 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2022-01-18 16:47:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:47:51,446 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 16:47:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:51,447 INFO L225 Difference]: With dead ends: 270 [2022-01-18 16:47:51,447 INFO L226 Difference]: Without dead ends: 245 [2022-01-18 16:47:51,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=797, Invalid=3493, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:47:51,449 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:51,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 164 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:47:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-18 16:47:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2022-01-18 16:47:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.03680981595092) internal successors, (332), 163 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 332 transitions. [2022-01-18 16:47:51,452 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 332 transitions. Word has length 24 [2022-01-18 16:47:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:51,452 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 332 transitions. [2022-01-18 16:47:51,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 332 transitions. [2022-01-18 16:47:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:47:51,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:51,455 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] [2022-01-18 16:47:51,470 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 16:47:51,659 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 16:47:51,659 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 290399277, now seen corresponding path program 11 times [2022-01-18 16:47:51,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175861497] [2022-01-18 16:47:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:51,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:51,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175861497] [2022-01-18 16:47:51,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175861497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:51,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839801373] [2022-01-18 16:47:51,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:47:51,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:51,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:51,803 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 16:47:51,803 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 16:47:51,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:47:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:51,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:47:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:52,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:53,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839801373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:53,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:53,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 16:47:53,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167101203] [2022-01-18 16:47:53,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:53,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:47:53,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:47:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:47:53,071 INFO L87 Difference]: Start difference. First operand 164 states and 332 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:55,787 INFO L93 Difference]: Finished difference Result 366 states and 702 transitions. [2022-01-18 16:47:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:47:55,787 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 16:47:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:55,788 INFO L225 Difference]: With dead ends: 366 [2022-01-18 16:47:55,789 INFO L226 Difference]: Without dead ends: 288 [2022-01-18 16:47:55,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=744, Invalid=4086, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:47:55,790 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 283 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:55,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 195 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:47:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-18 16:47:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2022-01-18 16:47:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0418848167539267) internal successors, (390), 191 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 390 transitions. [2022-01-18 16:47:55,794 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 390 transitions. Word has length 24 [2022-01-18 16:47:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:55,794 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 390 transitions. [2022-01-18 16:47:55,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 390 transitions. [2022-01-18 16:47:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:47:55,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:55,795 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] [2022-01-18 16:47:55,810 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 16:47:56,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 16:47:56,007 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2130799989, now seen corresponding path program 12 times [2022-01-18 16:47:56,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:56,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366509926] [2022-01-18 16:47:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:56,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:56,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366509926] [2022-01-18 16:47:56,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366509926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84625414] [2022-01-18 16:47:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:47:56,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:56,174 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 16:47:56,174 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 16:47:56,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:47:56,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:47:56,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:56,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:57,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84625414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:57,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:57,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 16:47:57,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259972656] [2022-01-18 16:47:57,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:57,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:47:57,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:47:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:47:57,384 INFO L87 Difference]: Start difference. First operand 192 states and 390 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:58,049 INFO L93 Difference]: Finished difference Result 272 states and 544 transitions. [2022-01-18 16:47:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:47:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 16:47:58,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:58,050 INFO L225 Difference]: With dead ends: 272 [2022-01-18 16:47:58,050 INFO L226 Difference]: Without dead ends: 246 [2022-01-18 16:47:58,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:47:58,051 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:58,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 91 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:47:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-18 16:47:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 165. [2022-01-18 16:47:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.048780487804878) internal successors, (336), 164 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 336 transitions. [2022-01-18 16:47:58,055 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 336 transitions. Word has length 24 [2022-01-18 16:47:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:58,055 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 336 transitions. [2022-01-18 16:47:58,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 336 transitions. [2022-01-18 16:47:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:47:58,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:58,055 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:58,073 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 16:47:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 16:47:58,268 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -144321993, now seen corresponding path program 13 times [2022-01-18 16:47:58,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:58,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851396707] [2022-01-18 16:47:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:58,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:58,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:58,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851396707] [2022-01-18 16:47:58,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851396707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:58,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528488557] [2022-01-18 16:47:58,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:47:58,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:58,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:58,449 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 16:47:58,450 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 16:47:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:47:58,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:58,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:59,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528488557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:59,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:59,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-01-18 16:47:59,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785099591] [2022-01-18 16:47:59,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:59,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:47:59,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:59,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:47:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:47:59,659 INFO L87 Difference]: Start difference. First operand 165 states and 336 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:03,810 INFO L93 Difference]: Finished difference Result 651 states and 1266 transitions. [2022-01-18 16:48:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 16:48:03,811 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:03,812 INFO L225 Difference]: With dead ends: 651 [2022-01-18 16:48:03,812 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 16:48:03,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5895 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2834, Invalid=12666, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 16:48:03,816 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 477 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:03,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 299 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:48:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 16:48:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 248. [2022-01-18 16:48:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.145748987854251) internal successors, (530), 247 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 530 transitions. [2022-01-18 16:48:03,822 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 530 transitions. Word has length 27 [2022-01-18 16:48:03,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:03,822 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 530 transitions. [2022-01-18 16:48:03,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 530 transitions. [2022-01-18 16:48:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:03,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:03,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:03,838 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 16:48:04,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 16:48:04,030 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash -193889737, now seen corresponding path program 14 times [2022-01-18 16:48:04,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:04,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215972981] [2022-01-18 16:48:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:04,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:04,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215972981] [2022-01-18 16:48:04,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215972981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393955721] [2022-01-18 16:48:04,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:48:04,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:04,214 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 16:48:04,215 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 16:48:04,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:48:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:48:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:04,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:05,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393955721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:05,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:05,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-18 16:48:05,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369285881] [2022-01-18 16:48:05,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:05,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:48:05,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:48:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:48:05,322 INFO L87 Difference]: Start difference. First operand 248 states and 530 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:09,134 INFO L93 Difference]: Finished difference Result 688 states and 1359 transitions. [2022-01-18 16:48:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-18 16:48:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:09,136 INFO L225 Difference]: With dead ends: 688 [2022-01-18 16:48:09,136 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 16:48:09,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6815 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3106, Invalid=15526, Unknown=0, NotChecked=0, Total=18632 [2022-01-18 16:48:09,137 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 553 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:09,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 275 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:48:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 16:48:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 274. [2022-01-18 16:48:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1684981684981683) internal successors, (592), 273 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 592 transitions. [2022-01-18 16:48:09,144 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 592 transitions. Word has length 27 [2022-01-18 16:48:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:09,144 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 592 transitions. [2022-01-18 16:48:09,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 592 transitions. [2022-01-18 16:48:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:09,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:09,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:09,160 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 16:48:09,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 16:48:09,359 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1874386377, now seen corresponding path program 15 times [2022-01-18 16:48:09,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:09,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942120304] [2022-01-18 16:48:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:09,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:09,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:09,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942120304] [2022-01-18 16:48:09,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942120304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:09,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441560532] [2022-01-18 16:48:09,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:48:09,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:09,532 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 16:48:09,533 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 16:48:09,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:48:09,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:09,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:48:09,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:10,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:10,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441560532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:10,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:10,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-18 16:48:10,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234949716] [2022-01-18 16:48:10,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:10,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:48:10,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:48:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:48:10,553 INFO L87 Difference]: Start difference. First operand 274 states and 592 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:14,416 INFO L93 Difference]: Finished difference Result 717 states and 1446 transitions. [2022-01-18 16:48:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 16:48:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:14,418 INFO L225 Difference]: With dead ends: 717 [2022-01-18 16:48:14,418 INFO L226 Difference]: Without dead ends: 659 [2022-01-18 16:48:14,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6823 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3101, Invalid=15805, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 16:48:14,419 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 614 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:14,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 261 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:48:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-18 16:48:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 305. [2022-01-18 16:48:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.2072368421052633) internal successors, (671), 304 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 671 transitions. [2022-01-18 16:48:14,426 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 671 transitions. Word has length 27 [2022-01-18 16:48:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:14,427 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 671 transitions. [2022-01-18 16:48:14,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 671 transitions. [2022-01-18 16:48:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:14,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:14,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:14,445 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 16:48:14,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:14,644 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash -177812937, now seen corresponding path program 16 times [2022-01-18 16:48:14,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:14,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181500987] [2022-01-18 16:48:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:14,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:14,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181500987] [2022-01-18 16:48:14,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181500987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511826857] [2022-01-18 16:48:14,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:48:14,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:14,811 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 16:48:14,812 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 16:48:14,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:48:14,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:48:14,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:15,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:15,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511826857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:15,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:15,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-01-18 16:48:15,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948007745] [2022-01-18 16:48:15,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:15,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:48:15,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:48:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:48:15,784 INFO L87 Difference]: Start difference. First operand 305 states and 671 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:21,252 INFO L93 Difference]: Finished difference Result 852 states and 1700 transitions. [2022-01-18 16:48:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-18 16:48:21,253 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:21,255 INFO L225 Difference]: With dead ends: 852 [2022-01-18 16:48:21,255 INFO L226 Difference]: Without dead ends: 750 [2022-01-18 16:48:21,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4461, Invalid=25295, Unknown=0, NotChecked=0, Total=29756 [2022-01-18 16:48:21,257 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 708 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:21,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 367 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:48:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-01-18 16:48:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 303. [2022-01-18 16:48:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2019867549668874) internal successors, (665), 302 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 665 transitions. [2022-01-18 16:48:21,264 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 665 transitions. Word has length 27 [2022-01-18 16:48:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 665 transitions. [2022-01-18 16:48:21,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 665 transitions. [2022-01-18 16:48:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:21,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:21,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:21,281 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 16:48:21,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 16:48:21,481 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1711244881, now seen corresponding path program 17 times [2022-01-18 16:48:21,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:21,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875637501] [2022-01-18 16:48:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:21,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:21,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:21,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875637501] [2022-01-18 16:48:21,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875637501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:21,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501141408] [2022-01-18 16:48:21,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:48:21,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:21,664 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 16:48:21,664 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 16:48:21,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:48:21,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:48:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:22,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:22,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501141408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:22,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:22,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-01-18 16:48:22,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682062912] [2022-01-18 16:48:22,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:22,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:48:22,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:48:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:48:22,643 INFO L87 Difference]: Start difference. First operand 303 states and 665 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:26,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:26,253 INFO L93 Difference]: Finished difference Result 798 states and 1598 transitions. [2022-01-18 16:48:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 16:48:26,253 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:26,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:26,255 INFO L225 Difference]: With dead ends: 798 [2022-01-18 16:48:26,255 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 16:48:26,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2627, Invalid=13885, Unknown=0, NotChecked=0, Total=16512 [2022-01-18 16:48:26,256 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 647 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:26,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 268 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:48:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 16:48:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 333. [2022-01-18 16:48:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-01-18 16:48:26,264 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-01-18 16:48:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:26,264 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-01-18 16:48:26,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-01-18 16:48:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:26,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:26,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:26,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 16:48:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:26,483 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1426612203, now seen corresponding path program 18 times [2022-01-18 16:48:26,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:26,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484074686] [2022-01-18 16:48:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:26,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:26,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484074686] [2022-01-18 16:48:26,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484074686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692667506] [2022-01-18 16:48:26,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:48:26,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:26,636 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 16:48:26,637 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 16:48:26,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:48:26,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:26,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:48:26,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:27,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:27,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692667506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:27,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:27,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 16:48:27,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400372453] [2022-01-18 16:48:27,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:27,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:48:27,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:48:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:48:27,745 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:30,512 INFO L93 Difference]: Finished difference Result 716 states and 1447 transitions. [2022-01-18 16:48:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:48:30,514 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:30,516 INFO L225 Difference]: With dead ends: 716 [2022-01-18 16:48:30,516 INFO L226 Difference]: Without dead ends: 620 [2022-01-18 16:48:30,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3779 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1995, Invalid=9135, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 16:48:30,518 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 466 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:30,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 236 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:48:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-01-18 16:48:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 333. [2022-01-18 16:48:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-01-18 16:48:30,524 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-01-18 16:48:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:30,525 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-01-18 16:48:30,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-01-18 16:48:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:30,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:30,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:30,541 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 16:48:30,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:30,741 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash 648255859, now seen corresponding path program 19 times [2022-01-18 16:48:30,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:30,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567942736] [2022-01-18 16:48:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:30,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:30,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567942736] [2022-01-18 16:48:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567942736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:30,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349544252] [2022-01-18 16:48:30,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:48:30,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:30,909 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 16:48:30,909 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 16:48:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:30,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:48:30,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:31,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:32,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349544252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:32,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:32,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-18 16:48:32,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614117664] [2022-01-18 16:48:32,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:32,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:48:32,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:48:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:48:32,029 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:35,171 INFO L93 Difference]: Finished difference Result 829 states and 1722 transitions. [2022-01-18 16:48:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 16:48:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:35,173 INFO L225 Difference]: With dead ends: 829 [2022-01-18 16:48:35,173 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 16:48:35,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2169, Invalid=10263, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 16:48:35,174 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 475 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:35,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 273 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:48:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 16:48:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 413. [2022-01-18 16:48:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.25) internal successors, (927), 412 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 927 transitions. [2022-01-18 16:48:35,181 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 927 transitions. Word has length 27 [2022-01-18 16:48:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:35,181 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 927 transitions. [2022-01-18 16:48:35,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 927 transitions. [2022-01-18 16:48:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:35,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:35,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:35,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 16:48:35,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:35,395 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1950137997, now seen corresponding path program 20 times [2022-01-18 16:48:35,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412799045] [2022-01-18 16:48:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:35,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:35,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:35,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412799045] [2022-01-18 16:48:35,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412799045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:35,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033670682] [2022-01-18 16:48:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:48:35,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:35,590 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 16:48:35,596 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 16:48:35,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:48:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:48:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:36,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:36,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033670682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:36,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:36,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-01-18 16:48:36,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030461569] [2022-01-18 16:48:36,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:36,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:48:36,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:48:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:48:36,643 INFO L87 Difference]: Start difference. First operand 413 states and 927 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:41,263 INFO L93 Difference]: Finished difference Result 887 states and 1850 transitions. [2022-01-18 16:48:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-18 16:48:41,263 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:41,266 INFO L225 Difference]: With dead ends: 887 [2022-01-18 16:48:41,266 INFO L226 Difference]: Without dead ends: 771 [2022-01-18 16:48:41,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6515 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3071, Invalid=15835, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 16:48:41,267 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 633 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:41,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 224 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:48:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-01-18 16:48:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 423. [2022-01-18 16:48:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.2369668246445498) internal successors, (944), 422 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 944 transitions. [2022-01-18 16:48:41,275 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 944 transitions. Word has length 27 [2022-01-18 16:48:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:41,275 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 944 transitions. [2022-01-18 16:48:41,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 944 transitions. [2022-01-18 16:48:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:41,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:41,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:41,293 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 16:48:41,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:41,491 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1187719087, now seen corresponding path program 21 times [2022-01-18 16:48:41,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:41,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270130000] [2022-01-18 16:48:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:41,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:41,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:41,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270130000] [2022-01-18 16:48:41,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270130000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127946832] [2022-01-18 16:48:41,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:48:41,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:41,650 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 16:48:41,650 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 16:48:41,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:48:41,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:41,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:48:41,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:42,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:42,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127946832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:42,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:42,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 16:48:42,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656653659] [2022-01-18 16:48:42,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:42,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:48:42,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:48:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:48:42,693 INFO L87 Difference]: Start difference. First operand 423 states and 944 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:45,631 INFO L93 Difference]: Finished difference Result 816 states and 1693 transitions. [2022-01-18 16:48:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:48:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:45,633 INFO L225 Difference]: With dead ends: 816 [2022-01-18 16:48:45,633 INFO L226 Difference]: Without dead ends: 720 [2022-01-18 16:48:45,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2270, Invalid=9940, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 16:48:45,634 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 452 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:45,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 235 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:48:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-18 16:48:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 377. [2022-01-18 16:48:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.223404255319149) internal successors, (836), 376 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 836 transitions. [2022-01-18 16:48:45,641 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 836 transitions. Word has length 27 [2022-01-18 16:48:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:45,641 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 836 transitions. [2022-01-18 16:48:45,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 836 transitions. [2022-01-18 16:48:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:45,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:45,642 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:45,657 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 16:48:45,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 16:48:45,851 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash -144371597, now seen corresponding path program 22 times [2022-01-18 16:48:45,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:45,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593062839] [2022-01-18 16:48:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:45,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:46,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:46,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593062839] [2022-01-18 16:48:46,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593062839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:46,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151218347] [2022-01-18 16:48:46,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:48:46,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:46,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:46,009 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 16:48:46,010 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 16:48:46,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:48:46,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:48:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:47,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151218347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:47,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:47,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 16:48:47,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051823371] [2022-01-18 16:48:47,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:47,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:48:47,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:48:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:48:47,125 INFO L87 Difference]: Start difference. First operand 377 states and 836 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:51,873 INFO L93 Difference]: Finished difference Result 932 states and 1908 transitions. [2022-01-18 16:48:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 16:48:51,873 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:51,875 INFO L225 Difference]: With dead ends: 932 [2022-01-18 16:48:51,875 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 16:48:51,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5616 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3006, Invalid=13250, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 16:48:51,877 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 517 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:51,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 265 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:48:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 16:48:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 422. [2022-01-18 16:48:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.2327790973871733) internal successors, (940), 421 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 940 transitions. [2022-01-18 16:48:51,884 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 940 transitions. Word has length 27 [2022-01-18 16:48:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:51,884 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 940 transitions. [2022-01-18 16:48:51,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 940 transitions. [2022-01-18 16:48:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:51,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:51,885 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:51,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 16:48:52,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 16:48:52,099 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1153733039, now seen corresponding path program 23 times [2022-01-18 16:48:52,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:52,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280910794] [2022-01-18 16:48:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:52,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:52,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:52,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280910794] [2022-01-18 16:48:52,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280910794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:52,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326098665] [2022-01-18 16:48:52,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:48:52,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:52,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:52,236 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 16:48:52,237 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 16:48:52,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:48:52,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:48:52,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:52,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:53,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326098665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:53,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:53,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-01-18 16:48:53,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136114477] [2022-01-18 16:48:53,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:53,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:48:53,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:48:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:48:53,462 INFO L87 Difference]: Start difference. First operand 422 states and 940 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:58,982 INFO L93 Difference]: Finished difference Result 1266 states and 2595 transitions. [2022-01-18 16:48:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 16:48:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:48:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:58,986 INFO L225 Difference]: With dead ends: 1266 [2022-01-18 16:48:58,986 INFO L226 Difference]: Without dead ends: 1245 [2022-01-18 16:48:58,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6389 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3474, Invalid=14082, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 16:48:58,987 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 537 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:58,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 337 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:48:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-01-18 16:48:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 543. [2022-01-18 16:48:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.274907749077491) internal successors, (1233), 542 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1233 transitions. [2022-01-18 16:48:58,998 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1233 transitions. Word has length 27 [2022-01-18 16:48:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:58,998 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1233 transitions. [2022-01-18 16:48:58,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1233 transitions. [2022-01-18 16:48:58,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:48:58,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:58,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:59,016 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 16:48:59,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:59,214 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:48:59,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1444660817, now seen corresponding path program 24 times [2022-01-18 16:48:59,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924127016] [2022-01-18 16:48:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:59,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:59,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924127016] [2022-01-18 16:48:59,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924127016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749922931] [2022-01-18 16:48:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:48:59,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:59,361 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 16:48:59,361 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 16:48:59,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:48:59,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:59,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:48:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:59,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:00,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749922931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:00,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:00,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 16:49:00,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350205543] [2022-01-18 16:49:00,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:00,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:49:00,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:49:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:49:00,423 INFO L87 Difference]: Start difference. First operand 543 states and 1233 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:07,929 INFO L93 Difference]: Finished difference Result 1451 states and 3008 transitions. [2022-01-18 16:49:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-18 16:49:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:07,933 INFO L225 Difference]: With dead ends: 1451 [2022-01-18 16:49:07,933 INFO L226 Difference]: Without dead ends: 1380 [2022-01-18 16:49:07,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12620 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=5319, Invalid=27261, Unknown=0, NotChecked=0, Total=32580 [2022-01-18 16:49:07,935 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 594 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:07,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 471 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:49:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-01-18 16:49:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 579. [2022-01-18 16:49:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.282006920415225) internal successors, (1319), 578 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1319 transitions. [2022-01-18 16:49:07,946 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1319 transitions. Word has length 27 [2022-01-18 16:49:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:07,946 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1319 transitions. [2022-01-18 16:49:07,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1319 transitions. [2022-01-18 16:49:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:07,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:07,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:07,963 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 16:49:08,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:08,154 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1693196267, now seen corresponding path program 25 times [2022-01-18 16:49:08,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:08,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596105021] [2022-01-18 16:49:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:08,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:08,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596105021] [2022-01-18 16:49:08,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596105021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111992444] [2022-01-18 16:49:08,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:49:08,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:08,301 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 16:49:08,301 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 16:49:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:49:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:08,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:09,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111992444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:09,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:09,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-01-18 16:49:09,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197005204] [2022-01-18 16:49:09,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:09,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:49:09,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:49:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:49:09,376 INFO L87 Difference]: Start difference. First operand 579 states and 1319 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:17,188 INFO L93 Difference]: Finished difference Result 1709 states and 3584 transitions. [2022-01-18 16:49:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-18 16:49:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:17,192 INFO L225 Difference]: With dead ends: 1709 [2022-01-18 16:49:17,192 INFO L226 Difference]: Without dead ends: 1641 [2022-01-18 16:49:17,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12214 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5391, Invalid=25409, Unknown=0, NotChecked=0, Total=30800 [2022-01-18 16:49:17,194 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 561 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:17,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 446 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:49:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-01-18 16:49:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 724. [2022-01-18 16:49:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.2835408022130013) internal successors, (1651), 723 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1651 transitions. [2022-01-18 16:49:17,207 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1651 transitions. Word has length 27 [2022-01-18 16:49:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:17,208 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1651 transitions. [2022-01-18 16:49:17,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1651 transitions. [2022-01-18 16:49:17,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:17,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:17,209 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:17,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:17,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 16:49:17,424 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1820958903, now seen corresponding path program 26 times [2022-01-18 16:49:17,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:17,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304091370] [2022-01-18 16:49:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:17,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:49:17,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304091370] [2022-01-18 16:49:17,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304091370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416718614] [2022-01-18 16:49:17,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:49:17,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:17,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:17,594 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 16:49:17,595 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 16:49:17,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:49:17,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:49:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:18,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:18,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416718614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:18,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:18,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-01-18 16:49:18,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095657777] [2022-01-18 16:49:18,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:18,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:49:18,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:49:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:49:18,688 INFO L87 Difference]: Start difference. First operand 724 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:21,613 INFO L93 Difference]: Finished difference Result 1358 states and 2916 transitions. [2022-01-18 16:49:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:49:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:21,616 INFO L225 Difference]: With dead ends: 1358 [2022-01-18 16:49:21,616 INFO L226 Difference]: Without dead ends: 1293 [2022-01-18 16:49:21,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:49:21,617 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 463 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:21,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 302 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:49:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-01-18 16:49:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 833. [2022-01-18 16:49:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.293269230769231) internal successors, (1908), 832 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1908 transitions. [2022-01-18 16:49:21,629 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1908 transitions. Word has length 27 [2022-01-18 16:49:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:21,630 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1908 transitions. [2022-01-18 16:49:21,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1908 transitions. [2022-01-18 16:49:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:21,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:21,631 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:21,646 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 16:49:21,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 16:49:21,846 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash 140462263, now seen corresponding path program 27 times [2022-01-18 16:49:21,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:21,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748257689] [2022-01-18 16:49:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:21,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:49:21,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748257689] [2022-01-18 16:49:21,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748257689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341876518] [2022-01-18 16:49:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:49:21,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:21,994 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 16:49:21,994 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 16:49:22,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:49:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:49:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:22,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:23,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341876518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:23,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:23,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-01-18 16:49:23,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723831048] [2022-01-18 16:49:23,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:23,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:49:23,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:49:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:49:23,024 INFO L87 Difference]: Start difference. First operand 833 states and 1908 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:25,757 INFO L93 Difference]: Finished difference Result 1227 states and 2641 transitions. [2022-01-18 16:49:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:49:25,758 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:25,761 INFO L225 Difference]: With dead ends: 1227 [2022-01-18 16:49:25,761 INFO L226 Difference]: Without dead ends: 1213 [2022-01-18 16:49:25,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1752, Invalid=8348, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:49:25,762 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 502 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:25,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 219 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:49:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-01-18 16:49:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 859. [2022-01-18 16:49:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.296037296037296) internal successors, (1970), 858 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1970 transitions. [2022-01-18 16:49:25,774 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1970 transitions. Word has length 27 [2022-01-18 16:49:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:25,775 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1970 transitions. [2022-01-18 16:49:25,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1970 transitions. [2022-01-18 16:49:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:25,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:25,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:25,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:25,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 16:49:25,983 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1837035703, now seen corresponding path program 28 times [2022-01-18 16:49:25,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:25,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111234876] [2022-01-18 16:49:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:25,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:49:26,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:26,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111234876] [2022-01-18 16:49:26,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111234876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276842118] [2022-01-18 16:49:26,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:49:26,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:26,145 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 16:49:26,146 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 16:49:26,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:49:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:49:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:26,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:27,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276842118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:27,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:27,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 16:49:27,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305322474] [2022-01-18 16:49:27,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:27,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:49:27,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:27,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:49:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:49:27,150 INFO L87 Difference]: Start difference. First operand 859 states and 1970 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:31,596 INFO L93 Difference]: Finished difference Result 1463 states and 3165 transitions. [2022-01-18 16:49:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 16:49:31,596 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:31,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:31,608 INFO L225 Difference]: With dead ends: 1463 [2022-01-18 16:49:31,608 INFO L226 Difference]: Without dead ends: 1361 [2022-01-18 16:49:31,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2835, Invalid=14987, Unknown=0, NotChecked=0, Total=17822 [2022-01-18 16:49:31,609 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 686 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:31,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 297 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:49:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-01-18 16:49:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 857. [2022-01-18 16:49:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.294392523364486) internal successors, (1964), 856 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1964 transitions. [2022-01-18 16:49:31,622 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1964 transitions. Word has length 27 [2022-01-18 16:49:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:31,622 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1964 transitions. [2022-01-18 16:49:31,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1964 transitions. [2022-01-18 16:49:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:31,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:31,623 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:31,639 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 16:49:31,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:31,839 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash -778012489, now seen corresponding path program 29 times [2022-01-18 16:49:31,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:31,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630355639] [2022-01-18 16:49:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:31,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:49:31,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630355639] [2022-01-18 16:49:31,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630355639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311201057] [2022-01-18 16:49:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:49:31,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:31,979 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 16:49:31,980 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 16:49:31,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:49:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:49:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:32,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:33,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311201057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:33,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:33,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-01-18 16:49:33,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948596633] [2022-01-18 16:49:33,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:33,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:49:33,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:49:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:49:33,101 INFO L87 Difference]: Start difference. First operand 857 states and 1964 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:36,065 INFO L93 Difference]: Finished difference Result 1458 states and 3123 transitions. [2022-01-18 16:49:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:49:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:36,070 INFO L225 Difference]: With dead ends: 1458 [2022-01-18 16:49:36,070 INFO L226 Difference]: Without dead ends: 1400 [2022-01-18 16:49:36,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1851, Invalid=8451, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 16:49:36,071 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 366 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:36,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 262 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:49:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-01-18 16:49:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 888. [2022-01-18 16:49:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.2953776775648254) internal successors, (2036), 887 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2036 transitions. [2022-01-18 16:49:36,085 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2036 transitions. Word has length 27 [2022-01-18 16:49:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:36,085 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2036 transitions. [2022-01-18 16:49:36,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2036 transitions. [2022-01-18 16:49:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:36,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:36,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:36,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:36,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:36,302 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash 918560951, now seen corresponding path program 30 times [2022-01-18 16:49:36,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:36,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950726485] [2022-01-18 16:49:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:36,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:49:36,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:36,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950726485] [2022-01-18 16:49:36,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950726485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:36,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221189634] [2022-01-18 16:49:36,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:49:36,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:36,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:36,495 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 16:49:36,497 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 16:49:36,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:49:36,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:36,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:49:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:36,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:37,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221189634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:37,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:37,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 16:49:37,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047951463] [2022-01-18 16:49:37,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:37,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:49:37,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:49:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:49:37,537 INFO L87 Difference]: Start difference. First operand 888 states and 2036 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:41,772 INFO L93 Difference]: Finished difference Result 1565 states and 3427 transitions. [2022-01-18 16:49:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 16:49:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:41,776 INFO L225 Difference]: With dead ends: 1565 [2022-01-18 16:49:41,776 INFO L226 Difference]: Without dead ends: 1463 [2022-01-18 16:49:41,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5381 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2608, Invalid=13394, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 16:49:41,778 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 607 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:41,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 219 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:49:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-01-18 16:49:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 915. [2022-01-18 16:49:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.2964989059080962) internal successors, (2099), 914 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2099 transitions. [2022-01-18 16:49:41,792 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2099 transitions. Word has length 27 [2022-01-18 16:49:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:41,792 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2099 transitions. [2022-01-18 16:49:41,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2099 transitions. [2022-01-18 16:49:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:41,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:41,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:41,808 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 16:49:42,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:42,000 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash -238549261, now seen corresponding path program 31 times [2022-01-18 16:49:42,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:42,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781340917] [2022-01-18 16:49:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:42,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:49:42,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781340917] [2022-01-18 16:49:42,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781340917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600200717] [2022-01-18 16:49:42,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:49:42,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:42,162 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 16:49:42,163 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 16:49:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:49:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:42,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:43,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600200717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:43,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:43,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-01-18 16:49:43,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312226648] [2022-01-18 16:49:43,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:43,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:49:43,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:49:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:49:43,218 INFO L87 Difference]: Start difference. First operand 915 states and 2099 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:47,085 INFO L93 Difference]: Finished difference Result 1839 states and 4025 transitions. [2022-01-18 16:49:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 16:49:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:47,089 INFO L225 Difference]: With dead ends: 1839 [2022-01-18 16:49:47,090 INFO L226 Difference]: Without dead ends: 1743 [2022-01-18 16:49:47,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2389, Invalid=10721, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 16:49:47,091 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 458 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:47,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 253 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:49:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-01-18 16:49:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 932. [2022-01-18 16:49:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.297529538131042) internal successors, (2139), 931 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2139 transitions. [2022-01-18 16:49:47,106 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2139 transitions. Word has length 27 [2022-01-18 16:49:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:47,106 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 2139 transitions. [2022-01-18 16:49:47,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2139 transitions. [2022-01-18 16:49:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:47,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:47,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:47,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:47,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 16:49:47,313 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash -198928785, now seen corresponding path program 32 times [2022-01-18 16:49:47,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:47,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201032358] [2022-01-18 16:49:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:47,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:47,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:47,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201032358] [2022-01-18 16:49:47,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201032358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:47,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209954569] [2022-01-18 16:49:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:49:47,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:47,452 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 16:49:47,453 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 16:49:47,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:49:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:47,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:49:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:47,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:48,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209954569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:48,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:48,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 16:49:48,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394670211] [2022-01-18 16:49:48,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:48,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:49:48,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:49:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:49:48,489 INFO L87 Difference]: Start difference. First operand 932 states and 2139 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:53,043 INFO L93 Difference]: Finished difference Result 1851 states and 3994 transitions. [2022-01-18 16:49:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-18 16:49:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:53,047 INFO L225 Difference]: With dead ends: 1851 [2022-01-18 16:49:53,047 INFO L226 Difference]: Without dead ends: 1783 [2022-01-18 16:49:53,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2998, Invalid=14558, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 16:49:53,049 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 542 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:53,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 459 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:49:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-01-18 16:49:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1050. [2022-01-18 16:49:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.3040991420400383) internal successors, (2417), 1049 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2417 transitions. [2022-01-18 16:49:53,064 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2417 transitions. Word has length 27 [2022-01-18 16:49:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:53,065 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2417 transitions. [2022-01-18 16:49:53,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2417 transitions. [2022-01-18 16:49:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:53,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:53,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:53,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:53,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:53,271 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1880365043, now seen corresponding path program 33 times [2022-01-18 16:49:53,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728206273] [2022-01-18 16:49:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:53,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:53,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:53,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728206273] [2022-01-18 16:49:53,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728206273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:53,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966220720] [2022-01-18 16:49:53,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:49:53,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:53,429 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 16:49:53,430 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 16:49:53,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:49:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:53,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:49:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:53,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:54,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966220720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:54,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:54,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 16:49:54,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625526042] [2022-01-18 16:49:54,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:54,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:49:54,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:49:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:49:54,481 INFO L87 Difference]: Start difference. First operand 1050 states and 2417 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:59,291 INFO L93 Difference]: Finished difference Result 1673 states and 3668 transitions. [2022-01-18 16:49:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 16:49:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:49:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:59,295 INFO L225 Difference]: With dead ends: 1673 [2022-01-18 16:49:59,295 INFO L226 Difference]: Without dead ends: 1653 [2022-01-18 16:49:59,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3318, Invalid=15864, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 16:49:59,296 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 491 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:59,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 369 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:49:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-01-18 16:49:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1055. [2022-01-18 16:49:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3026565464895636) internal successors, (2427), 1054 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2427 transitions. [2022-01-18 16:49:59,311 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2427 transitions. Word has length 27 [2022-01-18 16:49:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:59,312 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 2427 transitions. [2022-01-18 16:49:59,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2427 transitions. [2022-01-18 16:49:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:49:59,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:59,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:59,328 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 16:49:59,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:59,516 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1651423031, now seen corresponding path program 34 times [2022-01-18 16:49:59,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:59,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648875064] [2022-01-18 16:49:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:59,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:59,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:59,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648875064] [2022-01-18 16:49:59,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648875064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:59,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902119440] [2022-01-18 16:49:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:49:59,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:59,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:59,660 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 16:49:59,661 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 16:49:59,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:49:59,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:49:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:00,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:00,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902119440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:00,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:00,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-01-18 16:50:00,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731781415] [2022-01-18 16:50:00,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:00,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:50:00,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:50:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:50:00,687 INFO L87 Difference]: Start difference. First operand 1055 states and 2427 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:04,563 INFO L93 Difference]: Finished difference Result 1976 states and 4378 transitions. [2022-01-18 16:50:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 16:50:04,563 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:50:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:04,566 INFO L225 Difference]: With dead ends: 1976 [2022-01-18 16:50:04,566 INFO L226 Difference]: Without dead ends: 1956 [2022-01-18 16:50:04,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2716, Invalid=13286, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 16:50:04,567 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:04,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 402 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:50:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-01-18 16:50:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1050. [2022-01-18 16:50:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.296472831267874) internal successors, (2409), 1049 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2409 transitions. [2022-01-18 16:50:04,582 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2409 transitions. Word has length 27 [2022-01-18 16:50:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:04,582 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2409 transitions. [2022-01-18 16:50:04,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:04,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2409 transitions. [2022-01-18 16:50:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:50:04,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:04,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:04,599 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 16:50:04,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 16:50:04,799 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1716949619, now seen corresponding path program 35 times [2022-01-18 16:50:04,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678579737] [2022-01-18 16:50:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:04,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:04,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:04,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678579737] [2022-01-18 16:50:04,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678579737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:04,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387450025] [2022-01-18 16:50:04,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:50:04,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:04,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:04,938 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 16:50:04,939 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 16:50:04,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:50:04,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:50:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:05,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:06,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387450025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:06,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:06,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 16:50:06,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488269188] [2022-01-18 16:50:06,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:06,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:50:06,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:50:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:50:06,036 INFO L87 Difference]: Start difference. First operand 1050 states and 2409 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:09,780 INFO L93 Difference]: Finished difference Result 1991 states and 4278 transitions. [2022-01-18 16:50:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 16:50:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:50:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:09,783 INFO L225 Difference]: With dead ends: 1991 [2022-01-18 16:50:09,784 INFO L226 Difference]: Without dead ends: 1916 [2022-01-18 16:50:09,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2234, Invalid=10198, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 16:50:09,784 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 488 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:09,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 482 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:50:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-01-18 16:50:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1300. [2022-01-18 16:50:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.311008468052348) internal successors, (3002), 1299 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3002 transitions. [2022-01-18 16:50:09,801 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3002 transitions. Word has length 27 [2022-01-18 16:50:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:09,801 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3002 transitions. [2022-01-18 16:50:09,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3002 transitions. [2022-01-18 16:50:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:50:09,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:09,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:09,819 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 16:50:10,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 16:50:10,003 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash 36452979, now seen corresponding path program 36 times [2022-01-18 16:50:10,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:10,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379796061] [2022-01-18 16:50:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:10,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:10,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:10,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379796061] [2022-01-18 16:50:10,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379796061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:10,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257997492] [2022-01-18 16:50:10,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:50:10,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:10,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:10,168 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 16:50:10,169 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 16:50:10,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:50:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:10,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:50:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:10,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:11,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257997492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:11,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:11,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 16:50:11,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102233434] [2022-01-18 16:50:11,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:50:11,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:50:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:50:11,196 INFO L87 Difference]: Start difference. First operand 1300 states and 3002 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:15,340 INFO L93 Difference]: Finished difference Result 2024 states and 4411 transitions. [2022-01-18 16:50:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 16:50:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:50:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:15,343 INFO L225 Difference]: With dead ends: 2024 [2022-01-18 16:50:15,343 INFO L226 Difference]: Without dead ends: 1956 [2022-01-18 16:50:15,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6231 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2873, Invalid=14683, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 16:50:15,345 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 583 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:15,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 469 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:50:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-01-18 16:50:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1238. [2022-01-18 16:50:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.320129345189976) internal successors, (2870), 1237 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2870 transitions. [2022-01-18 16:50:15,361 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2870 transitions. Word has length 27 [2022-01-18 16:50:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:15,361 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2870 transitions. [2022-01-18 16:50:15,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2870 transitions. [2022-01-18 16:50:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:50:15,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:15,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:15,379 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 16:50:15,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 16:50:15,563 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1733026419, now seen corresponding path program 37 times [2022-01-18 16:50:15,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:15,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844206810] [2022-01-18 16:50:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:15,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:15,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:15,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844206810] [2022-01-18 16:50:15,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844206810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:15,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724308315] [2022-01-18 16:50:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:50:15,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:15,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:15,705 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 16:50:15,732 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 16:50:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:15,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:50:15,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:16,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724308315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:16,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:16,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-01-18 16:50:16,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403915579] [2022-01-18 16:50:16,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:16,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:50:16,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:16,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:50:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:50:16,718 INFO L87 Difference]: Start difference. First operand 1238 states and 2870 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:21,375 INFO L93 Difference]: Finished difference Result 2027 states and 4488 transitions. [2022-01-18 16:50:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-18 16:50:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:50:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:21,379 INFO L225 Difference]: With dead ends: 2027 [2022-01-18 16:50:21,379 INFO L226 Difference]: Without dead ends: 1956 [2022-01-18 16:50:21,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7003 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3164, Invalid=16576, Unknown=0, NotChecked=0, Total=19740 [2022-01-18 16:50:21,380 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 589 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:21,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 376 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:50:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-01-18 16:50:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1210. [2022-01-18 16:50:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 2.3118279569892475) internal successors, (2795), 1209 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2795 transitions. [2022-01-18 16:50:21,397 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2795 transitions. Word has length 27 [2022-01-18 16:50:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:21,398 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 2795 transitions. [2022-01-18 16:50:21,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:21,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2795 transitions. [2022-01-18 16:50:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:50:21,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:21,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:21,414 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 16:50:21,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 16:50:21,614 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 989532139, now seen corresponding path program 38 times [2022-01-18 16:50:21,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:21,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459375299] [2022-01-18 16:50:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:21,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:21,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:21,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459375299] [2022-01-18 16:50:21,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459375299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537632828] [2022-01-18 16:50:21,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:50:21,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:21,781 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 16:50:21,781 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 16:50:21,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:50:21,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:50:21,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:22,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:22,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537632828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:22,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:22,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 16:50:22,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413392788] [2022-01-18 16:50:22,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:22,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:50:22,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:50:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:50:22,795 INFO L87 Difference]: Start difference. First operand 1210 states and 2795 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:25,738 INFO L93 Difference]: Finished difference Result 1819 states and 4016 transitions. [2022-01-18 16:50:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 16:50:25,738 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:50:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:25,741 INFO L225 Difference]: With dead ends: 1819 [2022-01-18 16:50:25,741 INFO L226 Difference]: Without dead ends: 1761 [2022-01-18 16:50:25,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1688, Invalid=6868, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:50:25,742 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 406 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:25,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 413 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:50:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-01-18 16:50:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1251. [2022-01-18 16:50:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.3112) internal successors, (2889), 1250 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2889 transitions. [2022-01-18 16:50:25,758 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2889 transitions. Word has length 27 [2022-01-18 16:50:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:25,758 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 2889 transitions. [2022-01-18 16:50:25,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2889 transitions. [2022-01-18 16:50:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:50:25,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:25,759 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:25,783 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 16:50:25,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 16:50:25,975 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash -342558545, now seen corresponding path program 39 times [2022-01-18 16:50:25,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:25,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802277287] [2022-01-18 16:50:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:25,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:26,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802277287] [2022-01-18 16:50:26,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802277287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749273484] [2022-01-18 16:50:26,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:50:26,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:26,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:26,133 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 16:50:26,133 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 16:50:26,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:50:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:50:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:26,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749273484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:27,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:27,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-01-18 16:50:27,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795621459] [2022-01-18 16:50:27,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:27,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:50:27,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:50:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:50:27,214 INFO L87 Difference]: Start difference. First operand 1251 states and 2889 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:31,563 INFO L93 Difference]: Finished difference Result 2034 states and 4490 transitions. [2022-01-18 16:50:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 16:50:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:50:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:31,565 INFO L225 Difference]: With dead ends: 2034 [2022-01-18 16:50:31,566 INFO L226 Difference]: Without dead ends: 1966 [2022-01-18 16:50:31,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5137 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2605, Invalid=12401, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 16:50:31,567 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:31,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 300 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:50:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-01-18 16:50:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1192. [2022-01-18 16:50:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.311502938706969) internal successors, (2753), 1191 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2753 transitions. [2022-01-18 16:50:31,583 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2753 transitions. Word has length 27 [2022-01-18 16:50:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:31,583 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 2753 transitions. [2022-01-18 16:50:31,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2753 transitions. [2022-01-18 16:50:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:50:31,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:31,585 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:31,599 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 16:50:31,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 16:50:31,785 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 56938553, now seen corresponding path program 40 times [2022-01-18 16:50:31,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180677429] [2022-01-18 16:50:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:31,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 16:50:31,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180677429] [2022-01-18 16:50:31,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180677429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:31,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957271990] [2022-01-18 16:50:31,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:50:31,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:31,927 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 16:50:31,928 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 16:50:31,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:50:31,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:31,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:50:31,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:32,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:33,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957271990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:33,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:33,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-01-18 16:50:33,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796586603] [2022-01-18 16:50:33,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:33,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:50:33,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:33,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:50:33,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:50:33,288 INFO L87 Difference]: Start difference. First operand 1192 states and 2753 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:36,206 INFO L93 Difference]: Finished difference Result 2673 states and 6185 transitions. [2022-01-18 16:50:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:50:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:50:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:36,209 INFO L225 Difference]: With dead ends: 2673 [2022-01-18 16:50:36,209 INFO L226 Difference]: Without dead ends: 2542 [2022-01-18 16:50:36,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1411, Invalid=7145, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:50:36,210 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 295 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:36,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 230 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:50:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-01-18 16:50:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 595. [2022-01-18 16:50:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0336700336700337) internal successors, (1208), 594 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1208 transitions. [2022-01-18 16:50:36,222 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1208 transitions. Word has length 29 [2022-01-18 16:50:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:36,222 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1208 transitions. [2022-01-18 16:50:36,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1208 transitions. [2022-01-18 16:50:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:50:36,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:36,223 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:36,241 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 16:50:36,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 16:50:36,439 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:36,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1849159349, now seen corresponding path program 41 times [2022-01-18 16:50:36,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:36,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582808623] [2022-01-18 16:50:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:36,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:50:36,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582808623] [2022-01-18 16:50:36,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582808623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252907858] [2022-01-18 16:50:36,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:50:36,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:36,600 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 16:50:36,603 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 16:50:36,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:50:36,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:36,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:50:36,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:37,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:37,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252907858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:37,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:37,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-01-18 16:50:37,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598853513] [2022-01-18 16:50:37,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:37,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:50:37,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:50:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:50:37,975 INFO L87 Difference]: Start difference. First operand 595 states and 1208 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:40,453 INFO L93 Difference]: Finished difference Result 908 states and 1838 transitions. [2022-01-18 16:50:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:50:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:50:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:40,454 INFO L225 Difference]: With dead ends: 908 [2022-01-18 16:50:40,454 INFO L226 Difference]: Without dead ends: 883 [2022-01-18 16:50:40,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1393, Invalid=7537, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 16:50:40,456 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 290 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:40,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 121 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:50:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-18 16:50:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 589. [2022-01-18 16:50:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0051020408163267) internal successors, (1179), 588 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1179 transitions. [2022-01-18 16:50:40,463 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1179 transitions. Word has length 29 [2022-01-18 16:50:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:40,463 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1179 transitions. [2022-01-18 16:50:40,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1179 transitions. [2022-01-18 16:50:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:50:40,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:40,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:40,480 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 16:50:40,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 16:50:40,679 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1727060569, now seen corresponding path program 42 times [2022-01-18 16:50:40,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:40,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148028664] [2022-01-18 16:50:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:40,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:40,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148028664] [2022-01-18 16:50:40,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148028664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786624765] [2022-01-18 16:50:40,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:50:40,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:40,865 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 16:50:40,866 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 16:50:40,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:50:40,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:50:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:42,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786624765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:42,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:42,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 16:50:42,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872689097] [2022-01-18 16:50:42,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:42,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:50:42,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:50:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:50:42,832 INFO L87 Difference]: Start difference. First operand 589 states and 1179 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:48,427 INFO L93 Difference]: Finished difference Result 1179 states and 2345 transitions. [2022-01-18 16:50:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 16:50:48,427 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:50:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:48,428 INFO L225 Difference]: With dead ends: 1179 [2022-01-18 16:50:48,429 INFO L226 Difference]: Without dead ends: 1136 [2022-01-18 16:50:48,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3128 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1522, Invalid=8578, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:50:48,429 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 288 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:48,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 98 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:50:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-18 16:50:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 759. [2022-01-18 16:50:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.0026385224274406) internal successors, (1518), 758 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1518 transitions. [2022-01-18 16:50:48,437 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1518 transitions. Word has length 29 [2022-01-18 16:50:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:48,437 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1518 transitions. [2022-01-18 16:50:48,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1518 transitions. [2022-01-18 16:50:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:50:48,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:48,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:48,453 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 16:50:48,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:48,654 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:48,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1863336609, now seen corresponding path program 43 times [2022-01-18 16:50:48,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:48,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181582337] [2022-01-18 16:50:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:48,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:48,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181582337] [2022-01-18 16:50:48,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181582337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534643075] [2022-01-18 16:50:48,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:50:48,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:48,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:48,878 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 16:50:48,879 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 16:50:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:50:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:49,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:50,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534643075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:50,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:50,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 16:50:50,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750794025] [2022-01-18 16:50:50,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:50,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:50:50,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:50:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:50:50,794 INFO L87 Difference]: Start difference. First operand 759 states and 1518 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:57,018 INFO L93 Difference]: Finished difference Result 1815 states and 3619 transitions. [2022-01-18 16:50:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:50:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:50:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:57,021 INFO L225 Difference]: With dead ends: 1815 [2022-01-18 16:50:57,021 INFO L226 Difference]: Without dead ends: 1769 [2022-01-18 16:50:57,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1903, Invalid=10307, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 16:50:57,021 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:57,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 107 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:50:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-01-18 16:50:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1016. [2022-01-18 16:50:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.0009852216748767) internal successors, (2031), 1015 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2031 transitions. [2022-01-18 16:50:57,034 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2031 transitions. Word has length 29 [2022-01-18 16:50:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:57,034 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2031 transitions. [2022-01-18 16:50:57,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2031 transitions. [2022-01-18 16:50:57,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:50:57,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:57,035 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:57,052 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 16:50:57,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:57,247 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1925315549, now seen corresponding path program 44 times [2022-01-18 16:50:57,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:57,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873855020] [2022-01-18 16:50:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:57,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:57,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873855020] [2022-01-18 16:50:57,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873855020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:57,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098276968] [2022-01-18 16:50:57,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:50:57,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:57,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:57,411 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 16:50:57,414 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 16:50:57,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:50:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:57,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:50:57,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:58,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:59,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098276968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:59,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:59,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 16:50:59,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957375175] [2022-01-18 16:50:59,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:59,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:50:59,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:50:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:50:59,100 INFO L87 Difference]: Start difference. First operand 1016 states and 2031 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:04,461 INFO L93 Difference]: Finished difference Result 2259 states and 4514 transitions. [2022-01-18 16:51:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 16:51:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:51:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:04,464 INFO L225 Difference]: With dead ends: 2259 [2022-01-18 16:51:04,464 INFO L226 Difference]: Without dead ends: 2223 [2022-01-18 16:51:04,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2498, Invalid=13252, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 16:51:04,465 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 278 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:04,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 135 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:51:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-01-18 16:51:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1208. [2022-01-18 16:51:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.003314001657001) internal successors, (2418), 1207 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2418 transitions. [2022-01-18 16:51:04,480 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2418 transitions. Word has length 29 [2022-01-18 16:51:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:04,481 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 2418 transitions. [2022-01-18 16:51:04,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2418 transitions. [2022-01-18 16:51:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:51:04,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:04,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:04,499 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 16:51:04,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 16:51:04,683 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash 849604393, now seen corresponding path program 45 times [2022-01-18 16:51:04,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:04,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800285999] [2022-01-18 16:51:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:04,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:04,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:04,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800285999] [2022-01-18 16:51:04,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800285999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:04,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023323035] [2022-01-18 16:51:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:51:04,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:04,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:04,867 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 16:51:04,868 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 16:51:04,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:51:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:51:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:05,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:06,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023323035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:06,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:06,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 16:51:06,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043422177] [2022-01-18 16:51:06,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:06,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:51:06,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:51:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:51:06,525 INFO L87 Difference]: Start difference. First operand 1208 states and 2418 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:10,968 INFO L93 Difference]: Finished difference Result 2363 states and 4723 transitions. [2022-01-18 16:51:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-18 16:51:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:51:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:10,971 INFO L225 Difference]: With dead ends: 2363 [2022-01-18 16:51:10,971 INFO L226 Difference]: Without dead ends: 2333 [2022-01-18 16:51:10,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4580 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2095, Invalid=11015, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 16:51:10,972 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:10,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 168 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:51:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-01-18 16:51:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1213. [2022-01-18 16:51:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.004125412541254) internal successors, (2429), 1212 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2429 transitions. [2022-01-18 16:51:10,990 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2429 transitions. Word has length 29 [2022-01-18 16:51:10,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:10,990 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2429 transitions. [2022-01-18 16:51:10,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2429 transitions. [2022-01-18 16:51:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:51:10,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:10,991 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:11,007 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 16:51:11,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 16:51:11,207 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:11,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2097362907, now seen corresponding path program 46 times [2022-01-18 16:51:11,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:11,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666907851] [2022-01-18 16:51:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:11,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:51:11,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666907851] [2022-01-18 16:51:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666907851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277211064] [2022-01-18 16:51:11,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:51:11,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:11,416 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 16:51:11,419 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 16:51:11,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:51:11,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:51:11,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:12,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:13,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277211064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:13,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:13,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 16:51:13,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992294203] [2022-01-18 16:51:13,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:13,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:51:13,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:13,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:51:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:51:13,124 INFO L87 Difference]: Start difference. First operand 1213 states and 2429 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:17,818 INFO L93 Difference]: Finished difference Result 2885 states and 5768 transitions. [2022-01-18 16:51:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:51:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:51:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:17,821 INFO L225 Difference]: With dead ends: 2885 [2022-01-18 16:51:17,821 INFO L226 Difference]: Without dead ends: 2834 [2022-01-18 16:51:17,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1895, Invalid=10315, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 16:51:17,822 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:17,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 186 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:51:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-01-18 16:51:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1824. [2022-01-18 16:51:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.0098738343390017) internal successors, (3664), 1823 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3664 transitions. [2022-01-18 16:51:17,843 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3664 transitions. Word has length 29 [2022-01-18 16:51:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:17,843 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 3664 transitions. [2022-01-18 16:51:17,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3664 transitions. [2022-01-18 16:51:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:51:17,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:17,845 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:17,860 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 16:51:18,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 16:51:18,046 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:18,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash 110491549, now seen corresponding path program 47 times [2022-01-18 16:51:18,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:18,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766197685] [2022-01-18 16:51:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:18,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:18,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:18,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766197685] [2022-01-18 16:51:18,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766197685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:18,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868180731] [2022-01-18 16:51:18,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:51:18,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:18,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:18,222 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 16:51:18,223 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 16:51:18,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:51:18,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:51:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:18,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:20,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868180731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:20,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:20,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 16:51:20,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586022602] [2022-01-18 16:51:20,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:20,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:51:20,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:51:20,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:51:20,049 INFO L87 Difference]: Start difference. First operand 1824 states and 3664 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:23,300 INFO L93 Difference]: Finished difference Result 3116 states and 6260 transitions. [2022-01-18 16:51:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:51:23,301 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:51:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:23,304 INFO L225 Difference]: With dead ends: 3116 [2022-01-18 16:51:23,304 INFO L226 Difference]: Without dead ends: 3065 [2022-01-18 16:51:23,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1379, Invalid=7933, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:51:23,305 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:23,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 192 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:51:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-01-18 16:51:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 1021. [2022-01-18 16:51:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.996078431372549) internal successors, (2036), 1020 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2036 transitions. [2022-01-18 16:51:23,320 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2036 transitions. Word has length 29 [2022-01-18 16:51:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:23,321 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2036 transitions. [2022-01-18 16:51:23,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2036 transitions. [2022-01-18 16:51:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:51:23,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:23,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:23,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 16:51:23,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:23,522 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:23,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1219843941, now seen corresponding path program 48 times [2022-01-18 16:51:23,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:23,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813042648] [2022-01-18 16:51:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:23,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:23,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813042648] [2022-01-18 16:51:23,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813042648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410238686] [2022-01-18 16:51:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:51:23,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:23,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:23,724 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 16:51:23,754 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 16:51:23,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:51:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:51:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:24,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:25,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410238686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:25,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:25,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 16:51:25,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955470314] [2022-01-18 16:51:25,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:25,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:51:25,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:51:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:51:25,575 INFO L87 Difference]: Start difference. First operand 1021 states and 2036 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:27,902 INFO L93 Difference]: Finished difference Result 1676 states and 3347 transitions. [2022-01-18 16:51:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:51:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:51:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:27,903 INFO L225 Difference]: With dead ends: 1676 [2022-01-18 16:51:27,903 INFO L226 Difference]: Without dead ends: 0 [2022-01-18 16:51:27,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1156, Invalid=6500, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:51:27,904 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 254 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:27,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 118 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:51:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-18 16:51:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-18 16:51:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-18 16:51:27,905 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-01-18 16:51:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:27,905 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-18 16:51:27,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-18 16:51:27,905 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-18 16:51:27,907 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 16:51:27,907 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 16:51:27,907 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 16:51:27,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 16:51:28,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 16:51:28,110 INFO L732 BasicCegarLoop]: Path program histogram: [48, 1, 1] [2022-01-18 16:51:28,111 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:51:28,111 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:51:28,113 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:51:28 BasicIcfg [2022-01-18 16:51:28,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:51:28,113 INFO L158 Benchmark]: Toolchain (without parser) took 238137.88ms. Allocated memory was 442.5MB in the beginning and 595.6MB in the end (delta: 153.1MB). Free memory was 404.4MB in the beginning and 569.1MB in the end (delta: -164.6MB). Peak memory consumption was 345.0MB. Max. memory is 16.0GB. [2022-01-18 16:51:28,113 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 442.5MB. Free memory is still 405.5MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:51:28,113 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.83ms. Allocated memory is still 442.5MB. Free memory was 404.4MB in the beginning and 402.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:51:28,113 INFO L158 Benchmark]: Boogie Preprocessor took 9.80ms. Allocated memory is still 442.5MB. Free memory was 402.9MB in the beginning and 401.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:51:28,113 INFO L158 Benchmark]: RCFGBuilder took 183.47ms. Allocated memory is still 442.5MB. Free memory was 401.9MB in the beginning and 392.7MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 16:51:28,113 INFO L158 Benchmark]: TraceAbstraction took 237924.25ms. Allocated memory was 442.5MB in the beginning and 595.6MB in the end (delta: 153.1MB). Free memory was 392.1MB in the beginning and 569.1MB in the end (delta: -176.9MB). Peak memory consumption was 332.4MB. Max. memory is 16.0GB. [2022-01-18 16:51:28,114 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 0.10ms. Allocated memory is still 442.5MB. Free memory is still 405.5MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 16.83ms. Allocated memory is still 442.5MB. Free memory was 404.4MB in the beginning and 402.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 9.80ms. Allocated memory is still 442.5MB. Free memory was 402.9MB in the beginning and 401.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 183.47ms. Allocated memory is still 442.5MB. Free memory was 401.9MB in the beginning and 392.7MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 237924.25ms. Allocated memory was 442.5MB in the beginning and 595.6MB in the end (delta: 153.1MB). Free memory was 392.1MB in the beginning and 569.1MB in the end (delta: -176.9MB). Peak memory consumption was 332.4MB. 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 - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 237.9s, OverallIterations: 50, TraceHistogramMax: 4, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.0s, AutomataDifference: 164.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19404 SdHoareTripleChecker+Valid, 28.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19404 mSDsluCounter, 11858 SdHoareTripleChecker+Invalid, 24.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18380 mSDsCounter, 9590 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66015 IncrementalHoareTripleChecker+Invalid, 75605 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9590 mSolverCounterUnsat, 757 mSDtfsCounter, 66015 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6289 GetRequests, 1218 SyntacticMatches, 118 SemanticMatches, 4953 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204131 ImplicationChecksByTransitivity, 160.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1824occurred in iteration=48, InterpolantAutomatonStates: 3968, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 50 MinimizatonAttempts, 24455 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 61.6s InterpolantComputationTime, 2533 NumberOfCodeBlocks, 2533 NumberOfCodeBlocksAsserted, 171 NumberOfCheckSat, 3629 ConstructedInterpolants, 0 QuantifiedInterpolants, 82588 SizeOfPredicates, 423 NumberOfNonLiveVariables, 2064 ConjunctsInSsa, 934 ConjunctsInUnsatCore, 144 InterpolantComputations, 3 PerfectInterpolantSequences, 47/1929 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-18 16:51:28,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...