/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/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:54:20,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:54:20,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:54:20,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 14:54:20,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 14:54:20,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 14:54:20,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 14:54:20,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 14:54:20,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 14:54:20,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 14:54:20,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 14:54:20,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 14:54:20,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 14:54:20,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 14:54:20,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 14:54:20,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 14:54:20,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 14:54:20,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 14:54:20,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 14:54:20,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 14:54:20,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 14:54:20,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 14:54:20,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 14:54:20,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 14:54:20,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 14:54:20,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 14:54:20,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 14:54:20,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 14:54:20,554 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 14:54:20,602 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:54:20,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:54:20,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:54:20,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:54:20,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:54:20,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:54:20,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:54:20,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:54:20,605 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:54:20,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:54:20,605 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:54:20,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:54:20,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:54:20,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:54:20,607 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:54:20,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:54:20,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:54:20,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:54:20,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:54:20,808 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:54:20,810 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:54:20,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl [2022-01-18 14:54:20,811 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2022-01-18 14:54:20,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:54:20,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:54:20,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:54:20,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:54:20,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:54:20,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,856 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:54:20,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:54:20,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:54:20,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:54:20,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:54:20,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:54:20,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:54:20,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:54:20,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:54:20,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/1) ... [2022-01-18 14:54:20,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:54:20,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:20,889 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 14:54:20,897 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 14:54:20,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:54:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:54:20,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:54:20,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:54:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:54:20,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:54:20,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:54:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:54:20,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:54:20,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 14:54:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 14:54:20,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 14:54:20,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 14:54:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 14:54:20,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 14:54:20,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-01-18 14:54:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-01-18 14:54:20,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-01-18 14:54:20,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-01-18 14:54:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-01-18 14:54:20,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-01-18 14:54:20,924 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 14:54:20,956 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:54:20,957 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:54:21,021 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:54:21,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:54:21,032 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-18 14:54:21,032 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 14:54:21,032 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 14:54:21,033 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-01-18 14:54:21,033 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2022-01-18 14:54:21,033 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2022-01-18 14:54:21,033 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2022-01-18 14:54:21,034 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:54:21 BoogieIcfgContainer [2022-01-18 14:54:21,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:54:21,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:54:21,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:54:21,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:54:21,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:54:20" (1/2) ... [2022-01-18 14:54:21,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395b7e23 and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:54:21, skipping insertion in model container [2022-01-18 14:54:21,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:54:21" (2/2) ... [2022-01-18 14:54:21,039 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2022-01-18 14:54:21,042 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:54:21,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:54:21,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:54:21,042 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:54:21,070 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-01-18 14:54:21,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:54:21,102 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 14:54:21,102 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-01-18 14:54:21,108 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2022-01-18 14:54:21,200 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:54:21,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:21,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:21,217 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash -931305045, now seen corresponding path program 1 times [2022-01-18 14:54:21,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:21,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971210646] [2022-01-18 14:54:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:21,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:21,321 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 14:54:21,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:21,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971210646] [2022-01-18 14:54:21,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971210646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:54:21,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:54:21,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:54:21,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850417361] [2022-01-18 14:54:21,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:54:21,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:54:21,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:21,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:54:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:54:21,348 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 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 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:21,416 INFO L93 Difference]: Finished difference Result 352 states and 1926 transitions. [2022-01-18 14:54:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:54:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:54:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:21,428 INFO L225 Difference]: With dead ends: 352 [2022-01-18 14:54:21,428 INFO L226 Difference]: Without dead ends: 319 [2022-01-18 14:54:21,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:54:21,431 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:21,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:54:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-18 14:54:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-01-18 14:54:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 5.49685534591195) internal successors, (1748), 318 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 1748 transitions. [2022-01-18 14:54:21,517 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 1748 transitions. Word has length 21 [2022-01-18 14:54:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 1748 transitions. [2022-01-18 14:54:21,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 1748 transitions. [2022-01-18 14:54:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:54:21,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:21,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:21,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:54:21,522 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash -976021450, now seen corresponding path program 1 times [2022-01-18 14:54:21,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114113736] [2022-01-18 14:54:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:21,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:54:21,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114113736] [2022-01-18 14:54:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114113736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:54:21,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:54:21,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:54:21,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409330305] [2022-01-18 14:54:21,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:54:21,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:54:21,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:21,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:54:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:54:21,555 INFO L87 Difference]: Start difference. First operand 319 states and 1748 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:21,591 INFO L93 Difference]: Finished difference Result 628 states and 3476 transitions. [2022-01-18 14:54:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:54:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 14:54:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:21,596 INFO L225 Difference]: With dead ends: 628 [2022-01-18 14:54:21,596 INFO L226 Difference]: Without dead ends: 541 [2022-01-18 14:54:21,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:54:21,597 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:21,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:54:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-18 14:54:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2022-01-18 14:54:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 5.587037037037037) internal successors, (3017), 540 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 3017 transitions. [2022-01-18 14:54:21,622 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 3017 transitions. Word has length 22 [2022-01-18 14:54:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:21,623 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 3017 transitions. [2022-01-18 14:54:21,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 3017 transitions. [2022-01-18 14:54:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:54:21,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:21,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:21,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 14:54:21,627 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:21,630 INFO L85 PathProgramCache]: Analyzing trace with hash 93496637, now seen corresponding path program 1 times [2022-01-18 14:54:21,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:21,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875668964] [2022-01-18 14:54:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:21,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:21,672 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 14:54:21,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875668964] [2022-01-18 14:54:21,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875668964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:54:21,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:54:21,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:54:21,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819871012] [2022-01-18 14:54:21,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:54:21,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:54:21,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:54:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:54:21,674 INFO L87 Difference]: Start difference. First operand 541 states and 3017 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:21,725 INFO L93 Difference]: Finished difference Result 1078 states and 6030 transitions. [2022-01-18 14:54:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:54:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:54:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:21,733 INFO L225 Difference]: With dead ends: 1078 [2022-01-18 14:54:21,733 INFO L226 Difference]: Without dead ends: 859 [2022-01-18 14:54:21,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:54:21,739 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:21,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:54:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-18 14:54:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2022-01-18 14:54:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 5.6678321678321675) internal successors, (4863), 858 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2022-01-18 14:54:21,775 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2022-01-18 14:54:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:21,775 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2022-01-18 14:54:21,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2022-01-18 14:54:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:54:21,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:21,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:21,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 14:54:21,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1806147054, now seen corresponding path program 1 times [2022-01-18 14:54:21,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:21,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836357437] [2022-01-18 14:54:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:21,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:54:21,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:21,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836357437] [2022-01-18 14:54:21,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836357437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:21,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360121732] [2022-01-18 14:54:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:21,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:21,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:21,848 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 14:54:21,849 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 14:54:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:54:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:54:22,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:54:22,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360121732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:22,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:22,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 14:54:22,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413581474] [2022-01-18 14:54:22,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:22,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:54:22,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:54:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:54:22,075 INFO L87 Difference]: Start difference. First operand 859 states and 4863 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:22,228 INFO L93 Difference]: Finished difference Result 1936 states and 10970 transitions. [2022-01-18 14:54:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:54:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:54:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:22,235 INFO L225 Difference]: With dead ends: 1936 [2022-01-18 14:54:22,235 INFO L226 Difference]: Without dead ends: 922 [2022-01-18 14:54:22,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:22,238 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 64 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:22,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 103 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-18 14:54:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 610. [2022-01-18 14:54:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 5.600985221674877) internal successors, (3411), 609 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 3411 transitions. [2022-01-18 14:54:22,259 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 3411 transitions. Word has length 24 [2022-01-18 14:54:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 3411 transitions. [2022-01-18 14:54:22,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 3411 transitions. [2022-01-18 14:54:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:54:22,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:22,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:22,287 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 14:54:22,479 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 14:54:22,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash 860655352, now seen corresponding path program 1 times [2022-01-18 14:54:22,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559546376] [2022-01-18 14:54:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:22,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:54:22,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559546376] [2022-01-18 14:54:22,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559546376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350698219] [2022-01-18 14:54:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:22,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:22,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:22,521 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 14:54:22,522 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 14:54:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:54:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:54:22,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:54:22,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350698219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:22,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:22,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 14:54:22,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27360405] [2022-01-18 14:54:22,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:22,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:54:22,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:54:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:54:22,663 INFO L87 Difference]: Start difference. First operand 610 states and 3411 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:22,788 INFO L93 Difference]: Finished difference Result 2023 states and 11454 transitions. [2022-01-18 14:54:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:54:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:54:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:22,797 INFO L225 Difference]: With dead ends: 2023 [2022-01-18 14:54:22,798 INFO L226 Difference]: Without dead ends: 1163 [2022-01-18 14:54:22,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:22,798 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:22,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 71 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-01-18 14:54:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2022-01-18 14:54:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 5.699655765920826) internal successors, (6623), 1162 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 6623 transitions. [2022-01-18 14:54:22,836 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 6623 transitions. Word has length 24 [2022-01-18 14:54:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:22,836 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 6623 transitions. [2022-01-18 14:54:22,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 6623 transitions. [2022-01-18 14:54:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:54:22,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:22,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:22,858 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 14:54:23,055 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 14:54:23,056 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash -103790194, now seen corresponding path program 1 times [2022-01-18 14:54:23,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:23,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596566199] [2022-01-18 14:54:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:23,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:23,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:23,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596566199] [2022-01-18 14:54:23,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596566199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:23,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692007851] [2022-01-18 14:54:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:23,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:23,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:23,113 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 14:54:23,114 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 14:54:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:54:23,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:23,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:23,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692007851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:23,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:23,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-01-18 14:54:23,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230480111] [2022-01-18 14:54:23,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:23,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:54:23,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:23,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:54:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:54:23,245 INFO L87 Difference]: Start difference. First operand 1163 states and 6623 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:23,316 INFO L93 Difference]: Finished difference Result 1806 states and 10329 transitions. [2022-01-18 14:54:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:54:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:54:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:23,325 INFO L225 Difference]: With dead ends: 1806 [2022-01-18 14:54:23,325 INFO L226 Difference]: Without dead ends: 1298 [2022-01-18 14:54:23,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:54:23,326 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:23,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:54:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-01-18 14:54:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 992. [2022-01-18 14:54:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 5.702320887991927) internal successors, (5651), 991 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 5651 transitions. [2022-01-18 14:54:23,361 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 5651 transitions. Word has length 26 [2022-01-18 14:54:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:23,361 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 5651 transitions. [2022-01-18 14:54:23,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 5651 transitions. [2022-01-18 14:54:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:54:23,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:23,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:23,382 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 14:54:23,580 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 14:54:23,581 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1915665608, now seen corresponding path program 1 times [2022-01-18 14:54:23,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:23,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422722084] [2022-01-18 14:54:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:23,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:23,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422722084] [2022-01-18 14:54:23,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422722084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411780543] [2022-01-18 14:54:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:23,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:23,621 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 14:54:23,622 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 14:54:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:54:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:23,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:23,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411780543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:23,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:23,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-01-18 14:54:23,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138578051] [2022-01-18 14:54:23,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:23,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:54:23,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:54:23,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:54:23,738 INFO L87 Difference]: Start difference. First operand 992 states and 5651 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:23,785 INFO L93 Difference]: Finished difference Result 1941 states and 11157 transitions. [2022-01-18 14:54:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:54:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:54:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:23,801 INFO L225 Difference]: With dead ends: 1941 [2022-01-18 14:54:23,801 INFO L226 Difference]: Without dead ends: 1460 [2022-01-18 14:54:23,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:54:23,803 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:23,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 35 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:54:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-01-18 14:54:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2022-01-18 14:54:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.748457847840987) internal successors, (8387), 1459 states have internal predecessors, (8387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2022-01-18 14:54:23,847 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 26 [2022-01-18 14:54:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:23,848 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2022-01-18 14:54:23,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2022-01-18 14:54:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:54:23,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:23,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:23,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-18 14:54:24,067 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 14:54:24,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1029298811, now seen corresponding path program 1 times [2022-01-18 14:54:24,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160539029] [2022-01-18 14:54:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:24,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:24,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:24,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160539029] [2022-01-18 14:54:24,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160539029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:24,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742417777] [2022-01-18 14:54:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:24,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:24,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:24,106 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 14:54:24,107 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 14:54:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:24,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:24,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:24,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742417777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:24,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:24,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 6 [2022-01-18 14:54:24,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589869073] [2022-01-18 14:54:24,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:54:24,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:54:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:54:24,319 INFO L87 Difference]: Start difference. First operand 1460 states and 8387 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:24,521 INFO L93 Difference]: Finished difference Result 6508 states and 37469 transitions. [2022-01-18 14:54:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:54:24,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:54:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:24,554 INFO L225 Difference]: With dead ends: 6508 [2022-01-18 14:54:24,554 INFO L226 Difference]: Without dead ends: 5595 [2022-01-18 14:54:24,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:54:24,555 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 93 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:24,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 148 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5595 states. [2022-01-18 14:54:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5595 to 3403. [2022-01-18 14:54:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3402 states have (on average 6.304526748971194) internal successors, (21448), 3402 states have internal predecessors, (21448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 21448 transitions. [2022-01-18 14:54:24,720 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 21448 transitions. Word has length 27 [2022-01-18 14:54:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:24,721 INFO L470 AbstractCegarLoop]: Abstraction has 3403 states and 21448 transitions. [2022-01-18 14:54:24,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 21448 transitions. [2022-01-18 14:54:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:54:24,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:24,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:24,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 14:54:24,955 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 14:54:24,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 460516603, now seen corresponding path program 2 times [2022-01-18 14:54:24,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:24,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2678225] [2022-01-18 14:54:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:24,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:54:24,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:24,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2678225] [2022-01-18 14:54:24,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2678225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:24,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797787158] [2022-01-18 14:54:24,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:54:24,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:24,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:24,989 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 14:54:24,989 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 14:54:25,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:54:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:25,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:25,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797787158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:25,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:25,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 6 [2022-01-18 14:54:25,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145547240] [2022-01-18 14:54:25,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:25,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:54:25,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:54:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:54:25,169 INFO L87 Difference]: Start difference. First operand 3403 states and 21448 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:25,421 INFO L93 Difference]: Finished difference Result 11115 states and 69290 transitions. [2022-01-18 14:54:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:54:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:54:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:25,471 INFO L225 Difference]: With dead ends: 11115 [2022-01-18 14:54:25,472 INFO L226 Difference]: Without dead ends: 10118 [2022-01-18 14:54:25,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:54:25,472 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 98 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:25,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 159 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10118 states. [2022-01-18 14:54:25,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10118 to 6709. [2022-01-18 14:54:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 6.731067382230173) internal successors, (45152), 6708 states have internal predecessors, (45152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45152 transitions. [2022-01-18 14:54:25,725 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45152 transitions. Word has length 27 [2022-01-18 14:54:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:25,725 INFO L470 AbstractCegarLoop]: Abstraction has 6709 states and 45152 transitions. [2022-01-18 14:54:25,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45152 transitions. [2022-01-18 14:54:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:54:25,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:25,747 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:25,766 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 14:54:25,963 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 14:54:25,964 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash -90777990, now seen corresponding path program 3 times [2022-01-18 14:54:25,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:25,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375268720] [2022-01-18 14:54:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:25,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:25,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:25,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375268720] [2022-01-18 14:54:25,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375268720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:25,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321782993] [2022-01-18 14:54:25,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:54:25,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:25,996 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 14:54:25,997 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 14:54:26,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:54:26,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:26,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:26,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:26,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321782993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:26,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:26,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:54:26,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083160874] [2022-01-18 14:54:26,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:26,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:26,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:26,213 INFO L87 Difference]: Start difference. First operand 6709 states and 45152 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:26,448 INFO L93 Difference]: Finished difference Result 9291 states and 60293 transitions. [2022-01-18 14:54:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:54:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:26,489 INFO L225 Difference]: With dead ends: 9291 [2022-01-18 14:54:26,490 INFO L226 Difference]: Without dead ends: 7946 [2022-01-18 14:54:26,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:26,490 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:26,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 125 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2022-01-18 14:54:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 6226. [2022-01-18 14:54:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.658473895582329) internal successors, (41449), 6225 states have internal predecessors, (41449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41449 transitions. [2022-01-18 14:54:26,729 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41449 transitions. Word has length 28 [2022-01-18 14:54:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:26,730 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 41449 transitions. [2022-01-18 14:54:26,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41449 transitions. [2022-01-18 14:54:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:54:26,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:26,749 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:26,767 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 14:54:26,963 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 14:54:26,963 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash 292327756, now seen corresponding path program 4 times [2022-01-18 14:54:26,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:26,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949901640] [2022-01-18 14:54:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:26,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:27,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:27,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949901640] [2022-01-18 14:54:27,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949901640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:27,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057216301] [2022-01-18 14:54:27,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:54:27,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:27,057 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 14:54:27,058 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 14:54:27,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:54:27,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:27,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:27,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:27,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057216301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:27,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:27,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:54:27,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955900496] [2022-01-18 14:54:27,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:27,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:27,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:27,218 INFO L87 Difference]: Start difference. First operand 6226 states and 41449 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:27,392 INFO L93 Difference]: Finished difference Result 9667 states and 62399 transitions. [2022-01-18 14:54:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:54:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:27,422 INFO L225 Difference]: With dead ends: 9667 [2022-01-18 14:54:27,422 INFO L226 Difference]: Without dead ends: 7372 [2022-01-18 14:54:27,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:27,423 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:27,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 131 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2022-01-18 14:54:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 6226. [2022-01-18 14:54:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.566586345381526) internal successors, (40877), 6225 states have internal predecessors, (40877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40877 transitions. [2022-01-18 14:54:27,655 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40877 transitions. Word has length 28 [2022-01-18 14:54:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:27,655 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 40877 transitions. [2022-01-18 14:54:27,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40877 transitions. [2022-01-18 14:54:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:54:27,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:27,683 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:27,701 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 14:54:27,891 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 14:54:27,892 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1127701574, now seen corresponding path program 5 times [2022-01-18 14:54:27,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277971841] [2022-01-18 14:54:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:27,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:27,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:27,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277971841] [2022-01-18 14:54:27,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277971841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:27,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299384448] [2022-01-18 14:54:27,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:54:27,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:27,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:27,919 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 14:54:27,920 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 14:54:27,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:54:27,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:28,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:54:28,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299384448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:28,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:28,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:54:28,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875779004] [2022-01-18 14:54:28,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:28,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:28,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:28,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:28,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:28,062 INFO L87 Difference]: Start difference. First operand 6226 states and 40877 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:28,237 INFO L93 Difference]: Finished difference Result 9093 states and 58145 transitions. [2022-01-18 14:54:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:54:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:54:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:28,268 INFO L225 Difference]: With dead ends: 9093 [2022-01-18 14:54:28,269 INFO L226 Difference]: Without dead ends: 7656 [2022-01-18 14:54:28,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:28,269 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:28,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 92 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2022-01-18 14:54:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2022-01-18 14:54:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 6.428268176189634) internal successors, (36339), 5653 states have internal predecessors, (36339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36339 transitions. [2022-01-18 14:54:28,593 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36339 transitions. Word has length 28 [2022-01-18 14:54:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:28,594 INFO L470 AbstractCegarLoop]: Abstraction has 5654 states and 36339 transitions. [2022-01-18 14:54:28,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36339 transitions. [2022-01-18 14:54:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:54:28,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:28,611 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:28,627 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 14:54:28,819 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 14:54:28,819 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1808352738, now seen corresponding path program 6 times [2022-01-18 14:54:28,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:28,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976834874] [2022-01-18 14:54:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:28,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:28,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:28,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976834874] [2022-01-18 14:54:28,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976834874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:28,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104307723] [2022-01-18 14:54:28,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:54:28,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:28,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:28,844 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 14:54:28,871 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 14:54:28,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:54:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:28,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:28,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104307723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:28,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:28,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:54:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987407800] [2022-01-18 14:54:28,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:28,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:28,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:28,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:28,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:28,981 INFO L87 Difference]: Start difference. First operand 5654 states and 36339 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:29,119 INFO L93 Difference]: Finished difference Result 7946 states and 50780 transitions. [2022-01-18 14:54:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:29,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:54:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:29,143 INFO L225 Difference]: With dead ends: 7946 [2022-01-18 14:54:29,143 INFO L226 Difference]: Without dead ends: 6800 [2022-01-18 14:54:29,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:29,144 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:29,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 96 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2022-01-18 14:54:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 5368. [2022-01-18 14:54:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 6.374697223774921) internal successors, (34213), 5367 states have internal predecessors, (34213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34213 transitions. [2022-01-18 14:54:29,336 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34213 transitions. Word has length 28 [2022-01-18 14:54:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:29,336 INFO L470 AbstractCegarLoop]: Abstraction has 5368 states and 34213 transitions. [2022-01-18 14:54:29,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34213 transitions. [2022-01-18 14:54:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:54:29,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:29,350 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:29,367 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 14:54:29,567 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 14:54:29,567 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1475497308, now seen corresponding path program 7 times [2022-01-18 14:54:29,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:29,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639513149] [2022-01-18 14:54:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:29,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:29,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639513149] [2022-01-18 14:54:29,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639513149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739814911] [2022-01-18 14:54:29,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:54:29,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:29,591 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 14:54:29,592 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 14:54:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:29,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:29,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:29,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:54:29,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739814911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:29,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:29,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:54:29,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285128343] [2022-01-18 14:54:29,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:29,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:29,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:29,723 INFO L87 Difference]: Start difference. First operand 5368 states and 34213 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:29,885 INFO L93 Difference]: Finished difference Result 7087 states and 45258 transitions. [2022-01-18 14:54:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:54:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:29,909 INFO L225 Difference]: With dead ends: 7087 [2022-01-18 14:54:29,909 INFO L226 Difference]: Without dead ends: 6512 [2022-01-18 14:54:29,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:29,910 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:29,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 125 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2022-01-18 14:54:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2022-01-18 14:54:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 6.380367065162485) internal successors, (37893), 5939 states have internal predecessors, (37893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37893 transitions. [2022-01-18 14:54:30,152 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37893 transitions. Word has length 28 [2022-01-18 14:54:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:30,152 INFO L470 AbstractCegarLoop]: Abstraction has 5940 states and 37893 transitions. [2022-01-18 14:54:30,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37893 transitions. [2022-01-18 14:54:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:54:30,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:30,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:30,187 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 14:54:30,372 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 14:54:30,372 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1880877169, now seen corresponding path program 8 times [2022-01-18 14:54:30,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:30,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423142717] [2022-01-18 14:54:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:30,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:30,409 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 14:54:30,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423142717] [2022-01-18 14:54:30,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423142717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418781334] [2022-01-18 14:54:30,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:54:30,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:30,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:30,410 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 14:54:30,411 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 14:54:30,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:54:30,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:30,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:54:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:30,609 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 14:54:30,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:30,680 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 14:54:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418781334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:30,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:54:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374378281] [2022-01-18 14:54:30,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:54:30,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:54:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:54:30,682 INFO L87 Difference]: Start difference. First operand 5940 states and 37893 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:30,911 INFO L93 Difference]: Finished difference Result 11496 states and 73614 transitions. [2022-01-18 14:54:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:30,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:54:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:30,959 INFO L225 Difference]: With dead ends: 11496 [2022-01-18 14:54:30,960 INFO L226 Difference]: Without dead ends: 11208 [2022-01-18 14:54:30,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:54:30,960 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:30,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 123 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2022-01-18 14:54:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 9196. [2022-01-18 14:54:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 9195 states have (on average 6.621098423056009) internal successors, (60881), 9195 states have internal predecessors, (60881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 60881 transitions. [2022-01-18 14:54:31,288 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 60881 transitions. Word has length 29 [2022-01-18 14:54:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 9196 states and 60881 transitions. [2022-01-18 14:54:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 60881 transitions. [2022-01-18 14:54:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:54:31,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:31,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:31,327 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 14:54:31,513 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 14:54:31,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash -847814829, now seen corresponding path program 9 times [2022-01-18 14:54:31,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:31,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726865205] [2022-01-18 14:54:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:31,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:54:31,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:31,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726865205] [2022-01-18 14:54:31,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726865205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:31,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918272861] [2022-01-18 14:54:31,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:54:31,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:31,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:31,643 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 14:54:31,644 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 14:54:31,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:54:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:31,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:54:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918272861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:31,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:31,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-01-18 14:54:31,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482027156] [2022-01-18 14:54:31,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:31,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:31,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:31,830 INFO L87 Difference]: Start difference. First operand 9196 states and 60881 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:32,305 INFO L93 Difference]: Finished difference Result 25018 states and 159726 transitions. [2022-01-18 14:54:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:54:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:54:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:32,513 INFO L225 Difference]: With dead ends: 25018 [2022-01-18 14:54:32,513 INFO L226 Difference]: Without dead ends: 22353 [2022-01-18 14:54:32,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:54:32,515 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 111 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:32,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 299 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22353 states. [2022-01-18 14:54:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22353 to 13742. [2022-01-18 14:54:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13742 states, 13741 states have (on average 6.9258423695509785) internal successors, (95168), 13741 states have internal predecessors, (95168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13742 states to 13742 states and 95168 transitions. [2022-01-18 14:54:33,044 INFO L78 Accepts]: Start accepts. Automaton has 13742 states and 95168 transitions. Word has length 29 [2022-01-18 14:54:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:33,044 INFO L470 AbstractCegarLoop]: Abstraction has 13742 states and 95168 transitions. [2022-01-18 14:54:33,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 13742 states and 95168 transitions. [2022-01-18 14:54:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:54:33,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:33,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:33,100 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 14:54:33,285 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 14:54:33,286 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:33,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1109462170, now seen corresponding path program 10 times [2022-01-18 14:54:33,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:33,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847447678] [2022-01-18 14:54:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:33,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:33,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:33,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847447678] [2022-01-18 14:54:33,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847447678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:33,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676264111] [2022-01-18 14:54:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:54:33,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:33,344 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 14:54:33,345 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 14:54:33,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:54:33,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:33,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:33,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676264111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:33,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:33,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:54:33,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834277131] [2022-01-18 14:54:33,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:33,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:33,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:33,623 INFO L87 Difference]: Start difference. First operand 13742 states and 95168 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:33,889 INFO L93 Difference]: Finished difference Result 22024 states and 145091 transitions. [2022-01-18 14:54:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:54:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:33,958 INFO L225 Difference]: With dead ends: 22024 [2022-01-18 14:54:33,958 INFO L226 Difference]: Without dead ends: 17242 [2022-01-18 14:54:33,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:33,959 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 80 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:33,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 124 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17242 states. [2022-01-18 14:54:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17242 to 12713. [2022-01-18 14:54:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12713 states, 12712 states have (on average 6.821821900566394) internal successors, (86719), 12712 states have internal predecessors, (86719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12713 states to 12713 states and 86719 transitions. [2022-01-18 14:54:34,549 INFO L78 Accepts]: Start accepts. Automaton has 12713 states and 86719 transitions. Word has length 30 [2022-01-18 14:54:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:34,549 INFO L470 AbstractCegarLoop]: Abstraction has 12713 states and 86719 transitions. [2022-01-18 14:54:34,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 12713 states and 86719 transitions. [2022-01-18 14:54:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:54:34,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:34,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:34,600 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 14:54:34,785 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 14:54:34,786 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash 465673390, now seen corresponding path program 11 times [2022-01-18 14:54:34,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:34,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515755690] [2022-01-18 14:54:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:34,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:34,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515755690] [2022-01-18 14:54:34,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515755690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071640533] [2022-01-18 14:54:34,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:54:34,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:34,810 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 14:54:34,811 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 14:54:34,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:54:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:34,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:34,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:34,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071640533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:34,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:34,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:54:34,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008343596] [2022-01-18 14:54:34,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:34,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:34,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:34,984 INFO L87 Difference]: Start difference. First operand 12713 states and 86719 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:35,284 INFO L93 Difference]: Finished difference Result 24284 states and 158204 transitions. [2022-01-18 14:54:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:35,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:54:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:35,349 INFO L225 Difference]: With dead ends: 24284 [2022-01-18 14:54:35,349 INFO L226 Difference]: Without dead ends: 15901 [2022-01-18 14:54:35,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:35,350 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 87 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:35,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 118 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15901 states. [2022-01-18 14:54:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15901 to 12713. [2022-01-18 14:54:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12713 states, 12712 states have (on average 6.732772183763373) internal successors, (85587), 12712 states have internal predecessors, (85587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12713 states to 12713 states and 85587 transitions. [2022-01-18 14:54:35,893 INFO L78 Accepts]: Start accepts. Automaton has 12713 states and 85587 transitions. Word has length 30 [2022-01-18 14:54:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:35,893 INFO L470 AbstractCegarLoop]: Abstraction has 12713 states and 85587 transitions. [2022-01-18 14:54:35,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 12713 states and 85587 transitions. [2022-01-18 14:54:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:54:35,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:35,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:35,947 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 14:54:36,129 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 14:54:36,129 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2003086426, now seen corresponding path program 12 times [2022-01-18 14:54:36,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:36,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679955721] [2022-01-18 14:54:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:36,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:36,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:36,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679955721] [2022-01-18 14:54:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679955721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:36,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29105949] [2022-01-18 14:54:36,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:54:36,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:36,156 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 14:54:36,157 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 14:54:36,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:54:36,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:36,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:54:36,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29105949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:36,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:36,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:54:36,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018293234] [2022-01-18 14:54:36,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:36,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:36,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:36,311 INFO L87 Difference]: Start difference. First operand 12713 states and 85587 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:36,715 INFO L93 Difference]: Finished difference Result 22021 states and 143389 transitions. [2022-01-18 14:54:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:54:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:54:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:36,776 INFO L225 Difference]: With dead ends: 22021 [2022-01-18 14:54:36,777 INFO L226 Difference]: Without dead ends: 15543 [2022-01-18 14:54:36,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:36,777 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:36,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 122 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15543 states. [2022-01-18 14:54:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15543 to 11581. [2022-01-18 14:54:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11581 states, 11580 states have (on average 6.59853195164076) internal successors, (76411), 11580 states have internal predecessors, (76411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11581 states to 11581 states and 76411 transitions. [2022-01-18 14:54:37,106 INFO L78 Accepts]: Start accepts. Automaton has 11581 states and 76411 transitions. Word has length 30 [2022-01-18 14:54:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:37,106 INFO L470 AbstractCegarLoop]: Abstraction has 11581 states and 76411 transitions. [2022-01-18 14:54:37,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11581 states and 76411 transitions. [2022-01-18 14:54:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:54:37,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:37,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:37,151 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 14:54:37,347 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 14:54:37,347 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash 415691786, now seen corresponding path program 13 times [2022-01-18 14:54:37,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:37,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058348027] [2022-01-18 14:54:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:37,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:37,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058348027] [2022-01-18 14:54:37,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058348027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242188538] [2022-01-18 14:54:37,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:54:37,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:37,374 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 14:54:37,375 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 14:54:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:37,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:37,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242188538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:37,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:37,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:54:37,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940387450] [2022-01-18 14:54:37,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:37,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:37,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:37,527 INFO L87 Difference]: Start difference. First operand 11581 states and 76411 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:37,807 INFO L93 Difference]: Finished difference Result 18164 states and 118652 transitions. [2022-01-18 14:54:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:37,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:54:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:37,870 INFO L225 Difference]: With dead ends: 18164 [2022-01-18 14:54:37,871 INFO L226 Difference]: Without dead ends: 14769 [2022-01-18 14:54:37,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:37,871 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:37,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 128 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14769 states. [2022-01-18 14:54:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14769 to 11015. [2022-01-18 14:54:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11015 states, 11014 states have (on average 6.546758670782641) internal successors, (72106), 11014 states have internal predecessors, (72106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11015 states to 11015 states and 72106 transitions. [2022-01-18 14:54:38,217 INFO L78 Accepts]: Start accepts. Automaton has 11015 states and 72106 transitions. Word has length 30 [2022-01-18 14:54:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:38,217 INFO L470 AbstractCegarLoop]: Abstraction has 11015 states and 72106 transitions. [2022-01-18 14:54:38,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11015 states and 72106 transitions. [2022-01-18 14:54:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:54:38,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:38,246 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:38,261 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 14:54:38,459 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 14:54:38,459 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 477731400, now seen corresponding path program 14 times [2022-01-18 14:54:38,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:38,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963512219] [2022-01-18 14:54:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:38,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:38,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:38,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963512219] [2022-01-18 14:54:38,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963512219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:38,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554146053] [2022-01-18 14:54:38,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:54:38,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:38,490 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 14:54:38,491 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 14:54:38,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:54:38,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:38,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:54:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:38,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:38,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554146053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:38,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:38,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:54:38,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450671334] [2022-01-18 14:54:38,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:38,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:54:38,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:54:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:54:38,634 INFO L87 Difference]: Start difference. First operand 11015 states and 72106 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:38,881 INFO L93 Difference]: Finished difference Result 16004 states and 104321 transitions. [2022-01-18 14:54:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:54:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:54:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:38,937 INFO L225 Difference]: With dead ends: 16004 [2022-01-18 14:54:38,937 INFO L226 Difference]: Without dead ends: 13279 [2022-01-18 14:54:38,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:38,939 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:38,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 119 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:54:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2022-01-18 14:54:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 12147. [2022-01-18 14:54:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12147 states, 12146 states have (on average 6.552280586201219) internal successors, (79584), 12146 states have internal predecessors, (79584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12147 states to 12147 states and 79584 transitions. [2022-01-18 14:54:39,281 INFO L78 Accepts]: Start accepts. Automaton has 12147 states and 79584 transitions. Word has length 30 [2022-01-18 14:54:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:39,281 INFO L470 AbstractCegarLoop]: Abstraction has 12147 states and 79584 transitions. [2022-01-18 14:54:39,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 12147 states and 79584 transitions. [2022-01-18 14:54:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:54:39,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:39,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:39,329 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 14:54:39,527 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 14:54:39,527 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2135980253, now seen corresponding path program 15 times [2022-01-18 14:54:39,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:39,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108728772] [2022-01-18 14:54:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:39,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:54:39,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:39,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108728772] [2022-01-18 14:54:39,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108728772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:39,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812360076] [2022-01-18 14:54:39,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:54:39,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:39,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:39,561 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 14:54:39,562 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 14:54:39,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:54:39,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:39,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:54:39,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:39,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812360076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:39,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:39,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-18 14:54:39,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645794355] [2022-01-18 14:54:39,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:39,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:54:39,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:54:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:39,823 INFO L87 Difference]: Start difference. First operand 12147 states and 79584 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:40,814 INFO L93 Difference]: Finished difference Result 42090 states and 268739 transitions. [2022-01-18 14:54:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:54:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 14:54:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:41,009 INFO L225 Difference]: With dead ends: 42090 [2022-01-18 14:54:41,009 INFO L226 Difference]: Without dead ends: 38810 [2022-01-18 14:54:41,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:54:41,010 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 166 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:41,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 665 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:54:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38810 states. [2022-01-18 14:54:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38810 to 24247. [2022-01-18 14:54:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24247 states, 24246 states have (on average 6.913552750969232) internal successors, (167626), 24246 states have internal predecessors, (167626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24247 states to 24247 states and 167626 transitions. [2022-01-18 14:54:41,918 INFO L78 Accepts]: Start accepts. Automaton has 24247 states and 167626 transitions. Word has length 31 [2022-01-18 14:54:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:41,918 INFO L470 AbstractCegarLoop]: Abstraction has 24247 states and 167626 transitions. [2022-01-18 14:54:41,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 24247 states and 167626 transitions. [2022-01-18 14:54:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:41,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:41,984 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:41,999 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 14:54:42,184 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 14:54:42,185 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1628666418, now seen corresponding path program 16 times [2022-01-18 14:54:42,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:42,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343305110] [2022-01-18 14:54:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:42,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:42,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:42,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343305110] [2022-01-18 14:54:42,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343305110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:42,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358888286] [2022-01-18 14:54:42,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:54:42,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:42,219 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 14:54:42,235 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 14:54:42,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:54:42,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:42,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:42,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:42,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358888286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:42,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:42,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:54:42,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668427148] [2022-01-18 14:54:42,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:42,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:54:42,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:54:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:42,398 INFO L87 Difference]: Start difference. First operand 24247 states and 167626 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:42,869 INFO L93 Difference]: Finished difference Result 33951 states and 226852 transitions. [2022-01-18 14:54:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:54:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:54:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:43,024 INFO L225 Difference]: With dead ends: 33951 [2022-01-18 14:54:43,024 INFO L226 Difference]: Without dead ends: 31017 [2022-01-18 14:54:43,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:43,025 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:43,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 217 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2022-01-18 14:54:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 23869. [2022-01-18 14:54:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23869 states, 23868 states have (on average 6.8552874141109434) internal successors, (163622), 23868 states have internal predecessors, (163622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23869 states to 23869 states and 163622 transitions. [2022-01-18 14:54:43,859 INFO L78 Accepts]: Start accepts. Automaton has 23869 states and 163622 transitions. Word has length 32 [2022-01-18 14:54:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:43,859 INFO L470 AbstractCegarLoop]: Abstraction has 23869 states and 163622 transitions. [2022-01-18 14:54:43,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 23869 states and 163622 transitions. [2022-01-18 14:54:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:43,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:43,929 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:43,944 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 14:54:44,130 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 14:54:44,130 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash 620042656, now seen corresponding path program 17 times [2022-01-18 14:54:44,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:44,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24640066] [2022-01-18 14:54:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:44,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:44,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24640066] [2022-01-18 14:54:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24640066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495061789] [2022-01-18 14:54:44,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:54:44,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:44,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:44,165 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 14:54:44,186 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 14:54:44,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:54:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:44,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:44,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495061789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:44,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:44,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:54:44,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678928903] [2022-01-18 14:54:44,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:44,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:54:44,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:54:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:54:44,343 INFO L87 Difference]: Start difference. First operand 23869 states and 163622 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:44,902 INFO L93 Difference]: Finished difference Result 35105 states and 233275 transitions. [2022-01-18 14:54:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:54:44,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:54:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:45,063 INFO L225 Difference]: With dead ends: 35105 [2022-01-18 14:54:45,063 INFO L226 Difference]: Without dead ends: 27952 [2022-01-18 14:54:45,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:54:45,065 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 167 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:45,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 285 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27952 states. [2022-01-18 14:54:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27952 to 21827. [2022-01-18 14:54:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21827 states, 21826 states have (on average 6.797443416109227) internal successors, (148361), 21826 states have internal predecessors, (148361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21827 states to 21827 states and 148361 transitions. [2022-01-18 14:54:45,812 INFO L78 Accepts]: Start accepts. Automaton has 21827 states and 148361 transitions. Word has length 32 [2022-01-18 14:54:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:45,812 INFO L470 AbstractCegarLoop]: Abstraction has 21827 states and 148361 transitions. [2022-01-18 14:54:45,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:45,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21827 states and 148361 transitions. [2022-01-18 14:54:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:45,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:45,874 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:45,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 14:54:46,087 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 14:54:46,087 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:46,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:46,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1356406896, now seen corresponding path program 18 times [2022-01-18 14:54:46,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:46,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031237058] [2022-01-18 14:54:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:46,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:54:46,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031237058] [2022-01-18 14:54:46,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031237058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300118861] [2022-01-18 14:54:46,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:54:46,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:46,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:46,125 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 14:54:46,126 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 14:54:46,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:54:46,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:46,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 14:54:46,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300118861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:46,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:46,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:54:46,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888691829] [2022-01-18 14:54:46,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:46,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:54:46,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:54:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:54:46,316 INFO L87 Difference]: Start difference. First operand 21827 states and 148361 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 14:54:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:47,125 INFO L93 Difference]: Finished difference Result 39186 states and 256137 transitions. [2022-01-18 14:54:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:54:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 32 [2022-01-18 14:54:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:47,279 INFO L225 Difference]: With dead ends: 39186 [2022-01-18 14:54:47,279 INFO L226 Difference]: Without dead ends: 33561 [2022-01-18 14:54:47,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:54:47,280 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 135 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:47,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 236 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33561 states. [2022-01-18 14:54:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33561 to 21317. [2022-01-18 14:54:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21317 states, 21316 states have (on average 6.68540063801839) internal successors, (142506), 21316 states have internal predecessors, (142506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21317 states to 21317 states and 142506 transitions. [2022-01-18 14:54:48,304 INFO L78 Accepts]: Start accepts. Automaton has 21317 states and 142506 transitions. Word has length 32 [2022-01-18 14:54:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:48,304 INFO L470 AbstractCegarLoop]: Abstraction has 21317 states and 142506 transitions. [2022-01-18 14:54:48,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 14:54:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21317 states and 142506 transitions. [2022-01-18 14:54:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:48,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:48,396 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:48,411 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 14:54:48,597 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 14:54:48,597 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2037058060, now seen corresponding path program 19 times [2022-01-18 14:54:48,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:48,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258310742] [2022-01-18 14:54:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:48,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:48,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:48,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258310742] [2022-01-18 14:54:48,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258310742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:48,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248973218] [2022-01-18 14:54:48,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:54:48,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:48,631 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 14:54:48,633 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 14:54:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:48,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:48,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:48,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:54:48,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248973218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:48,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:48,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:54:48,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357767053] [2022-01-18 14:54:48,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:48,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:54:48,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:54:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:54:48,826 INFO L87 Difference]: Start difference. First operand 21317 states and 142506 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 14:54:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:49,392 INFO L93 Difference]: Finished difference Result 35611 states and 232490 transitions. [2022-01-18 14:54:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:54:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 32 [2022-01-18 14:54:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:49,537 INFO L225 Difference]: With dead ends: 35611 [2022-01-18 14:54:49,537 INFO L226 Difference]: Without dead ends: 28971 [2022-01-18 14:54:49,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:54:49,538 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 108 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:49,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 218 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28971 states. [2022-01-18 14:54:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28971 to 20296. [2022-01-18 14:54:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.620645479182064) internal successors, (134366), 20295 states have internal predecessors, (134366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 134366 transitions. [2022-01-18 14:54:50,521 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 134366 transitions. Word has length 32 [2022-01-18 14:54:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:50,521 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 134366 transitions. [2022-01-18 14:54:50,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 14:54:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 134366 transitions. [2022-01-18 14:54:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:50,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:50,574 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:50,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 14:54:50,774 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 14:54:50,774 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1246791986, now seen corresponding path program 20 times [2022-01-18 14:54:50,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:50,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391379697] [2022-01-18 14:54:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:50,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:50,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:50,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391379697] [2022-01-18 14:54:50,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391379697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:50,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166950579] [2022-01-18 14:54:50,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:54:50,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:50,809 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 14:54:50,809 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 14:54:50,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:54:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:50,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:50,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166950579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:50,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:50,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:54:50,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247418580] [2022-01-18 14:54:50,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:50,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:54:50,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:50,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:54:50,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:54:50,978 INFO L87 Difference]: Start difference. First operand 20296 states and 134366 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 14:54:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:51,481 INFO L93 Difference]: Finished difference Result 30499 states and 199941 transitions. [2022-01-18 14:54:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:54:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 32 [2022-01-18 14:54:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:51,609 INFO L225 Difference]: With dead ends: 30499 [2022-01-18 14:54:51,610 INFO L226 Difference]: Without dead ends: 29476 [2022-01-18 14:54:51,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:54:51,610 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:51,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 303 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2022-01-18 14:54:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 20296. [2022-01-18 14:54:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.620645479182064) internal successors, (134366), 20295 states have internal predecessors, (134366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 134366 transitions. [2022-01-18 14:54:52,564 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 134366 transitions. Word has length 32 [2022-01-18 14:54:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:52,564 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 134366 transitions. [2022-01-18 14:54:52,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 14:54:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 134366 transitions. [2022-01-18 14:54:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:52,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:52,620 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:52,635 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 14:54:52,820 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 14:54:52,821 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:52,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1883991200, now seen corresponding path program 21 times [2022-01-18 14:54:52,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:52,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318901210] [2022-01-18 14:54:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:52,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:52,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:52,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318901210] [2022-01-18 14:54:52,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318901210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:52,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313542455] [2022-01-18 14:54:52,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:54:52,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:52,855 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 14:54:52,857 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 14:54:52,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:54:52,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:52,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:54:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 14:54:53,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 14:54:53,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313542455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:53,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:53,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 13 [2022-01-18 14:54:53,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522689704] [2022-01-18 14:54:53,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:53,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:54:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:54:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:54:53,149 INFO L87 Difference]: Start difference. First operand 20296 states and 134366 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:55,068 INFO L93 Difference]: Finished difference Result 55689 states and 355451 transitions. [2022-01-18 14:54:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 14:54:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:54:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:55,320 INFO L225 Difference]: With dead ends: 55689 [2022-01-18 14:54:55,321 INFO L226 Difference]: Without dead ends: 48821 [2022-01-18 14:54:55,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 14:54:55,321 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 550 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:55,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1036 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:54:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48821 states. [2022-01-18 14:54:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48821 to 23776. [2022-01-18 14:54:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23776 states, 23775 states have (on average 6.784269190325973) internal successors, (161296), 23775 states have internal predecessors, (161296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23776 states to 23776 states and 161296 transitions. [2022-01-18 14:54:56,568 INFO L78 Accepts]: Start accepts. Automaton has 23776 states and 161296 transitions. Word has length 32 [2022-01-18 14:54:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:56,568 INFO L470 AbstractCegarLoop]: Abstraction has 23776 states and 161296 transitions. [2022-01-18 14:54:56,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 23776 states and 161296 transitions. [2022-01-18 14:54:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:56,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:56,632 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:56,647 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 14:54:56,832 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 14:54:56,832 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash -424911306, now seen corresponding path program 22 times [2022-01-18 14:54:56,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142089053] [2022-01-18 14:54:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:56,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:56,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142089053] [2022-01-18 14:54:56,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142089053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705529702] [2022-01-18 14:54:56,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:54:56,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:56,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:56,864 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 14:54:56,865 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 14:54:56,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:54:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:56,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:54:57,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705529702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:57,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:57,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:54:57,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323567064] [2022-01-18 14:54:57,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:57,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:54:57,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:54:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:57,032 INFO L87 Difference]: Start difference. First operand 23776 states and 161296 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:54:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:57,539 INFO L93 Difference]: Finished difference Result 36270 states and 239993 transitions. [2022-01-18 14:54:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:54:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 32 [2022-01-18 14:54:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:54:57,944 INFO L225 Difference]: With dead ends: 36270 [2022-01-18 14:54:57,945 INFO L226 Difference]: Without dead ends: 32102 [2022-01-18 14:54:57,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:54:57,945 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 143 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:54:57,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 236 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:54:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32102 states. [2022-01-18 14:54:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32102 to 23776. [2022-01-18 14:54:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23776 states, 23775 states have (on average 6.759284963196635) internal successors, (160702), 23775 states have internal predecessors, (160702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:54:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23776 states to 23776 states and 160702 transitions. [2022-01-18 14:54:58,813 INFO L78 Accepts]: Start accepts. Automaton has 23776 states and 160702 transitions. Word has length 32 [2022-01-18 14:54:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:54:58,814 INFO L470 AbstractCegarLoop]: Abstraction has 23776 states and 160702 transitions. [2022-01-18 14:54:58,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:54:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 23776 states and 160702 transitions. [2022-01-18 14:54:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:54:58,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:54:58,875 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:54:58,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 14:54:59,076 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 14:54:59,076 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:54:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:54:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1105562470, now seen corresponding path program 23 times [2022-01-18 14:54:59,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:54:59,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518683954] [2022-01-18 14:54:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:54:59,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:54:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:54:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:59,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:54:59,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518683954] [2022-01-18 14:54:59,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518683954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:54:59,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254543528] [2022-01-18 14:54:59,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:54:59,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:54:59,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:54:59,106 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 14:54:59,107 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 14:54:59,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:54:59,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:54:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:54:59,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:54:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:59,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:54:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:54:59,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254543528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:54:59,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:54:59,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:54:59,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080443192] [2022-01-18 14:54:59,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:54:59,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:54:59,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:54:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:54:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:54:59,273 INFO L87 Difference]: Start difference. First operand 23776 states and 160702 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:54:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:54:59,696 INFO L93 Difference]: Finished difference Result 33889 states and 224209 transitions. [2022-01-18 14:54:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:54:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 32 [2022-01-18 14:54:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:00,072 INFO L225 Difference]: With dead ends: 33889 [2022-01-18 14:55:00,072 INFO L226 Difference]: Without dead ends: 30917 [2022-01-18 14:55:00,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:55:00,073 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 101 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:00,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 177 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:55:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30917 states. [2022-01-18 14:55:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30917 to 23182. [2022-01-18 14:55:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23182 states, 23181 states have (on average 6.685475173633579) internal successors, (154976), 23181 states have internal predecessors, (154976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23182 states to 23182 states and 154976 transitions. [2022-01-18 14:55:00,877 INFO L78 Accepts]: Start accepts. Automaton has 23182 states and 154976 transitions. Word has length 32 [2022-01-18 14:55:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:00,877 INFO L470 AbstractCegarLoop]: Abstraction has 23182 states and 154976 transitions. [2022-01-18 14:55:00,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:55:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 23182 states and 154976 transitions. [2022-01-18 14:55:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:55:00,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:00,936 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:00,951 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 14:55:01,137 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 14:55:01,137 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2116679720, now seen corresponding path program 24 times [2022-01-18 14:55:01,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:01,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582180465] [2022-01-18 14:55:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:01,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:55:01,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:01,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582180465] [2022-01-18 14:55:01,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582180465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:01,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174234313] [2022-01-18 14:55:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:55:01,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:01,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:01,171 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 14:55:01,172 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 14:55:01,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:55:01,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:01,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:55:01,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:55:01,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174234313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:01,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:01,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:55:01,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997632890] [2022-01-18 14:55:01,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:01,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:01,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:01,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:01,337 INFO L87 Difference]: Start difference. First operand 23182 states and 154976 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:02,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:02,290 INFO L93 Difference]: Finished difference Result 46372 states and 305862 transitions. [2022-01-18 14:55:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:55:02,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 32 [2022-01-18 14:55:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:02,473 INFO L225 Difference]: With dead ends: 46372 [2022-01-18 14:55:02,473 INFO L226 Difference]: Without dead ends: 33280 [2022-01-18 14:55:02,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:55:02,474 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:02,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 280 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2022-01-18 14:55:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 19618. [2022-01-18 14:55:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19618 states, 19617 states have (on average 6.602946424019983) internal successors, (129530), 19617 states have internal predecessors, (129530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19618 states to 19618 states and 129530 transitions. [2022-01-18 14:55:03,382 INFO L78 Accepts]: Start accepts. Automaton has 19618 states and 129530 transitions. Word has length 32 [2022-01-18 14:55:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:03,382 INFO L470 AbstractCegarLoop]: Abstraction has 19618 states and 129530 transitions. [2022-01-18 14:55:03,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 19618 states and 129530 transitions. [2022-01-18 14:55:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:55:03,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:03,431 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:03,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 14:55:03,643 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 14:55:03,643 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:03,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1909541148, now seen corresponding path program 25 times [2022-01-18 14:55:03,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:03,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424322339] [2022-01-18 14:55:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:03,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:55:03,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:03,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424322339] [2022-01-18 14:55:03,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424322339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:03,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475501943] [2022-01-18 14:55:03,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:55:03,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:03,681 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 14:55:03,682 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 14:55:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:03,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:03,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:55:03,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:55:03,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475501943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:03,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:03,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:55:03,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974138355] [2022-01-18 14:55:03,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:03,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:03,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:03,837 INFO L87 Difference]: Start difference. First operand 19618 states and 129530 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 14:55:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:04,213 INFO L93 Difference]: Finished difference Result 24373 states and 161087 transitions. [2022-01-18 14:55:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:55:04,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 32 [2022-01-18 14:55:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:04,306 INFO L225 Difference]: With dead ends: 24373 [2022-01-18 14:55:04,307 INFO L226 Difference]: Without dead ends: 23182 [2022-01-18 14:55:04,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:55:04,307 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 136 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:04,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 211 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23182 states. [2022-01-18 14:55:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23182 to 20806. [2022-01-18 14:55:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20806 states, 20805 states have (on average 6.605046863734679) internal successors, (137418), 20805 states have internal predecessors, (137418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20806 states to 20806 states and 137418 transitions. [2022-01-18 14:55:05,053 INFO L78 Accepts]: Start accepts. Automaton has 20806 states and 137418 transitions. Word has length 32 [2022-01-18 14:55:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:05,053 INFO L470 AbstractCegarLoop]: Abstraction has 20806 states and 137418 transitions. [2022-01-18 14:55:05,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 14:55:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 20806 states and 137418 transitions. [2022-01-18 14:55:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:55:05,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:05,105 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:05,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 14:55:05,305 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 14:55:05,305 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:05,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2113015867, now seen corresponding path program 26 times [2022-01-18 14:55:05,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:05,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965551893] [2022-01-18 14:55:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:05,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:55:05,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:05,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965551893] [2022-01-18 14:55:05,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965551893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:05,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050440492] [2022-01-18 14:55:05,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:55:05,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:05,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:05,347 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 14:55:05,348 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 14:55:05,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:55:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:05,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:55:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:55:05,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:55:05,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050440492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:05,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:05,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8 [2022-01-18 14:55:05,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913579265] [2022-01-18 14:55:05,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:05,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:55:05,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:55:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:55:05,846 INFO L87 Difference]: Start difference. First operand 20806 states and 137418 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:06,340 INFO L93 Difference]: Finished difference Result 38386 states and 254116 transitions. [2022-01-18 14:55:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:55:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:55:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:06,507 INFO L225 Difference]: With dead ends: 38386 [2022-01-18 14:55:06,508 INFO L226 Difference]: Without dead ends: 37790 [2022-01-18 14:55:06,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:55:06,508 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:06,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 212 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37790 states. [2022-01-18 14:55:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37790 to 31835. [2022-01-18 14:55:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 6.805648049255513) internal successors, (216651), 31834 states have internal predecessors, (216651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 216651 transitions. [2022-01-18 14:55:07,942 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 216651 transitions. Word has length 33 [2022-01-18 14:55:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:07,942 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 216651 transitions. [2022-01-18 14:55:07,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 216651 transitions. [2022-01-18 14:55:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:55:08,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:08,046 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:08,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 14:55:08,246 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 14:55:08,246 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1800076997, now seen corresponding path program 27 times [2022-01-18 14:55:08,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:08,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678836922] [2022-01-18 14:55:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:08,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 14:55:08,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678836922] [2022-01-18 14:55:08,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678836922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147112552] [2022-01-18 14:55:08,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:55:08,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:08,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:08,287 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 14:55:08,287 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 14:55:08,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:55:08,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:55:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:08,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:55:08,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147112552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:08,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:08,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2022-01-18 14:55:08,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152337441] [2022-01-18 14:55:08,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:08,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:08,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:08,507 INFO L87 Difference]: Start difference. First operand 31835 states and 216651 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:10,347 INFO L93 Difference]: Finished difference Result 76452 states and 499137 transitions. [2022-01-18 14:55:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 14:55:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:55:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:10,760 INFO L225 Difference]: With dead ends: 76452 [2022-01-18 14:55:10,760 INFO L226 Difference]: Without dead ends: 71950 [2022-01-18 14:55:10,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:55:10,761 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 257 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:10,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1029 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:55:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71950 states. [2022-01-18 14:55:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71950 to 45299. [2022-01-18 14:55:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45299 states, 45298 states have (on average 7.045123405006843) internal successors, (319130), 45298 states have internal predecessors, (319130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45299 states to 45299 states and 319130 transitions. [2022-01-18 14:55:12,791 INFO L78 Accepts]: Start accepts. Automaton has 45299 states and 319130 transitions. Word has length 33 [2022-01-18 14:55:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:12,792 INFO L470 AbstractCegarLoop]: Abstraction has 45299 states and 319130 transitions. [2022-01-18 14:55:12,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 45299 states and 319130 transitions. [2022-01-18 14:55:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:12,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:12,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:12,961 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 14:55:13,155 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 14:55:13,155 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1235120450, now seen corresponding path program 28 times [2022-01-18 14:55:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:13,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301619757] [2022-01-18 14:55:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:13,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:13,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301619757] [2022-01-18 14:55:13,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301619757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589272656] [2022-01-18 14:55:13,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:55:13,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:13,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:13,186 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 14:55:13,188 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 14:55:13,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:55:13,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:13,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:13,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:13,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:13,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589272656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:13,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:13,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:55:13,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407196362] [2022-01-18 14:55:13,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:13,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:55:13,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:55:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:55:13,362 INFO L87 Difference]: Start difference. First operand 45299 states and 319130 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 14:55:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:14,504 INFO L93 Difference]: Finished difference Result 71328 states and 479587 transitions. [2022-01-18 14:55:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:55:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 34 [2022-01-18 14:55:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:14,843 INFO L225 Difference]: With dead ends: 71328 [2022-01-18 14:55:14,843 INFO L226 Difference]: Without dead ends: 61764 [2022-01-18 14:55:14,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:55:14,844 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 110 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:14,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 248 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61764 states. [2022-01-18 14:55:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61764 to 45298. [2022-01-18 14:55:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45298 states, 45297 states have (on average 6.9854957281939205) internal successors, (316422), 45297 states have internal predecessors, (316422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45298 states to 45298 states and 316422 transitions. [2022-01-18 14:55:16,744 INFO L78 Accepts]: Start accepts. Automaton has 45298 states and 316422 transitions. Word has length 34 [2022-01-18 14:55:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:16,744 INFO L470 AbstractCegarLoop]: Abstraction has 45298 states and 316422 transitions. [2022-01-18 14:55:16,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 14:55:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45298 states and 316422 transitions. [2022-01-18 14:55:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:16,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:16,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:16,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 14:55:17,091 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 14:55:17,091 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1110638710, now seen corresponding path program 29 times [2022-01-18 14:55:17,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873988047] [2022-01-18 14:55:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:17,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:17,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873988047] [2022-01-18 14:55:17,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873988047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217040718] [2022-01-18 14:55:17,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:55:17,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:17,126 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 14:55:17,135 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 14:55:17,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:55:17,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:17,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:17,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217040718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:17,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:17,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:55:17,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105237594] [2022-01-18 14:55:17,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:17,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:17,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:17,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:17,300 INFO L87 Difference]: Start difference. First operand 45298 states and 316422 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:18,610 INFO L93 Difference]: Finished difference Result 79431 states and 527696 transitions. [2022-01-18 14:55:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:55:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 14:55:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:18,934 INFO L225 Difference]: With dead ends: 79431 [2022-01-18 14:55:18,935 INFO L226 Difference]: Without dead ends: 54866 [2022-01-18 14:55:18,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:55:18,935 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 178 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:18,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 253 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54866 states. [2022-01-18 14:55:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54866 to 40122. [2022-01-18 14:55:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40122 states, 40121 states have (on average 6.923107599511478) internal successors, (277762), 40121 states have internal predecessors, (277762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40122 states to 40122 states and 277762 transitions. [2022-01-18 14:55:20,767 INFO L78 Accepts]: Start accepts. Automaton has 40122 states and 277762 transitions. Word has length 34 [2022-01-18 14:55:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:20,767 INFO L470 AbstractCegarLoop]: Abstraction has 40122 states and 277762 transitions. [2022-01-18 14:55:20,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 40122 states and 277762 transitions. [2022-01-18 14:55:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:20,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:20,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:20,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 14:55:21,091 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 14:55:21,091 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash -446438244, now seen corresponding path program 30 times [2022-01-18 14:55:21,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:21,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927109792] [2022-01-18 14:55:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:21,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:55:21,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:21,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927109792] [2022-01-18 14:55:21,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927109792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:21,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296416725] [2022-01-18 14:55:21,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:55:21,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:21,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:21,124 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 14:55:21,124 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 14:55:21,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:55:21,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:21,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:21,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:21,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 14:55:21,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296416725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:21,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:21,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:55:21,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780281740] [2022-01-18 14:55:21,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:21,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:21,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:21,308 INFO L87 Difference]: Start difference. First operand 40122 states and 277762 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:22,572 INFO L93 Difference]: Finished difference Result 85865 states and 563740 transitions. [2022-01-18 14:55:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:55:22,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 34 [2022-01-18 14:55:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:22,927 INFO L225 Difference]: With dead ends: 85865 [2022-01-18 14:55:22,927 INFO L226 Difference]: Without dead ends: 62787 [2022-01-18 14:55:22,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:55:22,927 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 142 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:22,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 210 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62787 states. [2022-01-18 14:55:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62787 to 39220. [2022-01-18 14:55:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39220 states, 39219 states have (on average 6.795660266707463) internal successors, (266519), 39219 states have internal predecessors, (266519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39220 states to 39220 states and 266519 transitions. [2022-01-18 14:55:25,003 INFO L78 Accepts]: Start accepts. Automaton has 39220 states and 266519 transitions. Word has length 34 [2022-01-18 14:55:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:25,003 INFO L470 AbstractCegarLoop]: Abstraction has 39220 states and 266519 transitions. [2022-01-18 14:55:25,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 39220 states and 266519 transitions. [2022-01-18 14:55:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:25,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:25,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:25,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 14:55:25,323 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 14:55:25,323 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 422116352, now seen corresponding path program 31 times [2022-01-18 14:55:25,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:25,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640351115] [2022-01-18 14:55:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:25,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:25,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:25,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640351115] [2022-01-18 14:55:25,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640351115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:25,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371654315] [2022-01-18 14:55:25,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:55:25,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:25,357 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 14:55:25,358 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 14:55:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:25,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:25,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:55:25,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371654315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:25,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:25,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:55:25,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582661942] [2022-01-18 14:55:25,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:25,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:25,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:25,530 INFO L87 Difference]: Start difference. First operand 39220 states and 266519 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:26,765 INFO L93 Difference]: Finished difference Result 76848 states and 503197 transitions. [2022-01-18 14:55:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:55:26,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 34 [2022-01-18 14:55:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:27,086 INFO L225 Difference]: With dead ends: 76848 [2022-01-18 14:55:27,086 INFO L226 Difference]: Without dead ends: 55886 [2022-01-18 14:55:27,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:55:27,087 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 123 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:27,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 224 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55886 states. [2022-01-18 14:55:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55886 to 36632. [2022-01-18 14:55:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36632 states, 36631 states have (on average 6.734159591602741) internal successors, (246679), 36631 states have internal predecessors, (246679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36632 states to 36632 states and 246679 transitions. [2022-01-18 14:55:28,525 INFO L78 Accepts]: Start accepts. Automaton has 36632 states and 246679 transitions. Word has length 34 [2022-01-18 14:55:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:28,525 INFO L470 AbstractCegarLoop]: Abstraction has 36632 states and 246679 transitions. [2022-01-18 14:55:28,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36632 states and 246679 transitions. [2022-01-18 14:55:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:28,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:28,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:28,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 14:55:28,847 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 14:55:28,847 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash -87356738, now seen corresponding path program 32 times [2022-01-18 14:55:28,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:28,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117785641] [2022-01-18 14:55:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:28,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:28,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117785641] [2022-01-18 14:55:28,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117785641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838247165] [2022-01-18 14:55:28,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:55:28,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:28,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:28,880 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 14:55:28,881 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 14:55:28,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:55:28,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:29,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:29,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838247165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:29,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:29,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:55:29,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65431563] [2022-01-18 14:55:29,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:29,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:55:29,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:55:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:55:29,064 INFO L87 Difference]: Start difference. First operand 36632 states and 246679 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 14:55:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:30,207 INFO L93 Difference]: Finished difference Result 57373 states and 381185 transitions. [2022-01-18 14:55:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:55:30,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 34 [2022-01-18 14:55:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:30,501 INFO L225 Difference]: With dead ends: 57373 [2022-01-18 14:55:30,501 INFO L226 Difference]: Without dead ends: 52868 [2022-01-18 14:55:30,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:55:30,502 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 105 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:30,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 257 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52868 states. [2022-01-18 14:55:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52868 to 36632. [2022-01-18 14:55:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36632 states, 36631 states have (on average 6.734159591602741) internal successors, (246679), 36631 states have internal predecessors, (246679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36632 states to 36632 states and 246679 transitions. [2022-01-18 14:55:31,926 INFO L78 Accepts]: Start accepts. Automaton has 36632 states and 246679 transitions. Word has length 34 [2022-01-18 14:55:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:31,926 INFO L470 AbstractCegarLoop]: Abstraction has 36632 states and 246679 transitions. [2022-01-18 14:55:31,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 14:55:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 36632 states and 246679 transitions. [2022-01-18 14:55:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:32,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:32,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:32,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 14:55:32,587 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 14:55:32,587 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1127109322, now seen corresponding path program 33 times [2022-01-18 14:55:32,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925699256] [2022-01-18 14:55:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:32,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:32,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:32,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925699256] [2022-01-18 14:55:32,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925699256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:32,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263569108] [2022-01-18 14:55:32,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:55:32,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:32,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:32,619 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 14:55:32,620 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 14:55:32,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:55:32,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:55:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 14:55:32,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 14:55:32,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263569108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:32,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:32,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5] total 16 [2022-01-18 14:55:32,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223340807] [2022-01-18 14:55:32,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:32,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:55:32,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:32,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:55:32,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:55:32,948 INFO L87 Difference]: Start difference. First operand 36632 states and 246679 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 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 14:55:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:35,856 INFO L93 Difference]: Finished difference Result 88229 states and 577190 transitions. [2022-01-18 14:55:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 14:55:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 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 34 [2022-01-18 14:55:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:36,315 INFO L225 Difference]: With dead ends: 88229 [2022-01-18 14:55:36,316 INFO L226 Difference]: Without dead ends: 80589 [2022-01-18 14:55:36,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=440, Invalid=4816, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 14:55:36,317 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 573 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 3153 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 3153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:36,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 1550 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 3153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 14:55:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80589 states. [2022-01-18 14:55:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80589 to 42432. [2022-01-18 14:55:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42432 states, 42431 states have (on average 6.8397869482218185) internal successors, (290219), 42431 states have internal predecessors, (290219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42432 states to 42432 states and 290219 transitions. [2022-01-18 14:55:38,542 INFO L78 Accepts]: Start accepts. Automaton has 42432 states and 290219 transitions. Word has length 34 [2022-01-18 14:55:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:38,543 INFO L470 AbstractCegarLoop]: Abstraction has 42432 states and 290219 transitions. [2022-01-18 14:55:38,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 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 14:55:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42432 states and 290219 transitions. [2022-01-18 14:55:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:38,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:38,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:38,688 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 14:55:38,872 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 14:55:38,872 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash -765936478, now seen corresponding path program 34 times [2022-01-18 14:55:38,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118836332] [2022-01-18 14:55:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:38,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:38,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:38,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118836332] [2022-01-18 14:55:38,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118836332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:38,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893432848] [2022-01-18 14:55:38,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:55:38,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:38,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:38,900 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 14:55:38,900 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 14:55:38,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:55:38,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:39,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:55:39,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893432848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:39,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:39,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:55:39,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211480349] [2022-01-18 14:55:39,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:55:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:55:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:55:39,066 INFO L87 Difference]: Start difference. First operand 42432 states and 290219 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:55:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:40,346 INFO L93 Difference]: Finished difference Result 81147 states and 534322 transitions. [2022-01-18 14:55:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:55:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 34 [2022-01-18 14:55:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:40,723 INFO L225 Difference]: With dead ends: 81147 [2022-01-18 14:55:40,724 INFO L226 Difference]: Without dead ends: 63386 [2022-01-18 14:55:40,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:55:40,724 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 160 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:40,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 216 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63386 states. [2022-01-18 14:55:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63386 to 42432. [2022-01-18 14:55:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42432 states, 42431 states have (on average 6.815229431312012) internal successors, (289177), 42431 states have internal predecessors, (289177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42432 states to 42432 states and 289177 transitions. [2022-01-18 14:55:42,547 INFO L78 Accepts]: Start accepts. Automaton has 42432 states and 289177 transitions. Word has length 34 [2022-01-18 14:55:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:42,547 INFO L470 AbstractCegarLoop]: Abstraction has 42432 states and 289177 transitions. [2022-01-18 14:55:42,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:55:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42432 states and 289177 transitions. [2022-01-18 14:55:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:42,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:42,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:42,708 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 14:55:42,899 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 14:55:42,899 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash 102618118, now seen corresponding path program 35 times [2022-01-18 14:55:42,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:42,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261952823] [2022-01-18 14:55:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:42,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:43,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261952823] [2022-01-18 14:55:43,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261952823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901837903] [2022-01-18 14:55:43,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:55:43,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:43,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:43,343 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 14:55:43,410 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 14:55:43,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:55:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:43,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:43,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:43,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901837903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:43,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:43,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:55:43,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704258195] [2022-01-18 14:55:43,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:43,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:55:43,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:55:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:55:43,559 INFO L87 Difference]: Start difference. First operand 42432 states and 289177 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:55:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:44,399 INFO L93 Difference]: Finished difference Result 71541 states and 473268 transitions. [2022-01-18 14:55:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:55:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 34 [2022-01-18 14:55:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:44,740 INFO L225 Difference]: With dead ends: 71541 [2022-01-18 14:55:44,740 INFO L226 Difference]: Without dead ends: 64074 [2022-01-18 14:55:44,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:55:44,741 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 106 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:44,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 235 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64074 states. [2022-01-18 14:55:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64074 to 41390. [2022-01-18 14:55:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41390 states, 41389 states have (on average 6.742564449491411) internal successors, (279068), 41389 states have internal predecessors, (279068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41390 states to 41390 states and 279068 transitions. [2022-01-18 14:55:46,640 INFO L78 Accepts]: Start accepts. Automaton has 41390 states and 279068 transitions. Word has length 34 [2022-01-18 14:55:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:46,640 INFO L470 AbstractCegarLoop]: Abstraction has 41390 states and 279068 transitions. [2022-01-18 14:55:46,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 14:55:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 41390 states and 279068 transitions. [2022-01-18 14:55:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:46,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:46,765 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:46,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 14:55:46,966 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 14:55:46,966 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -406854972, now seen corresponding path program 36 times [2022-01-18 14:55:46,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:46,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017355666] [2022-01-18 14:55:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:46,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:55:46,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:46,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017355666] [2022-01-18 14:55:46,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017355666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:46,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134316517] [2022-01-18 14:55:46,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:55:46,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:46,996 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 14:55:46,997 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 14:55:47,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:55:47,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:47,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:47,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:55:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134316517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:47,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:47,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:55:47,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717450165] [2022-01-18 14:55:47,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:47,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:47,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:47,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:47,164 INFO L87 Difference]: Start difference. First operand 41390 states and 279068 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:48,726 INFO L93 Difference]: Finished difference Result 107476 states and 703763 transitions. [2022-01-18 14:55:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:55:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 34 [2022-01-18 14:55:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:49,068 INFO L225 Difference]: With dead ends: 107476 [2022-01-18 14:55:49,068 INFO L226 Difference]: Without dead ends: 59104 [2022-01-18 14:55:49,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:55:49,069 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 220 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:49,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 238 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59104 states. [2022-01-18 14:55:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59104 to 35138. [2022-01-18 14:55:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35138 states, 35137 states have (on average 6.660898767680792) internal successors, (234044), 35137 states have internal predecessors, (234044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35138 states to 35138 states and 234044 transitions. [2022-01-18 14:55:51,057 INFO L78 Accepts]: Start accepts. Automaton has 35138 states and 234044 transitions. Word has length 34 [2022-01-18 14:55:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:51,058 INFO L470 AbstractCegarLoop]: Abstraction has 35138 states and 234044 transitions. [2022-01-18 14:55:51,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 14:55:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 35138 states and 234044 transitions. [2022-01-18 14:55:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:55:51,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:51,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:51,195 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 14:55:51,379 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 14:55:51,379 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1488821512, now seen corresponding path program 37 times [2022-01-18 14:55:51,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:51,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989658175] [2022-01-18 14:55:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:51,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:51,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:51,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989658175] [2022-01-18 14:55:51,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989658175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:51,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129516986] [2022-01-18 14:55:51,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:55:51,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:51,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:51,412 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 14:55:51,413 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 14:55:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:55:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:51,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:51,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129516986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:51,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:51,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:55:51,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943552638] [2022-01-18 14:55:51,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:51,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:55:51,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:51,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:55:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:55:51,590 INFO L87 Difference]: Start difference. First operand 35138 states and 234044 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 14:55:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:52,222 INFO L93 Difference]: Finished difference Result 46655 states and 309604 transitions. [2022-01-18 14:55:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:55:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 14:55:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:52,415 INFO L225 Difference]: With dead ends: 46655 [2022-01-18 14:55:52,415 INFO L226 Difference]: Without dead ends: 41390 [2022-01-18 14:55:52,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:55:52,415 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 105 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:52,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 247 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:55:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41390 states. [2022-01-18 14:55:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41390 to 37222. [2022-01-18 14:55:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37222 states, 37221 states have (on average 6.6631740146691385) internal successors, (248010), 37221 states have internal predecessors, (248010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37222 states to 37222 states and 248010 transitions. [2022-01-18 14:55:53,698 INFO L78 Accepts]: Start accepts. Automaton has 37222 states and 248010 transitions. Word has length 34 [2022-01-18 14:55:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:55:53,698 INFO L470 AbstractCegarLoop]: Abstraction has 37222 states and 248010 transitions. [2022-01-18 14:55:53,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 14:55:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 37222 states and 248010 transitions. [2022-01-18 14:55:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:55:54,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:55:54,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:55:54,123 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 14:55:54,320 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 14:55:54,321 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:55:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:55:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1002227485, now seen corresponding path program 38 times [2022-01-18 14:55:54,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:55:54,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736074401] [2022-01-18 14:55:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:55:54,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:55:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:55:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:55:54,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:55:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736074401] [2022-01-18 14:55:54,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736074401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:55:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930190707] [2022-01-18 14:55:54,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:55:54,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:55:54,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:55:54,363 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 14:55:54,364 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 14:55:54,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:55:54,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:55:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:55:54,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:55:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:54,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:55:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:55:54,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930190707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:55:54,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:55:54,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 12 [2022-01-18 14:55:54,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811447029] [2022-01-18 14:55:54,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:55:54,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:55:54,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:55:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:55:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:55:54,593 INFO L87 Difference]: Start difference. First operand 37222 states and 248010 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 12 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:55:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:55:57,036 INFO L93 Difference]: Finished difference Result 117742 states and 763520 transitions. [2022-01-18 14:55:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 14:55:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 12 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:55:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:55:57,732 INFO L225 Difference]: With dead ends: 117742 [2022-01-18 14:55:57,732 INFO L226 Difference]: Without dead ends: 111949 [2022-01-18 14:55:57,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:55:57,733 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 294 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:55:57,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1303 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:55:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111949 states. [2022-01-18 14:56:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111949 to 73250. [2022-01-18 14:56:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73250 states, 73249 states have (on average 6.958743464074595) internal successors, (509721), 73249 states have internal predecessors, (509721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73250 states to 73250 states and 509721 transitions. [2022-01-18 14:56:01,268 INFO L78 Accepts]: Start accepts. Automaton has 73250 states and 509721 transitions. Word has length 35 [2022-01-18 14:56:01,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:01,268 INFO L470 AbstractCegarLoop]: Abstraction has 73250 states and 509721 transitions. [2022-01-18 14:56:01,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 12 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 73250 states and 509721 transitions. [2022-01-18 14:56:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:01,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:01,613 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:01,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 14:56:01,813 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 14:56:01,813 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:01,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1664851718, now seen corresponding path program 39 times [2022-01-18 14:56:01,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:01,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308466909] [2022-01-18 14:56:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:01,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:01,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:01,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308466909] [2022-01-18 14:56:01,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308466909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:01,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577557665] [2022-01-18 14:56:01,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:56:01,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:01,856 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 14:56:01,858 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 14:56:01,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:56:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:02,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:02,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577557665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:02,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:02,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 11 [2022-01-18 14:56:02,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773132855] [2022-01-18 14:56:02,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:02,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:56:02,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:56:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:56:02,070 INFO L87 Difference]: Start difference. First operand 73250 states and 509721 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 14:56:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:03,907 INFO L93 Difference]: Finished difference Result 97805 states and 659980 transitions. [2022-01-18 14:56:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:56:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 36 [2022-01-18 14:56:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:04,467 INFO L225 Difference]: With dead ends: 97805 [2022-01-18 14:56:04,467 INFO L226 Difference]: Without dead ends: 92064 [2022-01-18 14:56:04,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:56:04,468 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 130 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:04,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 449 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:56:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92064 states. [2022-01-18 14:56:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92064 to 74286. [2022-01-18 14:56:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74286 states, 74285 states have (on average 6.894581678669987) internal successors, (512164), 74285 states have internal predecessors, (512164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74286 states to 74286 states and 512164 transitions. [2022-01-18 14:56:07,417 INFO L78 Accepts]: Start accepts. Automaton has 74286 states and 512164 transitions. Word has length 36 [2022-01-18 14:56:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:07,418 INFO L470 AbstractCegarLoop]: Abstraction has 74286 states and 512164 transitions. [2022-01-18 14:56:07,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 14:56:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 74286 states and 512164 transitions. [2022-01-18 14:56:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:08,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:08,168 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:08,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 14:56:08,377 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 14:56:08,378 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:08,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:08,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1427550028, now seen corresponding path program 40 times [2022-01-18 14:56:08,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:08,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852672056] [2022-01-18 14:56:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:08,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:08,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:08,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852672056] [2022-01-18 14:56:08,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852672056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:08,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369113784] [2022-01-18 14:56:08,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:56:08,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:08,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:08,428 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 14:56:08,429 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 14:56:08,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:56:08,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:08,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:08,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:08,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369113784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:08,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:08,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 14:56:08,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591727482] [2022-01-18 14:56:08,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:08,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:56:08,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:56:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:56:08,649 INFO L87 Difference]: Start difference. First operand 74286 states and 512164 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 14:56:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:10,492 INFO L93 Difference]: Finished difference Result 103074 states and 691482 transitions. [2022-01-18 14:56:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:56:10,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 36 [2022-01-18 14:56:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:11,013 INFO L225 Difference]: With dead ends: 103074 [2022-01-18 14:56:11,013 INFO L226 Difference]: Without dead ends: 85288 [2022-01-18 14:56:11,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:56:11,014 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 287 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:11,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 462 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:56:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85288 states. [2022-01-18 14:56:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85288 to 65821. [2022-01-18 14:56:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65821 states, 65820 states have (on average 6.872622303251291) internal successors, (452356), 65820 states have internal predecessors, (452356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65821 states to 65821 states and 452356 transitions. [2022-01-18 14:56:13,759 INFO L78 Accepts]: Start accepts. Automaton has 65821 states and 452356 transitions. Word has length 36 [2022-01-18 14:56:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:13,759 INFO L470 AbstractCegarLoop]: Abstraction has 65821 states and 452356 transitions. [2022-01-18 14:56:13,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 14:56:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 65821 states and 452356 transitions. [2022-01-18 14:56:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:13,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:13,975 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:13,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 14:56:14,175 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 14:56:14,175 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -618057222, now seen corresponding path program 41 times [2022-01-18 14:56:14,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927118378] [2022-01-18 14:56:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:14,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:56:14,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:14,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927118378] [2022-01-18 14:56:14,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927118378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:14,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751557779] [2022-01-18 14:56:14,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:56:14,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:14,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:14,216 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 14:56:14,218 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 14:56:14,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:56:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:14,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:14,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 14:56:14,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751557779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:14,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:14,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 12 [2022-01-18 14:56:14,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578114105] [2022-01-18 14:56:14,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:14,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:56:14,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:14,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:56:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:56:14,421 INFO L87 Difference]: Start difference. First operand 65821 states and 452356 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:15,986 INFO L93 Difference]: Finished difference Result 97148 states and 645553 transitions. [2022-01-18 14:56:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:56:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:56:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:16,469 INFO L225 Difference]: With dead ends: 97148 [2022-01-18 14:56:16,469 INFO L226 Difference]: Without dead ends: 86980 [2022-01-18 14:56:16,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:56:16,861 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 166 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:16,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 396 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:56:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86980 states. [2022-01-18 14:56:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86980 to 65822. [2022-01-18 14:56:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65822 states, 65821 states have (on average 6.7954300299296575) internal successors, (447282), 65821 states have internal predecessors, (447282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65822 states to 65822 states and 447282 transitions. [2022-01-18 14:56:19,631 INFO L78 Accepts]: Start accepts. Automaton has 65822 states and 447282 transitions. Word has length 36 [2022-01-18 14:56:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:19,631 INFO L470 AbstractCegarLoop]: Abstraction has 65822 states and 447282 transitions. [2022-01-18 14:56:19,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 65822 states and 447282 transitions. [2022-01-18 14:56:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:19,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:19,876 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:19,892 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 14:56:20,091 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 14:56:20,091 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1298708386, now seen corresponding path program 42 times [2022-01-18 14:56:20,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:20,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313874512] [2022-01-18 14:56:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:20,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:20,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313874512] [2022-01-18 14:56:20,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313874512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975623258] [2022-01-18 14:56:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:56:20,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:20,126 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 14:56:20,127 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 14:56:20,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:56:20,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:20,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:20,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:20,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:56:20,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975623258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:20,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:20,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 12 [2022-01-18 14:56:20,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684895741] [2022-01-18 14:56:20,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:20,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:56:20,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:56:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:56:20,334 INFO L87 Difference]: Start difference. First operand 65822 states and 447282 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:22,184 INFO L93 Difference]: Finished difference Result 98844 states and 653962 transitions. [2022-01-18 14:56:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:56:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:56:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:22,698 INFO L225 Difference]: With dead ends: 98844 [2022-01-18 14:56:22,698 INFO L226 Difference]: Without dead ends: 84448 [2022-01-18 14:56:22,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:56:22,698 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 182 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:22,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 446 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:56:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84448 states. [2022-01-18 14:56:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84448 to 65822. [2022-01-18 14:56:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65822 states, 65821 states have (on average 6.769723948283982) internal successors, (445590), 65821 states have internal predecessors, (445590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65822 states to 65822 states and 445590 transitions. [2022-01-18 14:56:25,394 INFO L78 Accepts]: Start accepts. Automaton has 65822 states and 445590 transitions. Word has length 36 [2022-01-18 14:56:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:25,394 INFO L470 AbstractCegarLoop]: Abstraction has 65822 states and 445590 transitions. [2022-01-18 14:56:25,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 65822 states and 445590 transitions. [2022-01-18 14:56:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:25,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:25,615 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:25,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 14:56:25,815 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 14:56:25,815 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1985141660, now seen corresponding path program 43 times [2022-01-18 14:56:25,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:25,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778755855] [2022-01-18 14:56:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:25,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:25,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778755855] [2022-01-18 14:56:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778755855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742945374] [2022-01-18 14:56:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:56:25,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:25,861 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 14:56:25,862 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 14:56:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:25,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:26,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:26,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742945374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:26,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:26,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 13 [2022-01-18 14:56:26,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964970226] [2022-01-18 14:56:26,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:26,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:56:26,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:56:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:56:26,069 INFO L87 Difference]: Start difference. First operand 65822 states and 445590 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:27,639 INFO L93 Difference]: Finished difference Result 92059 states and 611851 transitions. [2022-01-18 14:56:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:56:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:56:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:28,144 INFO L225 Difference]: With dead ends: 92059 [2022-01-18 14:56:28,144 INFO L226 Difference]: Without dead ends: 90364 [2022-01-18 14:56:28,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:56:28,144 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 155 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:28,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 428 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:56:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90364 states. [2022-01-18 14:56:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90364 to 65822. [2022-01-18 14:56:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65822 states, 65821 states have (on average 6.769723948283982) internal successors, (445590), 65821 states have internal predecessors, (445590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65822 states to 65822 states and 445590 transitions. [2022-01-18 14:56:30,823 INFO L78 Accepts]: Start accepts. Automaton has 65822 states and 445590 transitions. Word has length 36 [2022-01-18 14:56:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:30,824 INFO L470 AbstractCegarLoop]: Abstraction has 65822 states and 445590 transitions. [2022-01-18 14:56:30,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 65822 states and 445590 transitions. [2022-01-18 14:56:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:31,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:31,645 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:31,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 14:56:31,849 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 14:56:31,849 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash -279516632, now seen corresponding path program 44 times [2022-01-18 14:56:31,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255544233] [2022-01-18 14:56:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:31,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:56:31,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255544233] [2022-01-18 14:56:31,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255544233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692560501] [2022-01-18 14:56:31,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:56:31,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:31,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:31,880 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:56:31,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 14:56:31,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:56:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 14:56:32,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692560501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:32,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:32,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 13 [2022-01-18 14:56:32,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877393723] [2022-01-18 14:56:32,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:32,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:56:32,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:56:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:56:32,095 INFO L87 Difference]: Start difference. First operand 65822 states and 445590 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:34,233 INFO L93 Difference]: Finished difference Result 115771 states and 758340 transitions. [2022-01-18 14:56:34,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:56:34,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:56:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:34,898 INFO L225 Difference]: With dead ends: 115771 [2022-01-18 14:56:34,899 INFO L226 Difference]: Without dead ends: 103060 [2022-01-18 14:56:34,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:56:34,899 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 243 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:34,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 517 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:56:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103060 states. [2022-01-18 14:56:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103060 to 64975. [2022-01-18 14:56:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64975 states, 64974 states have (on average 6.747668298088466) internal successors, (438423), 64974 states have internal predecessors, (438423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64975 states to 64975 states and 438423 transitions. [2022-01-18 14:56:38,000 INFO L78 Accepts]: Start accepts. Automaton has 64975 states and 438423 transitions. Word has length 36 [2022-01-18 14:56:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:38,001 INFO L470 AbstractCegarLoop]: Abstraction has 64975 states and 438423 transitions. [2022-01-18 14:56:38,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 64975 states and 438423 transitions. [2022-01-18 14:56:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:38,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:38,252 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:38,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 14:56:38,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:38,463 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash -960167796, now seen corresponding path program 45 times [2022-01-18 14:56:38,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:38,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565650441] [2022-01-18 14:56:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:38,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:38,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565650441] [2022-01-18 14:56:38,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565650441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115607199] [2022-01-18 14:56:38,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:56:38,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:38,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:38,510 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:56:38,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 14:56:38,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:56:38,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:39,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:56:39,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115607199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:39,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:39,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 13 [2022-01-18 14:56:39,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753150211] [2022-01-18 14:56:39,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:39,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:56:39,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:56:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:56:39,314 INFO L87 Difference]: Start difference. First operand 64975 states and 438423 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:40,633 INFO L93 Difference]: Finished difference Result 102225 states and 669079 transitions. [2022-01-18 14:56:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:56:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:56:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:41,660 INFO L225 Difference]: With dead ends: 102225 [2022-01-18 14:56:41,660 INFO L226 Difference]: Without dead ends: 89525 [2022-01-18 14:56:41,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:56:41,665 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 168 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:41,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 453 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:56:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89525 states. [2022-01-18 14:56:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89525 to 66667. [2022-01-18 14:56:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66667 states, 66666 states have (on average 6.651741517415174) internal successors, (443445), 66666 states have internal predecessors, (443445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66667 states to 66667 states and 443445 transitions. [2022-01-18 14:56:44,509 INFO L78 Accepts]: Start accepts. Automaton has 66667 states and 443445 transitions. Word has length 36 [2022-01-18 14:56:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:44,509 INFO L470 AbstractCegarLoop]: Abstraction has 66667 states and 443445 transitions. [2022-01-18 14:56:44,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 66667 states and 443445 transitions. [2022-01-18 14:56:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:44,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:44,732 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:44,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 14:56:44,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 14:56:44,932 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1971285046, now seen corresponding path program 46 times [2022-01-18 14:56:44,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:44,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815107354] [2022-01-18 14:56:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:44,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:56:44,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:44,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815107354] [2022-01-18 14:56:44,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815107354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:44,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465453411] [2022-01-18 14:56:44,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:56:44,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:44,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:44,979 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:56:44,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 14:56:45,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:56:45,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:45,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:56:45,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465453411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:45,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:45,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 14 [2022-01-18 14:56:45,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595092115] [2022-01-18 14:56:45,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:45,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:56:45,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:56:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:56:45,199 INFO L87 Difference]: Start difference. First operand 66667 states and 443445 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:47,322 INFO L93 Difference]: Finished difference Result 119143 states and 777673 transitions. [2022-01-18 14:56:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:56:47,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:56:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:48,347 INFO L225 Difference]: With dead ends: 119143 [2022-01-18 14:56:48,347 INFO L226 Difference]: Without dead ends: 100507 [2022-01-18 14:56:48,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:56:48,348 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 250 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:48,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 425 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:56:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100507 states. [2022-01-18 14:56:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100507 to 61591. [2022-01-18 14:56:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61591 states, 61590 states have (on average 6.625669751583049) internal successors, (408075), 61590 states have internal predecessors, (408075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61591 states to 61591 states and 408075 transitions. [2022-01-18 14:56:50,754 INFO L78 Accepts]: Start accepts. Automaton has 61591 states and 408075 transitions. Word has length 36 [2022-01-18 14:56:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:50,754 INFO L470 AbstractCegarLoop]: Abstraction has 61591 states and 408075 transitions. [2022-01-18 14:56:50,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 61591 states and 408075 transitions. [2022-01-18 14:56:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:51,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:51,495 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:51,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 14:56:51,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 14:56:51,711 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2054935822, now seen corresponding path program 47 times [2022-01-18 14:56:51,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:51,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537673256] [2022-01-18 14:56:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:51,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:51,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:51,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537673256] [2022-01-18 14:56:51,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537673256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066910715] [2022-01-18 14:56:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:56:51,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:51,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:51,756 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:56:51,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 14:56:51,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:56:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:51,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:51,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:51,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066910715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:51,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:51,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 14:56:51,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494246545] [2022-01-18 14:56:51,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:51,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:56:51,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:56:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:56:51,984 INFO L87 Difference]: Start difference. First operand 61591 states and 408075 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:53,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:53,829 INFO L93 Difference]: Finished difference Result 90358 states and 592436 transitions. [2022-01-18 14:56:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:56:53,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:56:53,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:56:54,382 INFO L225 Difference]: With dead ends: 90358 [2022-01-18 14:56:54,382 INFO L226 Difference]: Without dead ends: 88663 [2022-01-18 14:56:54,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:56:54,382 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 209 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:56:54,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 471 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:56:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88663 states. [2022-01-18 14:56:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88663 to 61591. [2022-01-18 14:56:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61591 states, 61590 states have (on average 6.625669751583049) internal successors, (408075), 61590 states have internal predecessors, (408075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61591 states to 61591 states and 408075 transitions. [2022-01-18 14:56:57,150 INFO L78 Accepts]: Start accepts. Automaton has 61591 states and 408075 transitions. Word has length 36 [2022-01-18 14:56:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:56:57,154 INFO L470 AbstractCegarLoop]: Abstraction has 61591 states and 408075 transitions. [2022-01-18 14:56:57,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:56:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 61591 states and 408075 transitions. [2022-01-18 14:56:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:56:57,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:56:57,362 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:56:57,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 14:56:57,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:57,562 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:56:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:56:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash 538181982, now seen corresponding path program 48 times [2022-01-18 14:56:57,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:56:57,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195953938] [2022-01-18 14:56:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:56:57,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:56:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:56:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:57,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:56:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195953938] [2022-01-18 14:56:57,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195953938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:56:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083867362] [2022-01-18 14:56:57,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:56:57,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:56:57,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:56:57,608 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:56:57,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 14:56:57,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:56:57,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:56:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:56:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:56:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:57,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:56:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:56:57,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083867362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:56:57,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:56:57,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 14:56:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172337000] [2022-01-18 14:56:57,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:56:57,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:56:57,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:56:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:56:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:56:57,847 INFO L87 Difference]: Start difference. First operand 61591 states and 408075 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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 14:56:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:56:59,755 INFO L93 Difference]: Finished difference Result 112379 states and 733060 transitions. [2022-01-18 14:56:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:56:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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 36 [2022-01-18 14:56:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:00,399 INFO L225 Difference]: With dead ends: 112379 [2022-01-18 14:57:00,399 INFO L226 Difference]: Without dead ends: 101368 [2022-01-18 14:57:00,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:57:00,400 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 249 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:00,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 476 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:57:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101368 states. [2022-01-18 14:57:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101368 to 56512. [2022-01-18 14:57:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56512 states, 56511 states have (on average 6.595140769053812) internal successors, (372698), 56511 states have internal predecessors, (372698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56512 states to 56512 states and 372698 transitions. [2022-01-18 14:57:03,241 INFO L78 Accepts]: Start accepts. Automaton has 56512 states and 372698 transitions. Word has length 36 [2022-01-18 14:57:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:03,241 INFO L470 AbstractCegarLoop]: Abstraction has 56512 states and 372698 transitions. [2022-01-18 14:57:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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 14:57:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 56512 states and 372698 transitions. [2022-01-18 14:57:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:57:03,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:03,429 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:03,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 14:57:03,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 14:57:03,630 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1081312328, now seen corresponding path program 49 times [2022-01-18 14:57:03,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:03,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629517069] [2022-01-18 14:57:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:03,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:57:03,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629517069] [2022-01-18 14:57:03,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629517069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684454262] [2022-01-18 14:57:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:57:03,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:03,664 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:03,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 14:57:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:03,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:57:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:57:03,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:57:03,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684454262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:03,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:03,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 13 [2022-01-18 14:57:03,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535220382] [2022-01-18 14:57:03,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:03,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:57:03,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:57:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:57:03,863 INFO L87 Difference]: Start difference. First operand 56512 states and 372698 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 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 14:57:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:05,351 INFO L93 Difference]: Finished difference Result 77671 states and 509515 transitions. [2022-01-18 14:57:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:57:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 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 36 [2022-01-18 14:57:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:05,756 INFO L225 Difference]: With dead ends: 77671 [2022-01-18 14:57:05,757 INFO L226 Difference]: Without dead ends: 75977 [2022-01-18 14:57:05,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:57:05,757 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:05,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 365 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:57:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75977 states. [2022-01-18 14:57:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75977 to 56512. [2022-01-18 14:57:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56512 states, 56511 states have (on average 6.595140769053812) internal successors, (372698), 56511 states have internal predecessors, (372698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56512 states to 56512 states and 372698 transitions. [2022-01-18 14:57:08,342 INFO L78 Accepts]: Start accepts. Automaton has 56512 states and 372698 transitions. Word has length 36 [2022-01-18 14:57:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:08,342 INFO L470 AbstractCegarLoop]: Abstraction has 56512 states and 372698 transitions. [2022-01-18 14:57:08,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 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 14:57:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 56512 states and 372698 transitions. [2022-01-18 14:57:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:57:08,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:08,529 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:08,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 14:57:08,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 14:57:08,729 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1625307066, now seen corresponding path program 50 times [2022-01-18 14:57:08,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:08,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165337141] [2022-01-18 14:57:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:08,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:57:08,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:08,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165337141] [2022-01-18 14:57:08,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165337141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:08,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22205173] [2022-01-18 14:57:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:57:08,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:08,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:08,770 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:08,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 14:57:08,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:57:08,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:57:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:57:08,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-18 14:57:08,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22205173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:08,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:08,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 11 [2022-01-18 14:57:08,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586492028] [2022-01-18 14:57:08,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:08,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:57:08,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:57:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:57:08,969 INFO L87 Difference]: Start difference. First operand 56512 states and 372698 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:10,471 INFO L93 Difference]: Finished difference Result 83612 states and 539385 transitions. [2022-01-18 14:57:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:57:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:57:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:10,876 INFO L225 Difference]: With dead ends: 83612 [2022-01-18 14:57:10,876 INFO L226 Difference]: Without dead ends: 75985 [2022-01-18 14:57:10,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:57:10,876 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 219 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:10,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 423 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:57:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75985 states. [2022-01-18 14:57:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75985 to 56512. [2022-01-18 14:57:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56512 states, 56511 states have (on average 6.5801702323441456) internal successors, (371852), 56511 states have internal predecessors, (371852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56512 states to 56512 states and 371852 transitions. [2022-01-18 14:57:13,307 INFO L78 Accepts]: Start accepts. Automaton has 56512 states and 371852 transitions. Word has length 36 [2022-01-18 14:57:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:13,307 INFO L470 AbstractCegarLoop]: Abstraction has 56512 states and 371852 transitions. [2022-01-18 14:57:13,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 56512 states and 371852 transitions. [2022-01-18 14:57:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 14:57:13,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:13,493 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:13,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 14:57:13,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:13,694 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:13,694 INFO L85 PathProgramCache]: Analyzing trace with hash 944655902, now seen corresponding path program 51 times [2022-01-18 14:57:13,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:13,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008355734] [2022-01-18 14:57:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:13,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:57:13,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008355734] [2022-01-18 14:57:13,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008355734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803518564] [2022-01-18 14:57:13,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:57:13,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:13,728 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:13,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 14:57:13,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:57:13,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:57:13,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-18 14:57:13,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-18 14:57:13,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803518564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:13,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:13,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 3] total 10 [2022-01-18 14:57:13,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391214691] [2022-01-18 14:57:13,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:13,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:57:13,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:13,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:57:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:57:13,885 INFO L87 Difference]: Start difference. First operand 56512 states and 371852 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:16,396 INFO L93 Difference]: Finished difference Result 133141 states and 842938 transitions. [2022-01-18 14:57:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:57:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 14:57:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:17,179 INFO L225 Difference]: With dead ends: 133141 [2022-01-18 14:57:17,179 INFO L226 Difference]: Without dead ends: 119114 [2022-01-18 14:57:17,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:57:17,180 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 252 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:17,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 713 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:57:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119114 states. [2022-01-18 14:57:19,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119114 to 75311. [2022-01-18 14:57:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75311 states, 75310 states have (on average 6.663085911565529) internal successors, (501797), 75310 states have internal predecessors, (501797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75311 states to 75311 states and 501797 transitions. [2022-01-18 14:57:20,463 INFO L78 Accepts]: Start accepts. Automaton has 75311 states and 501797 transitions. Word has length 36 [2022-01-18 14:57:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:20,464 INFO L470 AbstractCegarLoop]: Abstraction has 75311 states and 501797 transitions. [2022-01-18 14:57:20,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 75311 states and 501797 transitions. [2022-01-18 14:57:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 14:57:21,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:21,267 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:21,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 14:57:21,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:21,472 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2142412865, now seen corresponding path program 52 times [2022-01-18 14:57:21,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:21,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619993476] [2022-01-18 14:57:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:21,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 14:57:21,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:21,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619993476] [2022-01-18 14:57:21,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619993476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:21,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443900924] [2022-01-18 14:57:21,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:57:21,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:21,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:21,505 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:21,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 14:57:21,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:57:21,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:57:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 14:57:21,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 14:57:21,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443900924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:21,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:21,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 12 [2022-01-18 14:57:21,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161665764] [2022-01-18 14:57:21,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:21,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:57:21,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:57:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:57:21,701 INFO L87 Difference]: Start difference. First operand 75311 states and 501797 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:23,951 INFO L93 Difference]: Finished difference Result 163605 states and 1075759 transitions. [2022-01-18 14:57:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:57:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 14:57:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:24,798 INFO L225 Difference]: With dead ends: 163605 [2022-01-18 14:57:24,799 INFO L226 Difference]: Without dead ends: 129189 [2022-01-18 14:57:24,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:57:24,799 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 429 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:24,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 399 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:57:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129189 states. [2022-01-18 14:57:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129189 to 74165. [2022-01-18 14:57:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74165 states, 74164 states have (on average 6.694851949733024) internal successors, (496517), 74164 states have internal predecessors, (496517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74165 states to 74165 states and 496517 transitions. [2022-01-18 14:57:28,712 INFO L78 Accepts]: Start accepts. Automaton has 74165 states and 496517 transitions. Word has length 37 [2022-01-18 14:57:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:28,712 INFO L470 AbstractCegarLoop]: Abstraction has 74165 states and 496517 transitions. [2022-01-18 14:57:28,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:28,712 INFO L276 IsEmpty]: Start isEmpty. Operand 74165 states and 496517 transitions. [2022-01-18 14:57:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 14:57:28,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:28,960 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:28,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 14:57:29,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:29,160 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1883617541, now seen corresponding path program 53 times [2022-01-18 14:57:29,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:29,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809209393] [2022-01-18 14:57:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:29,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 14:57:29,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:29,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809209393] [2022-01-18 14:57:29,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809209393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:29,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880186714] [2022-01-18 14:57:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:57:29,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:29,197 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:29,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 14:57:29,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:57:29,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:29,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:57:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 14:57:29,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 14:57:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880186714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:29,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:29,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-01-18 14:57:29,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416659309] [2022-01-18 14:57:29,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:29,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:57:29,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:57:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:57:29,415 INFO L87 Difference]: Start difference. First operand 74165 states and 496517 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:32,609 INFO L93 Difference]: Finished difference Result 149831 states and 983713 transitions. [2022-01-18 14:57:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:57:32,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 14:57:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:33,355 INFO L225 Difference]: With dead ends: 149831 [2022-01-18 14:57:33,355 INFO L226 Difference]: Without dead ends: 110837 [2022-01-18 14:57:33,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:57:33,356 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 327 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:33,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 564 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:57:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110837 states. [2022-01-18 14:57:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110837 to 61559. [2022-01-18 14:57:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61559 states, 61558 states have (on average 6.582458819324865) internal successors, (405203), 61558 states have internal predecessors, (405203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61559 states to 61559 states and 405203 transitions. [2022-01-18 14:57:36,511 INFO L78 Accepts]: Start accepts. Automaton has 61559 states and 405203 transitions. Word has length 37 [2022-01-18 14:57:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:36,511 INFO L470 AbstractCegarLoop]: Abstraction has 61559 states and 405203 transitions. [2022-01-18 14:57:36,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 61559 states and 405203 transitions. [2022-01-18 14:57:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 14:57:36,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:36,716 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:36,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 14:57:36,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 14:57:36,918 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1844070207, now seen corresponding path program 54 times [2022-01-18 14:57:36,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:36,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428181958] [2022-01-18 14:57:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:36,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 14:57:36,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428181958] [2022-01-18 14:57:36,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428181958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719612824] [2022-01-18 14:57:36,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:57:36,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:36,964 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:36,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 14:57:36,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:57:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:57:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-18 14:57:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-18 14:57:37,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719612824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:37,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:37,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 14 [2022-01-18 14:57:37,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528676046] [2022-01-18 14:57:37,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:37,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:57:37,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:57:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:57:37,137 INFO L87 Difference]: Start difference. First operand 61559 states and 405203 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:40,245 INFO L93 Difference]: Finished difference Result 117825 states and 739142 transitions. [2022-01-18 14:57:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 14:57:40,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 14:57:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:40,864 INFO L225 Difference]: With dead ends: 117825 [2022-01-18 14:57:40,864 INFO L226 Difference]: Without dead ends: 97872 [2022-01-18 14:57:40,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=3199, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 14:57:40,865 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 797 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:40,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 1016 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:57:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97872 states. [2022-01-18 14:57:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97872 to 66935. [2022-01-18 14:57:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66935 states, 66934 states have (on average 6.500343622075477) internal successors, (435094), 66934 states have internal predecessors, (435094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66935 states to 66935 states and 435094 transitions. [2022-01-18 14:57:43,793 INFO L78 Accepts]: Start accepts. Automaton has 66935 states and 435094 transitions. Word has length 37 [2022-01-18 14:57:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:43,793 INFO L470 AbstractCegarLoop]: Abstraction has 66935 states and 435094 transitions. [2022-01-18 14:57:43,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 66935 states and 435094 transitions. [2022-01-18 14:57:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:57:44,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:44,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:44,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 14:57:44,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-18 14:57:44,219 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2083853536, now seen corresponding path program 55 times [2022-01-18 14:57:44,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:44,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227884236] [2022-01-18 14:57:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:44,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:44,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:44,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227884236] [2022-01-18 14:57:44,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227884236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:44,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314829483] [2022-01-18 14:57:44,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:57:44,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:44,240 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:44,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 14:57:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:57:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:44,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:44,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314829483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:44,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:44,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:57:44,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983791175] [2022-01-18 14:57:44,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:44,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:57:44,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:44,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:57:44,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:57:44,383 INFO L87 Difference]: Start difference. First operand 66935 states and 435094 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:45,883 INFO L93 Difference]: Finished difference Result 111728 states and 696117 transitions. [2022-01-18 14:57:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:57:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:57:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:46,355 INFO L225 Difference]: With dead ends: 111728 [2022-01-18 14:57:46,355 INFO L226 Difference]: Without dead ends: 81803 [2022-01-18 14:57:46,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:57:46,355 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:46,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 131 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:57:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81803 states. [2022-01-18 14:57:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81803 to 66935. [2022-01-18 14:57:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66935 states, 66934 states have (on average 6.390115636298443) internal successors, (427716), 66934 states have internal predecessors, (427716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66935 states to 66935 states and 427716 transitions. [2022-01-18 14:57:49,063 INFO L78 Accepts]: Start accepts. Automaton has 66935 states and 427716 transitions. Word has length 38 [2022-01-18 14:57:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:49,063 INFO L470 AbstractCegarLoop]: Abstraction has 66935 states and 427716 transitions. [2022-01-18 14:57:49,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 66935 states and 427716 transitions. [2022-01-18 14:57:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:57:49,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:49,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:49,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 14:57:49,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 14:57:49,479 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:49,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1510049182, now seen corresponding path program 56 times [2022-01-18 14:57:49,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:49,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737942211] [2022-01-18 14:57:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:49,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:49,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737942211] [2022-01-18 14:57:49,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737942211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297845538] [2022-01-18 14:57:49,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:57:49,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:49,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:49,518 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:49,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 14:57:49,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:57:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:49,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:57:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-18 14:57:50,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297845538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:50,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:50,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:57:50,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803742558] [2022-01-18 14:57:50,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:50,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:57:50,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:57:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:57:50,181 INFO L87 Difference]: Start difference. First operand 66935 states and 427716 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:51,226 INFO L93 Difference]: Finished difference Result 104231 states and 642732 transitions. [2022-01-18 14:57:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:57:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:57:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:52,237 INFO L225 Difference]: With dead ends: 104231 [2022-01-18 14:57:52,237 INFO L226 Difference]: Without dead ends: 85380 [2022-01-18 14:57:52,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:57:52,238 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:52,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 122 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:57:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85380 states. [2022-01-18 14:57:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85380 to 59557. [2022-01-18 14:57:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59557 states, 59556 states have (on average 6.229280005373094) internal successors, (370991), 59556 states have internal predecessors, (370991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59557 states to 59557 states and 370991 transitions. [2022-01-18 14:57:54,415 INFO L78 Accepts]: Start accepts. Automaton has 59557 states and 370991 transitions. Word has length 38 [2022-01-18 14:57:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:54,416 INFO L470 AbstractCegarLoop]: Abstraction has 59557 states and 370991 transitions. [2022-01-18 14:57:54,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 59557 states and 370991 transitions. [2022-01-18 14:57:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:57:55,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:55,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:55,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 14:57:55,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:55,408 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 973042700, now seen corresponding path program 57 times [2022-01-18 14:57:55,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802173322] [2022-01-18 14:57:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:55,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:55,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802173322] [2022-01-18 14:57:55,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802173322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402592778] [2022-01-18 14:57:55,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:57:55,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:55,432 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:55,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 14:57:55,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:57:55,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:55,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:57:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:55,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:57:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:55,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402592778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:57:55,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:57:55,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:57:55,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007939318] [2022-01-18 14:57:55,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:57:55,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:57:55,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:57:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:57:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:57:55,576 INFO L87 Difference]: Start difference. First operand 59557 states and 370991 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:57:56,446 INFO L93 Difference]: Finished difference Result 89300 states and 550787 transitions. [2022-01-18 14:57:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:57:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:57:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:57:57,481 INFO L225 Difference]: With dead ends: 89300 [2022-01-18 14:57:57,481 INFO L226 Difference]: Without dead ends: 74425 [2022-01-18 14:57:57,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:57:57,482 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:57:57,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 130 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:57:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74425 states. [2022-01-18 14:57:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74425 to 55868. [2022-01-18 14:57:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55868 states, 55867 states have (on average 6.165947697209444) internal successors, (344473), 55867 states have internal predecessors, (344473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55868 states to 55868 states and 344473 transitions. [2022-01-18 14:57:59,463 INFO L78 Accepts]: Start accepts. Automaton has 55868 states and 344473 transitions. Word has length 38 [2022-01-18 14:57:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:57:59,463 INFO L470 AbstractCegarLoop]: Abstraction has 55868 states and 344473 transitions. [2022-01-18 14:57:59,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:57:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 55868 states and 344473 transitions. [2022-01-18 14:57:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:57:59,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:57:59,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:57:59,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 14:57:59,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:59,839 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:57:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:57:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash 580015690, now seen corresponding path program 58 times [2022-01-18 14:57:59,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:57:59,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864152486] [2022-01-18 14:57:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:57:59,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:57:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:57:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:59,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:57:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864152486] [2022-01-18 14:57:59,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864152486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:57:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761320195] [2022-01-18 14:57:59,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:57:59,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:57:59,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:57:59,865 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:57:59,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 14:57:59,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:57:59,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:57:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:57:59,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:57:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:57:59,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:58:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:58:00,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761320195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:58:00,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:58:00,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:58:00,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442696761] [2022-01-18 14:58:00,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:58:00,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:58:00,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:58:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:58:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:58:00,017 INFO L87 Difference]: Start difference. First operand 55868 states and 344473 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:58:01,259 INFO L93 Difference]: Finished difference Result 78177 states and 482076 transitions. [2022-01-18 14:58:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:58:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:58:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:58:01,646 INFO L225 Difference]: With dead ends: 78177 [2022-01-18 14:58:01,646 INFO L226 Difference]: Without dead ends: 70624 [2022-01-18 14:58:01,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:58:01,646 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:58:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 104 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:58:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70624 states. [2022-01-18 14:58:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70624 to 63246. [2022-01-18 14:58:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63246 states, 63245 states have (on average 6.168566685113448) internal successors, (390131), 63245 states have internal predecessors, (390131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63246 states to 63246 states and 390131 transitions. [2022-01-18 14:58:04,169 INFO L78 Accepts]: Start accepts. Automaton has 63246 states and 390131 transitions. Word has length 38 [2022-01-18 14:58:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:58:04,169 INFO L470 AbstractCegarLoop]: Abstraction has 63246 states and 390131 transitions. [2022-01-18 14:58:04,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 63246 states and 390131 transitions. [2022-01-18 14:58:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:58:04,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:58:04,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:58:04,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 14:58:04,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 14:58:04,571 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:58:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:58:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash 460340691, now seen corresponding path program 59 times [2022-01-18 14:58:04,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:58:04,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700096066] [2022-01-18 14:58:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:58:04,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:58:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:58:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-18 14:58:04,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:58:04,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700096066] [2022-01-18 14:58:04,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700096066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:58:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031400965] [2022-01-18 14:58:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:58:04,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:58:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:58:04,620 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:58:04,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 14:58:04,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:58:04,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:58:04,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:58:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:58:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-18 14:58:04,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:58:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-18 14:58:05,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031400965] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:58:05,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:58:05,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 10 [2022-01-18 14:58:05,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587523265] [2022-01-18 14:58:05,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:58:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:58:05,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:58:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:58:05,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:58:05,074 INFO L87 Difference]: Start difference. First operand 63246 states and 390131 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:58:06,711 INFO L93 Difference]: Finished difference Result 105877 states and 653832 transitions. [2022-01-18 14:58:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:58:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:58:06,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:58:07,787 INFO L225 Difference]: With dead ends: 105877 [2022-01-18 14:58:07,787 INFO L226 Difference]: Without dead ends: 104850 [2022-01-18 14:58:07,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:58:07,788 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 131 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:58:07,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 322 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:58:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104850 states. [2022-01-18 14:58:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104850 to 91505. [2022-01-18 14:58:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91505 states, 91504 states have (on average 6.320248295156496) internal successors, (578328), 91504 states have internal predecessors, (578328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91505 states to 91505 states and 578328 transitions. [2022-01-18 14:58:11,403 INFO L78 Accepts]: Start accepts. Automaton has 91505 states and 578328 transitions. Word has length 39 [2022-01-18 14:58:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:58:11,403 INFO L470 AbstractCegarLoop]: Abstraction has 91505 states and 578328 transitions. [2022-01-18 14:58:11,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 91505 states and 578328 transitions. [2022-01-18 14:58:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:58:11,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:58:11,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:58:11,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 14:58:11,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 14:58:11,923 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:58:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:58:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash -884303883, now seen corresponding path program 60 times [2022-01-18 14:58:11,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:58:11,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918475574] [2022-01-18 14:58:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:58:11,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:58:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:58:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-18 14:58:11,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:58:11,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918475574] [2022-01-18 14:58:11,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918475574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:58:11,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334297711] [2022-01-18 14:58:11,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:58:11,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:58:11,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:58:11,972 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:58:11,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 14:58:12,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:58:12,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:58:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:58:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:58:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:58:12,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:58:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-18 14:58:12,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334297711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:58:12,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:58:12,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2022-01-18 14:58:12,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013147391] [2022-01-18 14:58:12,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:58:12,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:58:12,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:58:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:58:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:58:12,756 INFO L87 Difference]: Start difference. First operand 91505 states and 578328 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 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 14:58:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:58:17,470 INFO L93 Difference]: Finished difference Result 260901 states and 1637289 transitions. [2022-01-18 14:58:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 14:58:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:58:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:58:20,102 INFO L225 Difference]: With dead ends: 260901 [2022-01-18 14:58:20,102 INFO L226 Difference]: Without dead ends: 251186 [2022-01-18 14:58:20,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:58:20,103 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 412 mSDsluCounter, 2496 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:58:20,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 1295 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:58:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251186 states. [2022-01-18 14:58:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251186 to 166534. [2022-01-18 14:58:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166534 states, 166533 states have (on average 6.728450217074093) internal successors, (1120509), 166533 states have internal predecessors, (1120509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166534 states to 166534 states and 1120509 transitions. [2022-01-18 14:58:29,732 INFO L78 Accepts]: Start accepts. Automaton has 166534 states and 1120509 transitions. Word has length 39 [2022-01-18 14:58:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:58:29,733 INFO L470 AbstractCegarLoop]: Abstraction has 166534 states and 1120509 transitions. [2022-01-18 14:58:29,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 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 14:58:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 166534 states and 1120509 transitions. [2022-01-18 14:58:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:58:30,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:58:30,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:58:30,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 14:58:30,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:58:30,816 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:58:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:58:30,816 INFO L85 PathProgramCache]: Analyzing trace with hash -74024473, now seen corresponding path program 61 times [2022-01-18 14:58:30,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:58:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879196426] [2022-01-18 14:58:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:58:30,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:58:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:58:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-18 14:58:30,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:58:30,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879196426] [2022-01-18 14:58:30,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879196426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:58:30,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142768390] [2022-01-18 14:58:30,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:58:30,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:58:30,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:58:30,890 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:58:30,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 14:58:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:58:30,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:58:30,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:58:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-18 14:58:31,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:58:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-18 14:58:31,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142768390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:58:31,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:58:31,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 14 [2022-01-18 14:58:31,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986652577] [2022-01-18 14:58:31,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:58:31,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:58:31,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:58:31,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:58:31,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:58:31,853 INFO L87 Difference]: Start difference. First operand 166534 states and 1120509 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:58:39,669 INFO L93 Difference]: Finished difference Result 389347 states and 2531806 transitions. [2022-01-18 14:58:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 14:58:39,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:58:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:58:43,207 INFO L225 Difference]: With dead ends: 389347 [2022-01-18 14:58:43,207 INFO L226 Difference]: Without dead ends: 363171 [2022-01-18 14:58:43,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 14:58:43,207 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 655 mSDsluCounter, 4195 mSDsCounter, 0 mSdLazyCounter, 4113 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 4209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 4113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:58:43,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 2273 Invalid, 4209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 4113 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 14:58:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363171 states. [2022-01-18 14:58:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363171 to 216205. [2022-01-18 14:58:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216205 states, 216204 states have (on average 6.976471295628203) internal successors, (1508341), 216204 states have internal predecessors, (1508341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216205 states to 216205 states and 1508341 transitions. [2022-01-18 14:58:56,530 INFO L78 Accepts]: Start accepts. Automaton has 216205 states and 1508341 transitions. Word has length 39 [2022-01-18 14:58:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:58:56,530 INFO L470 AbstractCegarLoop]: Abstraction has 216205 states and 1508341 transitions. [2022-01-18 14:58:56,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:58:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 216205 states and 1508341 transitions. [2022-01-18 14:58:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:58:58,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:58:58,003 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:58:58,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 14:58:58,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 14:58:58,204 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:58:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:58:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -517660847, now seen corresponding path program 62 times [2022-01-18 14:58:58,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:58:58,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502495543] [2022-01-18 14:58:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:58:58,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:58:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:58:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-18 14:58:58,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:58:58,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502495543] [2022-01-18 14:58:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502495543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:58:58,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119797861] [2022-01-18 14:58:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:58:58,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:58:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:58:58,252 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:58:58,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 14:58:58,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:58:58,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:58:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:58:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:58:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-18 14:58:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:58:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-18 14:58:59,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119797861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:58:59,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:58:59,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 13 [2022-01-18 14:58:59,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836752922] [2022-01-18 14:58:59,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:58:59,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:58:59,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:58:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:58:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:58:59,022 INFO L87 Difference]: Start difference. First operand 216205 states and 1508341 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:59:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:59:04,769 INFO L93 Difference]: Finished difference Result 315458 states and 2162733 transitions. [2022-01-18 14:59:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:59:04,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:59:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:59:07,804 INFO L225 Difference]: With dead ends: 315458 [2022-01-18 14:59:07,804 INFO L226 Difference]: Without dead ends: 311710 [2022-01-18 14:59:07,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:59:07,805 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 177 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:59:07,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 578 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:59:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311710 states. [2022-01-18 14:59:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311710 to 244285. [2022-01-18 14:59:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244285 states, 244284 states have (on average 7.047579866057539) internal successors, (1721611), 244284 states have internal predecessors, (1721611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:59:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244285 states to 244285 states and 1721611 transitions. [2022-01-18 14:59:22,182 INFO L78 Accepts]: Start accepts. Automaton has 244285 states and 1721611 transitions. Word has length 39 [2022-01-18 14:59:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:59:22,183 INFO L470 AbstractCegarLoop]: Abstraction has 244285 states and 1721611 transitions. [2022-01-18 14:59:22,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:59:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 244285 states and 1721611 transitions. [2022-01-18 14:59:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:59:23,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:59:23,711 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:59:23,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 14:59:23,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 14:59:23,927 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 14:59:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:59:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1282412483, now seen corresponding path program 63 times [2022-01-18 14:59:23,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:59:23,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70583172] [2022-01-18 14:59:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:59:23,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:59:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:59:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-18 14:59:23,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:59:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70583172] [2022-01-18 14:59:23,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70583172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:59:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378520458] [2022-01-18 14:59:23,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:59:23,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:59:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:59:23,982 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:59:23,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 14:59:24,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:59:24,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:59:24,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:59:24,034 INFO L286 TraceCheckSpWp]: Computing forward predicates...