/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:54:54,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:54:54,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:54:54,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-03 19:54:54,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-03 19:54:54,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-03 19:54:54,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-03 19:54:54,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-03 19:54:54,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-03 19:54:54,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-03 19:54:54,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-03 19:54:54,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-03 19:54:54,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-03 19:54:54,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-03 19:54:54,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-03 19:54:54,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-03 19:54:54,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-03 19:54:54,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-03 19:54:54,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-03 19:54:54,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-03 19:54:54,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-03 19:54:54,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-03 19:54:54,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-03 19:54:54,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-03 19:54:54,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-03 19:54:54,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-03 19:54:54,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-03 19:54:54,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-03 19:54:54,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-03 19:54:54,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-03 19:54:54,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-03 19:54:54,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-03 19:54:54,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-03 19:54:54,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-03 19:54:54,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-03 19:54:54,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-03 19:54:54,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-03 19:54:54,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-03 19:54:54,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:54:54,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:54:54,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:54:54,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:54:54,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:54:54,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:54:54,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:54:54,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:54:54,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:54:54,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:54:54,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:54:54,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:54:54,893 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:54:54,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:54:54,893 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:54:54,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:54:54,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:54:54,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:54:54,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:54:54,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:54:54,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:54:54,894 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:54:54,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:54:54,894 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:54:54,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:54:54,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:54:54,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:54:54,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:54:54,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:54:54,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:54:54,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:54:54,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:54:54,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:54:54,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:54:54,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:54:54,896 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:54:54,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:54:54,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:54:55,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:54:55,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:54:55,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:54:55,104 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:54:55,105 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:54:55,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl [2022-03-03 19:54:55,106 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl' [2022-03-03 19:54:55,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:54:55,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:54:55,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:54:55,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:54:55,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:54:55,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,160 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:54:55,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:54:55,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:54:55,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:54:55,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:54:55,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:54:55,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:54:55,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:54:55,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:54:55,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/1) ... [2022-03-03 19:54:55,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:54:55,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:55,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:54:55,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:54:55,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:54:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:54:55,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:54:55,227 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:54:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:54:55,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:54:55,227 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:54:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:54:55,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:54:55,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:54:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:54:55,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:54:55,230 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:54:55,267 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:54:55,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:54:55,376 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:54:55,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:54:55,396 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:54:55,397 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:54:55 BoogieIcfgContainer [2022-03-03 19:54:55,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:54:55,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:54:55,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:54:55,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:54:55,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:54:55" (1/2) ... [2022-03-03 19:54:55,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de73e1d and model type dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:54:55, skipping insertion in model container [2022-03-03 19:54:55,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:54:55" (2/2) ... [2022-03-03 19:54:55,414 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product.wvr.bpl [2022-03-03 19:54:55,417 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:54:55,417 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:54:55,417 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:54:55,417 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:54:55,453 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:54:55,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:54:55,514 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:54:55,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:54:55,525 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-03 19:54:55,567 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:54:55,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:55,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:55,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash -798073446, now seen corresponding path program 1 times [2022-03-03 19:54:55,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:55,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244039910] [2022-03-03 19:54:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:55,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:55,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:55,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244039910] [2022-03-03 19:54:55,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244039910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:54:55,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:54:55,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:54:55,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417603155] [2022-03-03 19:54:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:54:55,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:54:55,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:54:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:54:55,777 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:55,823 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-03 19:54:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:54:55,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:54:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:55,832 INFO L225 Difference]: With dead ends: 217 [2022-03-03 19:54:55,832 INFO L226 Difference]: Without dead ends: 202 [2022-03-03 19:54:55,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:54:55,836 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:55,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:54:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-03 19:54:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-03 19:54:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-03 19:54:55,895 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-03 19:54:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:55,896 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-03 19:54:55,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-03 19:54:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:54:55,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:55,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:55,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:54:55,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 216086682, now seen corresponding path program 1 times [2022-03-03 19:54:55,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:55,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610608736] [2022-03-03 19:54:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:54:55,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:55,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610608736] [2022-03-03 19:54:55,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610608736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:54:55,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:54:55,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:54:55,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195352982] [2022-03-03 19:54:55,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:54:55,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:54:55,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:54:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:54:55,944 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:55,982 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-03 19:54:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:54:55,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:54:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:55,984 INFO L225 Difference]: With dead ends: 158 [2022-03-03 19:54:55,984 INFO L226 Difference]: Without dead ends: 158 [2022-03-03 19:54:55,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:54:55,985 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:55,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:54:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-03 19:54:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-03 19:54:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-03 19:54:55,996 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-03 19:54:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:55,997 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-03 19:54:55,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-03 19:54:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:54:55,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:55,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:55,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:54:55,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash 924693880, now seen corresponding path program 1 times [2022-03-03 19:54:55,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:55,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807070071] [2022-03-03 19:54:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:55,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:54:56,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:56,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807070071] [2022-03-03 19:54:56,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807070071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:54:56,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:54:56,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:54:56,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137174875] [2022-03-03 19:54:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:54:56,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:54:56,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:54:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:54:56,041 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:56,085 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-03 19:54:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:54:56,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:54:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:56,088 INFO L225 Difference]: With dead ends: 183 [2022-03-03 19:54:56,088 INFO L226 Difference]: Without dead ends: 183 [2022-03-03 19:54:56,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:54:56,089 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:56,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:54:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-03 19:54:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-03 19:54:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-03 19:54:56,099 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-03 19:54:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:56,100 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-03 19:54:56,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-03 19:54:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:54:56,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:56,101 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] [2022-03-03 19:54:56,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:54:56,101 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash 575000696, now seen corresponding path program 1 times [2022-03-03 19:54:56,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:56,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438822877] [2022-03-03 19:54:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:56,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:56,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438822877] [2022-03-03 19:54:56,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438822877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:56,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157140880] [2022-03-03 19:54:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:56,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:56,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:56,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:56,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:54:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:56,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:54:56,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:56,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-03-03 19:54:56,702 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-03 19:54:56,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2022-03-03 19:54:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:56,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:56,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:56,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:54:56,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:56,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:54:56,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:56,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:54:56,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:54:56,902 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:54:56,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-03 19:54:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:57,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157140880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:57,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:57,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:54:57,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394334281] [2022-03-03 19:54:57,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:57,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:54:57,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:54:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:54:57,002 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:57,223 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-03 19:54:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:54:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:54:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:57,226 INFO L225 Difference]: With dead ends: 366 [2022-03-03 19:54:57,226 INFO L226 Difference]: Without dead ends: 351 [2022-03-03 19:54:57,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:54:57,227 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:57,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:54:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-03 19:54:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-03 19:54:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-03 19:54:57,237 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-03 19:54:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:57,237 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-03 19:54:57,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-03 19:54:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:54:57,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:57,239 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] [2022-03-03 19:54:57,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:57,459 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 [2022-03-03 19:54:57,459 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 407191604, now seen corresponding path program 2 times [2022-03-03 19:54:57,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:57,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730863257] [2022-03-03 19:54:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:57,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:57,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:57,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730863257] [2022-03-03 19:54:57,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730863257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:57,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697547576] [2022-03-03 19:54:57,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:57,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:57,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:54:57,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:57,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:54:57,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:57,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:57,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-03-03 19:54:57,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:57,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:54:57,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:57,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-03 19:54:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:57,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:57,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:57,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:54:57,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:57,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:54:58,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:58,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:54:58,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:54:58,035 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:54:58,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-03 19:54:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:58,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697547576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:58,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:58,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-03-03 19:54:58,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502394885] [2022-03-03 19:54:58,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:58,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:54:58,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:54:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:54:58,115 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:58,684 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-03 19:54:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:54:58,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:54:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:58,687 INFO L225 Difference]: With dead ends: 478 [2022-03-03 19:54:58,687 INFO L226 Difference]: Without dead ends: 463 [2022-03-03 19:54:58,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:54:58,688 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:58,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 97 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:54:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-03 19:54:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-03 19:54:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-03 19:54:58,705 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-03 19:54:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:58,706 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-03 19:54:58,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-03 19:54:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:54:58,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:58,707 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] [2022-03-03 19:54:58,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:58,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:58,920 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash 705965052, now seen corresponding path program 3 times [2022-03-03 19:54:58,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:58,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412150783] [2022-03-03 19:54:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:59,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:59,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412150783] [2022-03-03 19:54:59,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412150783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:59,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323208181] [2022-03-03 19:54:59,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:54:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:59,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:59,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:54:59,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:54:59,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:59,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:54:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:59,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-03 19:54:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:59,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:59,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:59,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:54:59,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:59,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:54:59,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:59,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:54:59,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:54:59,431 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:54:59,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-03 19:54:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:59,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323208181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:59,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:59,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:54:59,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886806928] [2022-03-03 19:54:59,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:59,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:54:59,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:54:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:54:59,526 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:59,780 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-03-03 19:54:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:54:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:54:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:59,783 INFO L225 Difference]: With dead ends: 418 [2022-03-03 19:54:59,783 INFO L226 Difference]: Without dead ends: 403 [2022-03-03 19:54:59,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:54:59,784 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:59,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 86 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:54:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-03 19:54:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-03-03 19:54:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-03 19:54:59,791 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-03 19:54:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:59,791 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-03 19:54:59,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-03 19:54:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:54:59,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:59,792 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] [2022-03-03 19:54:59,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:00,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:00,011 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2018176644, now seen corresponding path program 4 times [2022-03-03 19:55:00,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:00,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61628385] [2022-03-03 19:55:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:00,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:00,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:00,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61628385] [2022-03-03 19:55:00,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61628385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:00,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162207581] [2022-03-03 19:55:00,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:00,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:00,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:00,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:55:00,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:00,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:00,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:55:00,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:00,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:00,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-03-03 19:55:00,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:00,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-03-03 19:55:00,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:00,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-03 19:55:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:00,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:00,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:00,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:55:00,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:00,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:55:00,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:00,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:55:00,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:55:00,584 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:55:00,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-03 19:55:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:00,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162207581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:00,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:00,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:55:00,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660704662] [2022-03-03 19:55:00,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:00,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:55:00,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:55:00,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:00,674 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-03-03 19:55:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:00,859 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-03 19:55:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:55:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 22 [2022-03-03 19:55:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:00,860 INFO L225 Difference]: With dead ends: 381 [2022-03-03 19:55:00,861 INFO L226 Difference]: Without dead ends: 366 [2022-03-03 19:55:00,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:55:00,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:00,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 94 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-03-03 19:55:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-03 19:55:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-03 19:55:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-03 19:55:00,867 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-03 19:55:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:00,867 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-03 19:55:00,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-03-03 19:55:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-03 19:55:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:55:00,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:00,868 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] [2022-03-03 19:55:00,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:01,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:01,079 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 29371358, now seen corresponding path program 5 times [2022-03-03 19:55:01,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:01,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777448563] [2022-03-03 19:55:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:01,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:01,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:01,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777448563] [2022-03-03 19:55:01,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777448563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:01,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998649069] [2022-03-03 19:55:01,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:01,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:01,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:01,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:01,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:55:01,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:01,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:01,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:55:01,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:01,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:01,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2022-03-03 19:55:01,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:01,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 61 [2022-03-03 19:55:01,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:01,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-03 19:55:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:01,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:01,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:01,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:55:01,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:01,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:55:01,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:01,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:55:01,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:55:01,733 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:55:01,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-03 19:55:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:01,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998649069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:01,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:01,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-03 19:55:01,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410404369] [2022-03-03 19:55:01,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:01,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:55:01,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:55:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:55:01,857 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:06,308 INFO L93 Difference]: Finished difference Result 1134 states and 3376 transitions. [2022-03-03 19:55:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 19:55:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:55:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:06,313 INFO L225 Difference]: With dead ends: 1134 [2022-03-03 19:55:06,313 INFO L226 Difference]: Without dead ends: 1119 [2022-03-03 19:55:06,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2044, Invalid=7856, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 19:55:06,315 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 547 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:06,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 238 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 691 Invalid, 0 Unknown, 372 Unchecked, 0.5s Time] [2022-03-03 19:55:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-03 19:55:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 261. [2022-03-03 19:55:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-03-03 19:55:06,326 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-03-03 19:55:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:06,327 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-03-03 19:55:06,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-03-03 19:55:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:55:06,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:06,333 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] [2022-03-03 19:55:06,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:06,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:06,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1593497758, now seen corresponding path program 6 times [2022-03-03 19:55:06,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:06,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200056528] [2022-03-03 19:55:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:06,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:06,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200056528] [2022-03-03 19:55:06,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200056528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:06,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430347312] [2022-03-03 19:55:06,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:06,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:06,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:06,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:06,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:55:06,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:55:06,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:55:06,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:06,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:06,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-03-03 19:55:06,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:06,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-03-03 19:55:06,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:06,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-03 19:55:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:06,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:07,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:07,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:55:07,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:07,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:55:07,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:07,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:55:07,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:55:07,094 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:55:07,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-03 19:55:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:07,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430347312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:07,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:07,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-03 19:55:07,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724887997] [2022-03-03 19:55:07,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:07,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:55:07,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:55:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:55:07,191 INFO L87 Difference]: Start difference. First operand 261 states and 785 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:07,879 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-03-03 19:55:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:55:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 22 [2022-03-03 19:55:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:07,882 INFO L225 Difference]: With dead ends: 585 [2022-03-03 19:55:07,882 INFO L226 Difference]: Without dead ends: 570 [2022-03-03 19:55:07,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:55:07,883 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:07,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-03 19:55:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-03-03 19:55:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-03-03 19:55:07,889 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-03-03 19:55:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:07,889 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-03-03 19:55:07,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-03-03 19:55:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:07,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:07,890 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] [2022-03-03 19:55:07,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-03 19:55:08,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:08,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1804181270, now seen corresponding path program 7 times [2022-03-03 19:55:08,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:08,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283452981] [2022-03-03 19:55:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:08,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:08,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:08,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283452981] [2022-03-03 19:55:08,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283452981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:08,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979827990] [2022-03-03 19:55:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:08,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:08,154 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:08,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:55:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:08,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:08,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:08,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:08,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979827990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:08,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:08,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:55:08,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352077474] [2022-03-03 19:55:08,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:08,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:55:08,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:55:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:55:08,359 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:09,120 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-03-03 19:55:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:55:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:09,125 INFO L225 Difference]: With dead ends: 1123 [2022-03-03 19:55:09,125 INFO L226 Difference]: Without dead ends: 1123 [2022-03-03 19:55:09,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:55:09,126 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:09,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 200 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-03 19:55:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-03-03 19:55:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-03-03 19:55:09,137 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-03-03 19:55:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:09,138 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-03-03 19:55:09,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-03-03 19:55:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:09,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:09,139 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] [2022-03-03 19:55:09,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:09,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:09,355 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash 827862426, now seen corresponding path program 8 times [2022-03-03 19:55:09,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:09,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046174066] [2022-03-03 19:55:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:09,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:09,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046174066] [2022-03-03 19:55:09,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046174066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:09,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629902248] [2022-03-03 19:55:09,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:09,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:09,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:09,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:55:09,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:09,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:09,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:09,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629902248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:09,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:09,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:55:09,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247186926] [2022-03-03 19:55:09,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:09,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:55:09,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:55:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:55:09,603 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:11,361 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-03-03 19:55:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 19:55:11,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:11,368 INFO L225 Difference]: With dead ends: 1814 [2022-03-03 19:55:11,368 INFO L226 Difference]: Without dead ends: 1814 [2022-03-03 19:55:11,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:55:11,371 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 482 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:11,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 328 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:55:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-03-03 19:55:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-03-03 19:55:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-03 19:55:11,389 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-03 19:55:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:11,389 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-03 19:55:11,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-03 19:55:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:11,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:11,391 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] [2022-03-03 19:55:11,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-03 19:55:11,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-03 19:55:11,606 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1394814506, now seen corresponding path program 9 times [2022-03-03 19:55:11,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:11,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496677435] [2022-03-03 19:55:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:11,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:11,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496677435] [2022-03-03 19:55:11,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496677435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:11,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788203899] [2022-03-03 19:55:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:11,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:11,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:11,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:11,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:55:11,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:55:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:11,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:11,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788203899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:11,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:11,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:55:11,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797519232] [2022-03-03 19:55:11,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:11,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:55:11,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:55:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:55:11,860 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:12,757 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-03 19:55:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:55:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:12,764 INFO L225 Difference]: With dead ends: 1470 [2022-03-03 19:55:12,765 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 19:55:12,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:55:12,769 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 363 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:12,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 275 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:55:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 19:55:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-03 19:55:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-03 19:55:12,780 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-03 19:55:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:12,780 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-03 19:55:12,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-03 19:55:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:12,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:12,781 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] [2022-03-03 19:55:12,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:12,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:12,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1964014118, now seen corresponding path program 1 times [2022-03-03 19:55:12,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:12,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543647038] [2022-03-03 19:55:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:12,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:13,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:13,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543647038] [2022-03-03 19:55:13,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543647038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:13,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438462724] [2022-03-03 19:55:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:13,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:13,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:55:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:55:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:13,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:13,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438462724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:13,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:13,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:55:13,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215485698] [2022-03-03 19:55:13,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:13,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:55:13,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:55:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:55:13,180 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:13,314 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-03 19:55:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:55:13,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:13,317 INFO L225 Difference]: With dead ends: 685 [2022-03-03 19:55:13,317 INFO L226 Difference]: Without dead ends: 679 [2022-03-03 19:55:13,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:13,318 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:13,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 39 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-03 19:55:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-03 19:55:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-03 19:55:13,327 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-03 19:55:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:13,327 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-03 19:55:13,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-03 19:55:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:13,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:13,328 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] [2022-03-03 19:55:13,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:13,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:55:13,547 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1893984470, now seen corresponding path program 10 times [2022-03-03 19:55:13,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:13,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313758723] [2022-03-03 19:55:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:13,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:13,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313758723] [2022-03-03 19:55:13,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313758723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:13,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154950425] [2022-03-03 19:55:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:13,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:13,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:13,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:55:13,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:13,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:13,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154950425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:13,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:13,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:55:13,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460468844] [2022-03-03 19:55:13,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:13,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:55:13,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:55:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:55:13,768 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-03-03 19:55:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:14,040 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-03 19:55:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:55:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 [2022-03-03 19:55:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:14,048 INFO L225 Difference]: With dead ends: 1159 [2022-03-03 19:55:14,048 INFO L226 Difference]: Without dead ends: 1111 [2022-03-03 19:55:14,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:14,048 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 284 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:14,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 110 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-03 19:55:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-03 19:55:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-03 19:55:14,062 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-03 19:55:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:14,063 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-03 19:55:14,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-03-03 19:55:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-03 19:55:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:14,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:14,066 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] [2022-03-03 19:55:14,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:14,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:55:14,279 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1188027138, now seen corresponding path program 2 times [2022-03-03 19:55:14,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:14,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366632960] [2022-03-03 19:55:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:14,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:14,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366632960] [2022-03-03 19:55:14,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366632960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:14,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176702913] [2022-03-03 19:55:14,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:14,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:14,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:14,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:55:14,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:14,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:14,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:55:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:14,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:14,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176702913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:14,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:14,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:55:14,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871986093] [2022-03-03 19:55:14,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:14,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:55:14,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:55:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:55:14,450 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:14,648 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-03 19:55:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:55:14,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:14,653 INFO L225 Difference]: With dead ends: 1267 [2022-03-03 19:55:14,653 INFO L226 Difference]: Without dead ends: 1267 [2022-03-03 19:55:14,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:55:14,654 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:14,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 66 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-03 19:55:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-03 19:55:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-03 19:55:14,671 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-03 19:55:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:14,671 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-03 19:55:14,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-03 19:55:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:14,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:14,672 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] [2022-03-03 19:55:14,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:14,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:55:14,882 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:14,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:14,882 INFO L85 PathProgramCache]: Analyzing trace with hash -158654428, now seen corresponding path program 11 times [2022-03-03 19:55:14,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:14,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071195554] [2022-03-03 19:55:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:14,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:14,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:14,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071195554] [2022-03-03 19:55:14,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071195554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:14,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719992311] [2022-03-03 19:55:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:14,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:14,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:14,927 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:14,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:55:14,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:14,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:15,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:15,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719992311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:15,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:15,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:55:15,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433529556] [2022-03-03 19:55:15,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:15,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:55:15,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:55:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:55:15,126 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:15,620 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-03 19:55:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:55:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:15,629 INFO L225 Difference]: With dead ends: 2268 [2022-03-03 19:55:15,629 INFO L226 Difference]: Without dead ends: 2268 [2022-03-03 19:55:15,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:55:15,630 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:15,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 165 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-03 19:55:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-03 19:55:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-03 19:55:15,657 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-03 19:55:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:15,658 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-03 19:55:15,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-03 19:55:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:15,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:15,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:15,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:15,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:55:15,873 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash 626259666, now seen corresponding path program 12 times [2022-03-03 19:55:15,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:15,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379887433] [2022-03-03 19:55:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:15,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:15,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379887433] [2022-03-03 19:55:15,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379887433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:15,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431328207] [2022-03-03 19:55:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:15,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:15,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:15,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:55:15,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:55:15,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:15,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:16,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:16,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431328207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:16,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:16,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:55:16,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164531592] [2022-03-03 19:55:16,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:16,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:55:16,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:16,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:55:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:55:16,088 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:16,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:16,651 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-03 19:55:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:55:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:16,660 INFO L225 Difference]: With dead ends: 2256 [2022-03-03 19:55:16,660 INFO L226 Difference]: Without dead ends: 2256 [2022-03-03 19:55:16,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:55:16,661 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:16,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 154 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-03 19:55:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-03 19:55:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-03 19:55:16,690 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-03 19:55:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:16,690 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-03 19:55:16,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-03 19:55:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:16,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:16,692 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] [2022-03-03 19:55:16,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:16,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:16,903 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1014315128, now seen corresponding path program 13 times [2022-03-03 19:55:16,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:16,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492932425] [2022-03-03 19:55:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:16,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:16,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492932425] [2022-03-03 19:55:16,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492932425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:16,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310447033] [2022-03-03 19:55:16,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:16,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:16,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:16,947 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:16,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:55:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310447033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:17,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:17,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 19:55:17,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351962551] [2022-03-03 19:55:17,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:17,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:55:17,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:55:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:55:17,092 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:17,336 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-03 19:55:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:55:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:17,343 INFO L225 Difference]: With dead ends: 1611 [2022-03-03 19:55:17,343 INFO L226 Difference]: Without dead ends: 1611 [2022-03-03 19:55:17,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:55:17,344 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 217 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:17,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 110 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-03 19:55:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-03 19:55:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-03 19:55:17,364 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-03 19:55:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:17,364 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-03 19:55:17,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-03 19:55:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:17,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:17,366 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] [2022-03-03 19:55:17,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:55:17,582 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 581438524, now seen corresponding path program 14 times [2022-03-03 19:55:17,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:17,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553416200] [2022-03-03 19:55:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:17,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:17,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553416200] [2022-03-03 19:55:17,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553416200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:17,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003476640] [2022-03-03 19:55:17,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:17,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:17,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:17,649 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:17,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:55:17,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:17,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003476640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:17,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:17,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:55:17,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851183595] [2022-03-03 19:55:17,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:17,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:55:17,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:55:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:55:17,837 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:18,331 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-03 19:55:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:55:18,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:18,337 INFO L225 Difference]: With dead ends: 2408 [2022-03-03 19:55:18,337 INFO L226 Difference]: Without dead ends: 2404 [2022-03-03 19:55:18,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:55:18,338 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:18,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 168 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-03 19:55:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-03 19:55:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-03 19:55:18,366 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-03 19:55:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:18,366 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-03 19:55:18,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-03 19:55:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:18,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:18,368 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] [2022-03-03 19:55:18,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:18,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:18,584 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 716068860, now seen corresponding path program 15 times [2022-03-03 19:55:18,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:18,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976038389] [2022-03-03 19:55:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:18,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:18,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976038389] [2022-03-03 19:55:18,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976038389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:18,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148330582] [2022-03-03 19:55:18,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:18,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:18,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:18,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:18,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:55:18,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:55:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:18,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:18,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:18,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148330582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:18,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:18,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:55:18,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906177209] [2022-03-03 19:55:18,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:18,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:55:18,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:55:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:18,809 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:19,674 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-03 19:55:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:55:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:19,682 INFO L225 Difference]: With dead ends: 3509 [2022-03-03 19:55:19,682 INFO L226 Difference]: Without dead ends: 3509 [2022-03-03 19:55:19,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:55:19,684 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 571 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:19,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 240 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-03 19:55:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-03 19:55:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-03 19:55:19,724 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-03 19:55:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:19,724 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-03 19:55:19,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-03 19:55:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:19,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:19,727 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] [2022-03-03 19:55:19,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:19,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:19,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1935859282, now seen corresponding path program 16 times [2022-03-03 19:55:19,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:19,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963758787] [2022-03-03 19:55:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:19,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:19,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963758787] [2022-03-03 19:55:19,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963758787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:19,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715315240] [2022-03-03 19:55:19,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:19,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:19,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:19,978 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:19,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:55:20,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:20,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:20,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715315240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:20,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:20,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:55:20,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711604113] [2022-03-03 19:55:20,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:20,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:55:20,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:55:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:20,154 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:21,307 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-03 19:55:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:55:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:21,315 INFO L225 Difference]: With dead ends: 3211 [2022-03-03 19:55:21,315 INFO L226 Difference]: Without dead ends: 3207 [2022-03-03 19:55:21,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:55:21,316 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 512 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:21,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 251 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:55:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-03 19:55:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-03 19:55:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-03 19:55:21,356 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-03 19:55:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:21,356 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-03 19:55:21,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-03 19:55:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:21,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:21,358 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] [2022-03-03 19:55:21,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:55:21,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:21,571 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1446822462, now seen corresponding path program 3 times [2022-03-03 19:55:21,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:21,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314156287] [2022-03-03 19:55:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:21,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:21,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:21,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314156287] [2022-03-03 19:55:21,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314156287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:21,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460635026] [2022-03-03 19:55:21,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:21,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:21,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:21,609 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:21,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:55:21,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:55:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:55:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:21,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:21,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460635026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:21,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:21,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 19:55:21,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778081250] [2022-03-03 19:55:21,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:21,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:55:21,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:55:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:55:21,753 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:21,870 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-03 19:55:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:55:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:21,874 INFO L225 Difference]: With dead ends: 1333 [2022-03-03 19:55:21,874 INFO L226 Difference]: Without dead ends: 1333 [2022-03-03 19:55:21,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:55:21,874 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:21,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-03 19:55:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-03 19:55:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-03 19:55:21,893 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-03 19:55:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:21,893 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-03 19:55:21,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-03 19:55:21,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:21,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:21,895 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] [2022-03-03 19:55:21,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:22,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:22,111 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1917945090, now seen corresponding path program 17 times [2022-03-03 19:55:22,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:22,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352899295] [2022-03-03 19:55:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:22,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:22,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352899295] [2022-03-03 19:55:22,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352899295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:22,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784697031] [2022-03-03 19:55:22,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:22,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:22,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:22,148 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:22,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:55:22,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:22,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:22,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:22,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:22,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784697031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:22,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:22,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:55:22,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123358505] [2022-03-03 19:55:22,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:22,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:55:22,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:55:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:55:22,280 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:22,610 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-03 19:55:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:55:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:22,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:22,617 INFO L225 Difference]: With dead ends: 2129 [2022-03-03 19:55:22,617 INFO L226 Difference]: Without dead ends: 2129 [2022-03-03 19:55:22,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:55:22,618 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:22,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 142 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-03 19:55:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-03 19:55:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-03 19:55:22,644 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-03 19:55:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:22,644 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-03 19:55:22,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-03 19:55:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:22,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:22,647 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] [2022-03-03 19:55:22,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:22,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 19:55:22,859 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash -15265638, now seen corresponding path program 18 times [2022-03-03 19:55:22,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:22,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106865246] [2022-03-03 19:55:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:22,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:22,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:22,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106865246] [2022-03-03 19:55:22,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106865246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:22,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139757738] [2022-03-03 19:55:22,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:22,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:22,908 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:22,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:55:22,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:55:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:22,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:22,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:23,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139757738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:23,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:23,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:55:23,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094670179] [2022-03-03 19:55:23,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:23,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:55:23,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:55:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:55:23,047 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:23,390 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-03 19:55:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:55:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:23,394 INFO L225 Difference]: With dead ends: 2262 [2022-03-03 19:55:23,394 INFO L226 Difference]: Without dead ends: 2262 [2022-03-03 19:55:23,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:55:23,395 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:23,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-03 19:55:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-03 19:55:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-03 19:55:23,421 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-03 19:55:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:23,421 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-03 19:55:23,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-03 19:55:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:23,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:23,423 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] [2022-03-03 19:55:23,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:23,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:55:23,639 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1098288294, now seen corresponding path program 19 times [2022-03-03 19:55:23,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:23,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917139552] [2022-03-03 19:55:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:23,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:23,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917139552] [2022-03-03 19:55:23,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917139552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:23,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089464364] [2022-03-03 19:55:23,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:23,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:23,675 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:23,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:55:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:23,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:23,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089464364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:23,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:23,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 19:55:23,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857608393] [2022-03-03 19:55:23,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:23,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:55:23,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:55:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:55:23,835 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:24,078 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-03 19:55:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:55:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:24,082 INFO L225 Difference]: With dead ends: 1474 [2022-03-03 19:55:24,082 INFO L226 Difference]: Without dead ends: 1464 [2022-03-03 19:55:24,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:55:24,082 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:24,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-03 19:55:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-03 19:55:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-03 19:55:24,103 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-03 19:55:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:24,103 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-03 19:55:24,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-03 19:55:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:24,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:24,105 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] [2022-03-03 19:55:24,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:24,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:24,318 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:24,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash -60086780, now seen corresponding path program 20 times [2022-03-03 19:55:24,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:24,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990451518] [2022-03-03 19:55:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:24,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:24,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:24,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990451518] [2022-03-03 19:55:24,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990451518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:24,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233295112] [2022-03-03 19:55:24,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:24,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:24,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:24,366 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:24,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:55:24,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:24,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:24,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:24,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:24,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:24,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233295112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:24,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:24,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:55:24,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32230259] [2022-03-03 19:55:24,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:24,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:55:24,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:55:24,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:55:24,486 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:24,744 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-03 19:55:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:55:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:24,749 INFO L225 Difference]: With dead ends: 2318 [2022-03-03 19:55:24,749 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 19:55:24,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:55:24,750 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:24,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 121 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 19:55:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-03 19:55:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-03 19:55:24,791 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-03 19:55:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:24,791 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-03 19:55:24,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-03 19:55:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:24,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:24,793 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] [2022-03-03 19:55:24,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 19:55:25,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:25,009 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:25,009 INFO L85 PathProgramCache]: Analyzing trace with hash 537249878, now seen corresponding path program 21 times [2022-03-03 19:55:25,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:25,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114271875] [2022-03-03 19:55:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:25,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:25,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114271875] [2022-03-03 19:55:25,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114271875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:25,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69625354] [2022-03-03 19:55:25,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:25,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:25,065 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:25,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:55:25,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:55:25,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:25,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:25,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:25,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69625354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:25,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:25,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:55:25,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026583381] [2022-03-03 19:55:25,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:55:25,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:55:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:55:25,210 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:25,491 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-03 19:55:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:55:25,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:25,495 INFO L225 Difference]: With dead ends: 2302 [2022-03-03 19:55:25,495 INFO L226 Difference]: Without dead ends: 2290 [2022-03-03 19:55:25,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:25,496 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:25,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 124 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:55:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-03 19:55:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-03 19:55:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-03 19:55:25,519 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-03 19:55:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:25,519 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-03 19:55:25,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-03 19:55:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:25,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:25,521 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] [2022-03-03 19:55:25,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:55:25,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:55:25,728 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash 10829594, now seen corresponding path program 22 times [2022-03-03 19:55:25,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:25,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406031870] [2022-03-03 19:55:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:25,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:25,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406031870] [2022-03-03 19:55:25,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406031870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:25,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967350511] [2022-03-03 19:55:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:25,766 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:25,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:55:25,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:25,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:25,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:25,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:25,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:25,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967350511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:25,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:25,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:55:25,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895434383] [2022-03-03 19:55:25,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:25,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:55:25,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:55:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:25,963 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-03 19:55:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:26,725 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-03 19:55:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:55:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:26,733 INFO L225 Difference]: With dead ends: 4760 [2022-03-03 19:55:26,733 INFO L226 Difference]: Without dead ends: 4760 [2022-03-03 19:55:26,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:55:26,734 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 408 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:26,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 205 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-03 19:55:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-03 19:55:26,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-03 19:55:26,778 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-03 19:55:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:26,778 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-03 19:55:26,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-03 19:55:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-03 19:55:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:26,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:26,780 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] [2022-03-03 19:55:26,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:26,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:55:26,987 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash 577781674, now seen corresponding path program 23 times [2022-03-03 19:55:26,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:26,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738710407] [2022-03-03 19:55:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:27,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:27,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738710407] [2022-03-03 19:55:27,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738710407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:27,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929549992] [2022-03-03 19:55:27,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:27,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:27,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:27,025 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:27,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:55:27,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:27,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:27,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:27,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929549992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:27,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:27,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:55:27,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528384646] [2022-03-03 19:55:27,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:27,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:55:27,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:55:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:27,240 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-03 19:55:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:27,941 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-03 19:55:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:55:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:27,950 INFO L225 Difference]: With dead ends: 4260 [2022-03-03 19:55:27,950 INFO L226 Difference]: Without dead ends: 4260 [2022-03-03 19:55:27,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:55:27,951 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 452 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:27,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 199 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:27,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-03 19:55:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-03 19:55:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-03 19:55:28,006 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-03 19:55:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:28,006 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-03 19:55:28,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-03 19:55:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-03 19:55:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:28,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:28,009 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] [2022-03-03 19:55:28,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:28,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:55:28,225 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash -594564184, now seen corresponding path program 24 times [2022-03-03 19:55:28,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:28,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654696430] [2022-03-03 19:55:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:28,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:28,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:28,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654696430] [2022-03-03 19:55:28,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654696430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:28,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862614072] [2022-03-03 19:55:28,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:28,263 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:28,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:55:28,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:55:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:28,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:28,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862614072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:28,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:28,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:55:28,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419972929] [2022-03-03 19:55:28,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:28,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:55:28,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:28,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:55:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:55:28,426 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:29,062 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-03 19:55:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:55:29,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:29,071 INFO L225 Difference]: With dead ends: 4602 [2022-03-03 19:55:29,071 INFO L226 Difference]: Without dead ends: 4602 [2022-03-03 19:55:29,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:55:29,072 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 307 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:29,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 189 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-03 19:55:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-03 19:55:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-03 19:55:29,122 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-03 19:55:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:29,123 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-03 19:55:29,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-03 19:55:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:29,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:29,126 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] [2022-03-03 19:55:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:29,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:29,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash -513188096, now seen corresponding path program 25 times [2022-03-03 19:55:29,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:29,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532669574] [2022-03-03 19:55:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:29,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:29,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532669574] [2022-03-03 19:55:29,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532669574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:29,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385974942] [2022-03-03 19:55:29,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:29,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:29,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:29,372 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:29,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:55:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:29,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:29,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385974942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:29,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:29,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:55:29,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394970536] [2022-03-03 19:55:29,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:29,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:55:29,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:55:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:55:29,524 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:30,040 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-03 19:55:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:55:30,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:30,049 INFO L225 Difference]: With dead ends: 4348 [2022-03-03 19:55:30,049 INFO L226 Difference]: Without dead ends: 4344 [2022-03-03 19:55:30,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:55:30,050 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 387 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:30,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 153 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-03 19:55:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-03 19:55:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 19:55:30,094 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 19:55:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:30,094 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 19:55:30,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 19:55:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:30,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:30,097 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] [2022-03-03 19:55:30,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-03 19:55:30,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:30,302 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:30,302 INFO L85 PathProgramCache]: Analyzing trace with hash 417469120, now seen corresponding path program 26 times [2022-03-03 19:55:30,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:30,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570526873] [2022-03-03 19:55:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:30,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:30,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570526873] [2022-03-03 19:55:30,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570526873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:30,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779154482] [2022-03-03 19:55:30,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:30,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:30,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:30,368 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:30,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:55:30,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:30,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:30,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:30,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779154482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:30,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:30,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:55:30,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092876447] [2022-03-03 19:55:30,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:30,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:55:30,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:55:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:30,543 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:31,101 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-03 19:55:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:55:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:31,109 INFO L225 Difference]: With dead ends: 4035 [2022-03-03 19:55:31,110 INFO L226 Difference]: Without dead ends: 4035 [2022-03-03 19:55:31,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:55:31,110 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 416 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:31,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 206 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-03 19:55:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-03 19:55:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-03 19:55:31,156 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-03 19:55:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:31,157 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-03 19:55:31,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-03 19:55:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:31,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:31,159 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] [2022-03-03 19:55:31,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:31,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:31,360 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2060508274, now seen corresponding path program 27 times [2022-03-03 19:55:31,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:31,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795166471] [2022-03-03 19:55:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:31,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:31,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795166471] [2022-03-03 19:55:31,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795166471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:31,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883609966] [2022-03-03 19:55:31,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:31,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:31,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:31,412 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:31,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:55:31,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:55:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:31,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:31,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883609966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:31,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:31,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:55:31,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977695728] [2022-03-03 19:55:31,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:31,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:55:31,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:55:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:55:31,576 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:32,331 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-03 19:55:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:55:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:32,339 INFO L225 Difference]: With dead ends: 3794 [2022-03-03 19:55:32,339 INFO L226 Difference]: Without dead ends: 3790 [2022-03-03 19:55:32,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:55:32,340 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 332 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:32,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 201 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-03 19:55:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-03 19:55:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 19:55:32,386 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 19:55:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:32,386 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 19:55:32,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 19:55:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:32,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:32,389 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] [2022-03-03 19:55:32,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:55:32,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-03 19:55:32,590 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:32,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:32,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1231031038, now seen corresponding path program 28 times [2022-03-03 19:55:32,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:32,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630701249] [2022-03-03 19:55:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:32,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:32,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:32,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630701249] [2022-03-03 19:55:32,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630701249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:32,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118279621] [2022-03-03 19:55:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:32,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:32,628 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:32,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:55:32,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:32,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:32,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:32,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118279621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:32,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:32,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:55:32,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836742077] [2022-03-03 19:55:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:32,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:55:32,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:55:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:55:32,788 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:33,405 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-03 19:55:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:55:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:33,413 INFO L225 Difference]: With dead ends: 3978 [2022-03-03 19:55:33,413 INFO L226 Difference]: Without dead ends: 3978 [2022-03-03 19:55:33,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:55:33,414 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:33,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 190 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-03 19:55:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-03 19:55:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-03 19:55:33,456 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-03 19:55:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:33,457 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-03 19:55:33,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-03 19:55:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:33,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:33,460 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] [2022-03-03 19:55:33,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:33,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:33,675 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1149654950, now seen corresponding path program 29 times [2022-03-03 19:55:33,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:33,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117722339] [2022-03-03 19:55:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:33,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:33,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117722339] [2022-03-03 19:55:33,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117722339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:33,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520973204] [2022-03-03 19:55:33,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:33,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:33,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:33,709 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:33,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:55:33,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:33,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:33,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:33,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520973204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:33,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:33,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:55:33,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846291490] [2022-03-03 19:55:33,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:33,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:55:33,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:55:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:55:33,847 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:34,363 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-03 19:55:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:55:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:34,371 INFO L225 Difference]: With dead ends: 3706 [2022-03-03 19:55:34,371 INFO L226 Difference]: Without dead ends: 3702 [2022-03-03 19:55:34,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:55:34,371 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:34,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 162 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-03 19:55:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-03 19:55:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-03 19:55:34,409 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-03 19:55:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:34,409 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-03 19:55:34,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-03 19:55:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:34,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:34,412 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] [2022-03-03 19:55:34,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:34,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:34,627 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1630220374, now seen corresponding path program 30 times [2022-03-03 19:55:34,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:34,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674931174] [2022-03-03 19:55:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:34,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:34,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:34,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674931174] [2022-03-03 19:55:34,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674931174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:34,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996176590] [2022-03-03 19:55:34,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:34,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:34,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:34,659 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:34,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:55:34,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:55:34,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:34,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:34,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996176590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:34,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:34,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:55:34,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488239724] [2022-03-03 19:55:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:55:34,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:55:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:55:34,815 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:35,371 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-03 19:55:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:55:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:35,380 INFO L225 Difference]: With dead ends: 4114 [2022-03-03 19:55:35,380 INFO L226 Difference]: Without dead ends: 4102 [2022-03-03 19:55:35,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:55:35,381 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 238 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:35,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 209 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-03 19:55:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-03 19:55:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-03 19:55:35,424 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-03 19:55:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:35,424 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-03 19:55:35,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-03 19:55:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:35,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:35,427 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] [2022-03-03 19:55:35,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:55:35,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 19:55:35,631 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1067620206, now seen corresponding path program 31 times [2022-03-03 19:55:35,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:35,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307930348] [2022-03-03 19:55:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:35,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:35,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307930348] [2022-03-03 19:55:35,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307930348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:35,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735332682] [2022-03-03 19:55:35,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:35,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:35,675 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:35,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:55:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:35,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:35,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:35,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:35,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735332682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:35,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:35,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:55:35,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502222157] [2022-03-03 19:55:35,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:35,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:55:35,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:55:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:55:35,877 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:36,455 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-03 19:55:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:55:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:36,462 INFO L225 Difference]: With dead ends: 3694 [2022-03-03 19:55:36,462 INFO L226 Difference]: Without dead ends: 3694 [2022-03-03 19:55:36,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:55:36,463 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:36,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 240 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-03 19:55:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-03 19:55:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-03 19:55:36,505 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-03 19:55:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:36,505 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-03 19:55:36,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-03 19:55:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:36,508 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:36,508 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] [2022-03-03 19:55:36,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:55:36,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:55:36,725 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash 575418948, now seen corresponding path program 32 times [2022-03-03 19:55:36,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:36,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781294908] [2022-03-03 19:55:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:36,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:36,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781294908] [2022-03-03 19:55:36,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781294908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:36,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510543941] [2022-03-03 19:55:36,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:36,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:36,762 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:36,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:55:36,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:36,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:36,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:36,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510543941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:36,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:36,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:55:36,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26837514] [2022-03-03 19:55:36,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:36,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:55:36,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:55:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:55:36,936 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:37,735 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-03 19:55:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:55:37,735 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:37,742 INFO L225 Difference]: With dead ends: 3420 [2022-03-03 19:55:37,742 INFO L226 Difference]: Without dead ends: 3416 [2022-03-03 19:55:37,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:55:37,743 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 387 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:37,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 211 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:55:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-03 19:55:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-03 19:55:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-03 19:55:37,781 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-03 19:55:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:37,781 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-03 19:55:37,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-03 19:55:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:55:37,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:37,784 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] [2022-03-03 19:55:37,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:37,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:55:37,985 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash -692038230, now seen corresponding path program 33 times [2022-03-03 19:55:37,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:37,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217704329] [2022-03-03 19:55:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:37,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:38,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:38,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217704329] [2022-03-03 19:55:38,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217704329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:38,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107872611] [2022-03-03 19:55:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:38,021 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:38,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:55:38,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:55:38,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:38,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:55:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:38,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:38,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107872611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:38,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:38,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:55:38,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645415617] [2022-03-03 19:55:38,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:38,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:55:38,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:55:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:55:38,168 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:38,734 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-03 19:55:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:55:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:55:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:38,741 INFO L225 Difference]: With dead ends: 3256 [2022-03-03 19:55:38,741 INFO L226 Difference]: Without dead ends: 3244 [2022-03-03 19:55:38,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:55:38,742 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 261 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:38,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 193 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:55:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-03 19:55:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-03 19:55:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-03 19:55:38,792 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-03 19:55:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:38,792 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-03 19:55:38,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-03 19:55:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:55:38,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:38,795 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] [2022-03-03 19:55:38,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:55:38,996 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1837488904, now seen corresponding path program 4 times [2022-03-03 19:55:38,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:38,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134111501] [2022-03-03 19:55:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:38,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:39,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:39,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134111501] [2022-03-03 19:55:39,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134111501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:39,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932027205] [2022-03-03 19:55:39,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:39,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:39,182 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:39,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:55:39,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:39,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:55:39,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:39,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:39,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-03-03 19:55:39,491 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:55:39,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-03 19:55:39,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:39,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-03 19:55:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:39,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:39,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-03 19:55:39,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:39,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-03 19:55:39,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:39,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:55:41,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:41,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:41,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:41,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:55:41,307 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:55:41,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:55:41,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:41,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:41,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:41,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:55:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:41,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932027205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:41,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:41,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:55:41,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722499503] [2022-03-03 19:55:41,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:41,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:55:41,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:41,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:55:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:55:41,679 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:43,696 INFO L93 Difference]: Finished difference Result 3843 states and 12416 transitions. [2022-03-03 19:55:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:55:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:55:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:43,704 INFO L225 Difference]: With dead ends: 3843 [2022-03-03 19:55:43,704 INFO L226 Difference]: Without dead ends: 3813 [2022-03-03 19:55:43,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:55:43,705 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 485 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:43,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 270 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:55:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-03-03 19:55:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1792. [2022-03-03 19:55:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-03 19:55:43,746 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-03 19:55:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:43,746 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-03 19:55:43,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-03 19:55:43,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:55:43,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:43,749 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] [2022-03-03 19:55:43,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:43,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:55:43,956 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 429080376, now seen corresponding path program 5 times [2022-03-03 19:55:43,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:43,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305078918] [2022-03-03 19:55:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:44,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:44,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305078918] [2022-03-03 19:55:44,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305078918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:44,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413271447] [2022-03-03 19:55:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:44,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:44,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:44,146 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:44,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:55:44,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:44,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:44,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:55:44,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:44,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:44,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-03 19:55:44,442 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:55:44,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-03 19:55:44,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:44,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:55:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:44,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:44,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:44,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:55:44,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:44,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:55:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:44,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:44,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:55:46,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:46,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:46,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:55:46,061 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:55:46,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:55:46,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:46,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:46,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:46,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:55:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:46,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413271447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:46,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:46,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:55:46,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011159587] [2022-03-03 19:55:46,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:46,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:55:46,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:46,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:55:46,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:55:46,411 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:55:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:48,366 INFO L93 Difference]: Finished difference Result 4012 states and 12890 transitions. [2022-03-03 19:55:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:55:48,366 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-03 19:55:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:48,373 INFO L225 Difference]: With dead ends: 4012 [2022-03-03 19:55:48,373 INFO L226 Difference]: Without dead ends: 3997 [2022-03-03 19:55:48,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=779, Invalid=3253, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 19:55:48,374 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 480 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:48,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 261 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1125 Invalid, 0 Unknown, 72 Unchecked, 0.7s Time] [2022-03-03 19:55:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2022-03-03 19:55:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 1801. [2022-03-03 19:55:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.5861111111111112) internal successors, (6455), 1800 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6455 transitions. [2022-03-03 19:55:48,410 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6455 transitions. Word has length 26 [2022-03-03 19:55:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:48,410 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 6455 transitions. [2022-03-03 19:55:48,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:55:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6455 transitions. [2022-03-03 19:55:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:55:48,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:48,413 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] [2022-03-03 19:55:48,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 19:55:48,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-03 19:55:48,614 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2020509684, now seen corresponding path program 34 times [2022-03-03 19:55:48,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:48,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398489398] [2022-03-03 19:55:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:48,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:48,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398489398] [2022-03-03 19:55:48,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398489398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:48,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073230249] [2022-03-03 19:55:48,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:48,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:48,886 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:48,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:55:48,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:48,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:55:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:49,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:49,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:49,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:49,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-03 19:55:49,201 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-03-03 19:55:49,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 33 [2022-03-03 19:55:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:49,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:55:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:49,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:49,401 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:49,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-03 19:55:49,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:49,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:55:49,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:49,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:49,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:49,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-03 19:55:50,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:50,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:50,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:50,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-03 19:55:50,029 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:55:50,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-03-03 19:55:50,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:50,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:55:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:50,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073230249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:50,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:50,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 19:55:50,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272837925] [2022-03-03 19:55:50,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:50,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:55:50,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:55:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:55:50,125 INFO L87 Difference]: Start difference. First operand 1801 states and 6455 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:53,023 INFO L93 Difference]: Finished difference Result 3548 states and 11961 transitions. [2022-03-03 19:55:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:55:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:55:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:53,029 INFO L225 Difference]: With dead ends: 3548 [2022-03-03 19:55:53,030 INFO L226 Difference]: Without dead ends: 3533 [2022-03-03 19:55:53,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:55:53,031 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 322 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:53,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 322 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:55:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-03-03 19:55:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 1853. [2022-03-03 19:55:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.576133909287257) internal successors, (6623), 1852 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) [2022-03-03 19:55:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6623 transitions. [2022-03-03 19:55:53,069 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6623 transitions. Word has length 26 [2022-03-03 19:55:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:53,069 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6623 transitions. [2022-03-03 19:55:53,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6623 transitions. [2022-03-03 19:55:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:55:53,072 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:53,072 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] [2022-03-03 19:55:53,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:55:53,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-03 19:55:53,287 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1469410436, now seen corresponding path program 6 times [2022-03-03 19:55:53,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:53,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97844694] [2022-03-03 19:55:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:53,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:53,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97844694] [2022-03-03 19:55:53,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97844694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:53,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105002979] [2022-03-03 19:55:53,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:53,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:53,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:53,473 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:53,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:55:53,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:55:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:55:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:53,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:53,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-03 19:55:53,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:53,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:55:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:53,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:53,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:55:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:53,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:54,122 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:55:54,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:55:54,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:54,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:55:54,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:54,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:54,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:55:55,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:55,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:55:55,738 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:55:55,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:55:55,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:55,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:55:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:56,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105002979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:56,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:56,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 19:55:56,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131754711] [2022-03-03 19:55:56,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:56,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:55:56,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:55:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:55:56,118 INFO L87 Difference]: Start difference. First operand 1853 states and 6623 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-03 19:56:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:00,580 INFO L93 Difference]: Finished difference Result 4499 states and 14387 transitions. [2022-03-03 19:56:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:56:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-03-03 19:56:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:00,589 INFO L225 Difference]: With dead ends: 4499 [2022-03-03 19:56:00,589 INFO L226 Difference]: Without dead ends: 4469 [2022-03-03 19:56:00,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1151, Invalid=7405, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:56:00,590 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 557 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:00,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 650 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:56:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-03-03 19:56:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 1877. [2022-03-03 19:56:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.5794243070362475) internal successors, (6715), 1876 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6715 transitions. [2022-03-03 19:56:00,635 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6715 transitions. Word has length 26 [2022-03-03 19:56:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:00,635 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6715 transitions. [2022-03-03 19:56:00,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-03 19:56:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6715 transitions. [2022-03-03 19:56:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:00,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:00,638 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] [2022-03-03 19:56:00,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:56:00,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 19:56:00,844 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 80971128, now seen corresponding path program 35 times [2022-03-03 19:56:00,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:00,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655446745] [2022-03-03 19:56:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:01,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:01,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655446745] [2022-03-03 19:56:01,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655446745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:01,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726824516] [2022-03-03 19:56:01,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:01,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:01,137 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:01,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:56:01,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:01,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:01,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:56:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:01,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:01,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:01,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-03 19:56:01,436 INFO L353 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2022-03-03 19:56:01,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2022-03-03 19:56:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:01,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:56:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:01,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:01,629 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:01,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-03 19:56:01,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:01,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:56:01,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:01,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:01,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:01,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-03 19:56:03,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:03,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-03 19:56:03,098 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:56:03,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-03-03 19:56:03,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:56:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:03,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726824516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:03,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:03,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 19:56:03,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007331112] [2022-03-03 19:56:03,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:03,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:56:03,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:56:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:56:03,187 INFO L87 Difference]: Start difference. First operand 1877 states and 6715 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:06,881 INFO L93 Difference]: Finished difference Result 4376 states and 14404 transitions. [2022-03-03 19:56:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:56:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:56:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:06,889 INFO L225 Difference]: With dead ends: 4376 [2022-03-03 19:56:06,889 INFO L226 Difference]: Without dead ends: 4329 [2022-03-03 19:56:06,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1504, Invalid=7052, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:56:06,890 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 445 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:06,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 470 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:56:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2022-03-03 19:56:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 1914. [2022-03-03 19:56:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.5765812859383166) internal successors, (6842), 1913 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6842 transitions. [2022-03-03 19:56:06,937 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6842 transitions. Word has length 26 [2022-03-03 19:56:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:06,937 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 6842 transitions. [2022-03-03 19:56:06,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6842 transitions. [2022-03-03 19:56:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:06,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:06,941 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] [2022-03-03 19:56:06,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:07,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:07,155 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash -895347716, now seen corresponding path program 36 times [2022-03-03 19:56:07,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:07,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845592127] [2022-03-03 19:56:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:07,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:07,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845592127] [2022-03-03 19:56:07,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845592127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:07,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984778463] [2022-03-03 19:56:07,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:07,382 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:07,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:56:07,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:07,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:07,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:56:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:07,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:07,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:07,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 74 [2022-03-03 19:56:07,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:07,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 124 [2022-03-03 19:56:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:07,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:07,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 145 [2022-03-03 19:56:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:10,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:10,322 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:10,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-03 19:56:10,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:56:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-03 19:56:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:12,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-03 19:56:12,359 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:56:12,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-03-03 19:56:12,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:12,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:56:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:12,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984778463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:12,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:12,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-03-03 19:56:12,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157798815] [2022-03-03 19:56:12,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:12,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:56:12,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:12,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:56:12,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:56:12,438 INFO L87 Difference]: Start difference. First operand 1914 states and 6842 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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) [2022-03-03 19:56:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:23,038 INFO L93 Difference]: Finished difference Result 5648 states and 18021 transitions. [2022-03-03 19:56:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-03 19:56:23,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 26 [2022-03-03 19:56:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:23,048 INFO L225 Difference]: With dead ends: 5648 [2022-03-03 19:56:23,049 INFO L226 Difference]: Without dead ends: 5588 [2022-03-03 19:56:23,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15357 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=4191, Invalid=33639, Unknown=0, NotChecked=0, Total=37830 [2022-03-03 19:56:23,050 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 755 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:23,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 922 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:56:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2022-03-03 19:56:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 2010. [2022-03-03 19:56:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.5614733698357393) internal successors, (7155), 2009 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7155 transitions. [2022-03-03 19:56:23,105 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7155 transitions. Word has length 26 [2022-03-03 19:56:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:23,105 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 7155 transitions. [2022-03-03 19:56:23,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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) [2022-03-03 19:56:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7155 transitions. [2022-03-03 19:56:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:23,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:23,109 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] [2022-03-03 19:56:23,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:23,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:23,310 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -713845664, now seen corresponding path program 7 times [2022-03-03 19:56:23,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:23,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715968415] [2022-03-03 19:56:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:23,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:23,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715968415] [2022-03-03 19:56:23,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715968415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:23,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947137008] [2022-03-03 19:56:23,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:23,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:23,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:23,520 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:23,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:56:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:23,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:56:23,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:23,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-03-03 19:56:23,816 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:56:23,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-03 19:56:23,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:56:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:24,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:24,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:56:24,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:24,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:56:24,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:24,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:25,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:25,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:25,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:25,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:56:25,870 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:25,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:56:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:25,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:25,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:25,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:56:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:26,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947137008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:26,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:26,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:56:26,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164124531] [2022-03-03 19:56:26,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:26,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:56:26,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:56:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:56:26,236 INFO L87 Difference]: Start difference. First operand 2010 states and 7155 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:56:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:27,726 INFO L93 Difference]: Finished difference Result 3994 states and 13061 transitions. [2022-03-03 19:56:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:56:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-03 19:56:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:27,734 INFO L225 Difference]: With dead ends: 3994 [2022-03-03 19:56:27,734 INFO L226 Difference]: Without dead ends: 3979 [2022-03-03 19:56:27,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=591, Invalid=2379, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:56:27,735 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 465 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:27,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 276 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1062 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2022-03-03 19:56:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-03-03 19:56:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2041. [2022-03-03 19:56:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.556862745098039) internal successors, (7256), 2040 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7256 transitions. [2022-03-03 19:56:27,773 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7256 transitions. Word has length 26 [2022-03-03 19:56:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:27,773 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7256 transitions. [2022-03-03 19:56:27,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:56:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7256 transitions. [2022-03-03 19:56:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:27,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:27,777 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] [2022-03-03 19:56:27,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:27,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 19:56:27,977 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2087213910, now seen corresponding path program 8 times [2022-03-03 19:56:27,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:27,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669169567] [2022-03-03 19:56:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:28,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:28,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669169567] [2022-03-03 19:56:28,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669169567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:28,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855588630] [2022-03-03 19:56:28,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:28,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:28,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:28,164 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:28,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:56:28,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:28,494 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-03-03 19:56:28,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 215 [2022-03-03 19:56:28,525 INFO L353 Elim1Store]: treesize reduction 39, result has 55.2 percent of original size [2022-03-03 19:56:28,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 132 [2022-03-03 19:56:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:28,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:28,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2022-03-03 19:56:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:28,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:28,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:28,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-03-03 19:56:28,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:28,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:56:28,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:28,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-03-03 19:56:29,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:29,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 19:56:29,294 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-03-03 19:56:29,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 35 [2022-03-03 19:56:29,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:29,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:56:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:29,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855588630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:29,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:29,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:56:29,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439014998] [2022-03-03 19:56:29,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:29,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:56:29,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:56:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:56:29,415 INFO L87 Difference]: Start difference. First operand 2041 states and 7256 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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) [2022-03-03 19:56:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:34,451 INFO L93 Difference]: Finished difference Result 4646 states and 15150 transitions. [2022-03-03 19:56:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:56:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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 26 [2022-03-03 19:56:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:34,460 INFO L225 Difference]: With dead ends: 4646 [2022-03-03 19:56:34,460 INFO L226 Difference]: Without dead ends: 4601 [2022-03-03 19:56:34,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1423, Invalid=8279, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 19:56:34,461 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 494 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1150 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:34,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 782 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2046 Invalid, 0 Unknown, 1150 Unchecked, 1.0s Time] [2022-03-03 19:56:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-03-03 19:56:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2094. [2022-03-03 19:56:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.560917343526039) internal successors, (7453), 2093 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7453 transitions. [2022-03-03 19:56:34,509 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7453 transitions. Word has length 26 [2022-03-03 19:56:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:34,509 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7453 transitions. [2022-03-03 19:56:34,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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) [2022-03-03 19:56:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7453 transitions. [2022-03-03 19:56:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:34,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:34,513 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] [2022-03-03 19:56:34,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 19:56:34,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 19:56:34,713 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1088334556, now seen corresponding path program 9 times [2022-03-03 19:56:34,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:34,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835361672] [2022-03-03 19:56:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:34,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:34,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:34,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835361672] [2022-03-03 19:56:34,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835361672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:34,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983941441] [2022-03-03 19:56:34,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:34,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:34,887 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:34,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:56:34,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:34,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:56:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:35,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:35,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:35,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-03 19:56:35,212 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:56:35,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-03 19:56:35,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:35,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:56:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:35,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:35,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:35,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:35,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:56:35,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:35,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:56:35,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:35,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:35,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:37,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:37,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:37,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:37,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:56:37,348 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:37,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:56:37,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:37,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:37,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:37,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:56:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:37,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983941441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:37,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:37,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:56:37,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204488824] [2022-03-03 19:56:37,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:37,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:56:37,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:37,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:56:37,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:56:37,742 INFO L87 Difference]: Start difference. First operand 2094 states and 7453 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:56:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:40,126 INFO L93 Difference]: Finished difference Result 4343 states and 14153 transitions. [2022-03-03 19:56:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:56:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-03 19:56:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:40,140 INFO L225 Difference]: With dead ends: 4343 [2022-03-03 19:56:40,140 INFO L226 Difference]: Without dead ends: 4328 [2022-03-03 19:56:40,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=957, Invalid=3735, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:56:40,141 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 531 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:40,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 314 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1190 Invalid, 0 Unknown, 291 Unchecked, 0.6s Time] [2022-03-03 19:56:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-03-03 19:56:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 2101. [2022-03-03 19:56:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 3.5642857142857145) internal successors, (7485), 2100 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 7485 transitions. [2022-03-03 19:56:40,193 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 7485 transitions. Word has length 26 [2022-03-03 19:56:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 7485 transitions. [2022-03-03 19:56:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:56:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 7485 transitions. [2022-03-03 19:56:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:40,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:40,197 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] [2022-03-03 19:56:40,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:56:40,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 19:56:40,397 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:40,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1589099960, now seen corresponding path program 10 times [2022-03-03 19:56:40,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:40,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499396885] [2022-03-03 19:56:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:40,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499396885] [2022-03-03 19:56:40,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499396885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:40,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447329955] [2022-03-03 19:56:40,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:40,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:40,587 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:40,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:56:40,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:40,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:40,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:56:40,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:40,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:40,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-03-03 19:56:40,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:40,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-03-03 19:56:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:40,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:40,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:56:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:41,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:41,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:56:41,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:41,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:56:41,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:41,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:41,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:41,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:41,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:41,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:41,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:56:41,793 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:41,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:56:41,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:41,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:41,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:41,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:56:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:42,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447329955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:42,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:42,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:56:42,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544725399] [2022-03-03 19:56:42,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:42,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:56:42,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:56:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:56:42,328 INFO L87 Difference]: Start difference. First operand 2101 states and 7485 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-03-03 19:56:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:45,280 INFO L93 Difference]: Finished difference Result 4739 states and 15412 transitions. [2022-03-03 19:56:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:56:45,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 26 [2022-03-03 19:56:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:45,289 INFO L225 Difference]: With dead ends: 4739 [2022-03-03 19:56:45,290 INFO L226 Difference]: Without dead ends: 4709 [2022-03-03 19:56:45,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:56:45,290 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 622 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:45,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 423 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1454 Invalid, 0 Unknown, 245 Unchecked, 0.8s Time] [2022-03-03 19:56:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4709 states. [2022-03-03 19:56:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4709 to 2096. [2022-03-03 19:56:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.562291169451074) internal successors, (7463), 2095 states have internal predecessors, (7463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7463 transitions. [2022-03-03 19:56:45,349 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7463 transitions. Word has length 26 [2022-03-03 19:56:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:45,349 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7463 transitions. [2022-03-03 19:56:45,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-03-03 19:56:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7463 transitions. [2022-03-03 19:56:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:45,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:45,353 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] [2022-03-03 19:56:45,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:45,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:45,553 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash -455050340, now seen corresponding path program 11 times [2022-03-03 19:56:45,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:45,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146928935] [2022-03-03 19:56:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:45,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:45,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:45,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146928935] [2022-03-03 19:56:45,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146928935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:45,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781117683] [2022-03-03 19:56:45,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:45,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:45,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:45,757 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:45,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:56:45,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:45,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:45,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:46,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-03-03 19:56:46,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-03 19:56:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:46,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:56:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:46,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:46,303 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:46,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:56:46,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:56:46,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:46,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:48,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:48,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:48,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:48,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:56:48,475 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:48,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:56:48,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:48,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:48,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:48,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:56:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:48,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781117683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:48,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:48,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 19:56:48,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420303177] [2022-03-03 19:56:48,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:48,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:56:48,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:48,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:56:48,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:56:48,796 INFO L87 Difference]: Start difference. First operand 2096 states and 7463 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-03 19:56:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:51,520 INFO L93 Difference]: Finished difference Result 4040 states and 13349 transitions. [2022-03-03 19:56:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:56:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-03-03 19:56:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:51,527 INFO L225 Difference]: With dead ends: 4040 [2022-03-03 19:56:51,527 INFO L226 Difference]: Without dead ends: 4010 [2022-03-03 19:56:51,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=663, Invalid=4307, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:56:51,528 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 281 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:51,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:56:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-03-03 19:56:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 2094. [2022-03-03 19:56:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.5618729096989967) internal successors, (7455), 2093 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7455 transitions. [2022-03-03 19:56:51,567 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7455 transitions. Word has length 26 [2022-03-03 19:56:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:51,567 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7455 transitions. [2022-03-03 19:56:51,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-03 19:56:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7455 transitions. [2022-03-03 19:56:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:51,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:51,571 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] [2022-03-03 19:56:51,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:51,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 19:56:51,771 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:51,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2073438884, now seen corresponding path program 12 times [2022-03-03 19:56:51,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:51,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199298118] [2022-03-03 19:56:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:51,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:51,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:51,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199298118] [2022-03-03 19:56:51,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199298118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:51,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369278713] [2022-03-03 19:56:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:51,972 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:51,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:56:51,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:56:51,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:51,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:56:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:52,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-03 19:56:52,278 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:56:52,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-03-03 19:56:52,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-03 19:56:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:52,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:52,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:52,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-03 19:56:52,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:52,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-03 19:56:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:52,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:53,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:53,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:53,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:56:53,891 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:53,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:56:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:53,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:53,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:56:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:54,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369278713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:54,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:54,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:56:54,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587874656] [2022-03-03 19:56:54,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:54,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:56:54,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:56:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:56:54,307 INFO L87 Difference]: Start difference. First operand 2094 states and 7455 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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) [2022-03-03 19:56:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:56,452 INFO L93 Difference]: Finished difference Result 4187 states and 13537 transitions. [2022-03-03 19:56:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:56:56,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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 26 [2022-03-03 19:56:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:56,460 INFO L225 Difference]: With dead ends: 4187 [2022-03-03 19:56:56,460 INFO L226 Difference]: Without dead ends: 4095 [2022-03-03 19:56:56,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=615, Invalid=2691, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:56:56,460 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 277 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:56,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 397 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:56:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-03-03 19:56:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 2238. [2022-03-03 19:56:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.545820295037997) internal successors, (7932), 2237 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 7932 transitions. [2022-03-03 19:56:56,503 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 7932 transitions. Word has length 26 [2022-03-03 19:56:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:56,503 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 7932 transitions. [2022-03-03 19:56:56,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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) [2022-03-03 19:56:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 7932 transitions. [2022-03-03 19:56:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:56:56,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:56,507 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] [2022-03-03 19:56:56,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:56,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:56,708 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 560738446, now seen corresponding path program 13 times [2022-03-03 19:56:56,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:56,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862375369] [2022-03-03 19:56:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:56,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:56,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862375369] [2022-03-03 19:56:56,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862375369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:56,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017646245] [2022-03-03 19:56:56,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:56,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:56,900 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:56,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:56:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:57,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:57,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-03-03 19:56:57,160 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:56:57,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-03 19:56:57,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:57,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-03 19:56:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:57,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:57,383 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:57,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:56:57,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:57,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:56:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:57,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:57,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:59,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:59,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:59,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:59,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:57:00,008 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:00,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:57:00,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:00,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:00,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:00,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:57:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:00,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017646245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:00,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:00,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 19:57:00,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470533396] [2022-03-03 19:57:00,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:00,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:57:00,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:57:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:57:00,372 INFO L87 Difference]: Start difference. First operand 2238 states and 7932 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:57:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:03,238 INFO L93 Difference]: Finished difference Result 4478 states and 14711 transitions. [2022-03-03 19:57:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:57:03,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-03 19:57:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:03,247 INFO L225 Difference]: With dead ends: 4478 [2022-03-03 19:57:03,247 INFO L226 Difference]: Without dead ends: 4438 [2022-03-03 19:57:03,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=858, Invalid=4842, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:57:03,248 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 301 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:03,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 456 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:57:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-03-03 19:57:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 2306. [2022-03-03 19:57:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.547939262472885) internal successors, (8178), 2305 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8178 transitions. [2022-03-03 19:57:03,312 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8178 transitions. Word has length 26 [2022-03-03 19:57:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:03,312 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 8178 transitions. [2022-03-03 19:57:03,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:57:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8178 transitions. [2022-03-03 19:57:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:57:03,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:03,316 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] [2022-03-03 19:57:03,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-03 19:57:03,519 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1495978748, now seen corresponding path program 14 times [2022-03-03 19:57:03,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:03,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922246567] [2022-03-03 19:57:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:03,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:03,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:03,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922246567] [2022-03-03 19:57:03,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922246567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:03,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360929583] [2022-03-03 19:57:03,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:03,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:03,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:03,711 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:03,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:57:03,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:57:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:03,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:03,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:03,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-03 19:57:03,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:03,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 66 [2022-03-03 19:57:03,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:03,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:03,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:57:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:04,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:04,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:04,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-03 19:57:04,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-03 19:57:04,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:04,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:57:05,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:05,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:57:05,521 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:05,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:57:05,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:05,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:57:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:05,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360929583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:05,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:05,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:57:05,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876085416] [2022-03-03 19:57:05,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:05,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:57:05,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:57:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:57:05,846 INFO L87 Difference]: Start difference. First operand 2306 states and 8178 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 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) [2022-03-03 19:57:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:08,040 INFO L93 Difference]: Finished difference Result 4536 states and 14768 transitions. [2022-03-03 19:57:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:57:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 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 26 [2022-03-03 19:57:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:08,048 INFO L225 Difference]: With dead ends: 4536 [2022-03-03 19:57:08,048 INFO L226 Difference]: Without dead ends: 4447 [2022-03-03 19:57:08,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=932, Invalid=3898, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:57:08,049 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 412 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:08,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 225 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 856 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2022-03-03 19:57:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-03-03 19:57:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 2342. [2022-03-03 19:57:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 3.552755232806493) internal successors, (8317), 2341 states have internal predecessors, (8317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 8317 transitions. [2022-03-03 19:57:08,090 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 8317 transitions. Word has length 26 [2022-03-03 19:57:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:08,090 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 8317 transitions. [2022-03-03 19:57:08,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 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) [2022-03-03 19:57:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 8317 transitions. [2022-03-03 19:57:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:57:08,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:08,094 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] [2022-03-03 19:57:08,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-03 19:57:08,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-03 19:57:08,294 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:08,294 INFO L85 PathProgramCache]: Analyzing trace with hash 961943836, now seen corresponding path program 15 times [2022-03-03 19:57:08,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:08,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958994028] [2022-03-03 19:57:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:08,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:08,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958994028] [2022-03-03 19:57:08,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958994028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:08,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490003090] [2022-03-03 19:57:08,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:08,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:08,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:08,500 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:08,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:57:08,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:57:08,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:08,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:57:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:10,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:10,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-03 19:57:10,233 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:57:10,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-03 19:57:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:10,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:57:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:10,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:10,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:10,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-03-03 19:57:10,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:10,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-03-03 19:57:10,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:10,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-03-03 19:57:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:14,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490003090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:14,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:14,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:57:14,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65639851] [2022-03-03 19:57:14,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:14,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:57:14,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:14,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:57:14,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-03-03 19:57:14,505 INFO L87 Difference]: Start difference. First operand 2342 states and 8317 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:57:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:18,421 INFO L93 Difference]: Finished difference Result 4016 states and 13362 transitions. [2022-03-03 19:57:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:57:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-03 19:57:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:18,429 INFO L225 Difference]: With dead ends: 4016 [2022-03-03 19:57:18,429 INFO L226 Difference]: Without dead ends: 3983 [2022-03-03 19:57:18,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=594, Invalid=2483, Unknown=3, NotChecked=0, Total=3080 [2022-03-03 19:57:18,430 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:18,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 244 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 708 Invalid, 0 Unknown, 356 Unchecked, 0.4s Time] [2022-03-03 19:57:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-03-03 19:57:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 2371. [2022-03-03 19:57:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.5544303797468353) internal successors, (8424), 2370 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 8424 transitions. [2022-03-03 19:57:18,474 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 8424 transitions. Word has length 26 [2022-03-03 19:57:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:18,474 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 8424 transitions. [2022-03-03 19:57:18,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-03 19:57:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 8424 transitions. [2022-03-03 19:57:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:57:18,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:18,478 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] [2022-03-03 19:57:18,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:18,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:18,680 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -655588944, now seen corresponding path program 16 times [2022-03-03 19:57:18,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:18,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019630128] [2022-03-03 19:57:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:18,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:18,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:18,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019630128] [2022-03-03 19:57:18,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019630128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:18,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102771001] [2022-03-03 19:57:18,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:57:18,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:18,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:18,864 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:18,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:57:18,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:57:18,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:18,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:57:18,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:19,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:19,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-03 19:57:19,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:57:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:19,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:57:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:19,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:19,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:57:19,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:57:19,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:57:20,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:20,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:20,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:20,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:57:20,449 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:20,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:57:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:20,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:20,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:20,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:57:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:20,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102771001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:20,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:20,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:57:20,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543243513] [2022-03-03 19:57:20,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:20,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:57:20,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:57:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:57:20,897 INFO L87 Difference]: Start difference. First operand 2371 states and 8424 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-03-03 19:57:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:23,307 INFO L93 Difference]: Finished difference Result 4739 states and 15611 transitions. [2022-03-03 19:57:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:57:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 26 [2022-03-03 19:57:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:23,315 INFO L225 Difference]: With dead ends: 4739 [2022-03-03 19:57:23,316 INFO L226 Difference]: Without dead ends: 4695 [2022-03-03 19:57:23,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:57:23,317 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 490 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:23,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 283 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 881 Invalid, 0 Unknown, 339 Unchecked, 0.5s Time] [2022-03-03 19:57:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-03-03 19:57:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 2402. [2022-03-03 19:57:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 3.5622657226155767) internal successors, (8553), 2401 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 8553 transitions. [2022-03-03 19:57:23,386 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 8553 transitions. Word has length 26 [2022-03-03 19:57:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:23,386 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 8553 transitions. [2022-03-03 19:57:23,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-03-03 19:57:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 8553 transitions. [2022-03-03 19:57:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:57:23,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:23,390 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] [2022-03-03 19:57:23,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 19:57:23,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 19:57:23,591 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1949435448, now seen corresponding path program 17 times [2022-03-03 19:57:23,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:23,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714320933] [2022-03-03 19:57:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:23,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:23,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:23,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714320933] [2022-03-03 19:57:23,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714320933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:23,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906116094] [2022-03-03 19:57:23,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:57:23,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:23,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:23,785 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:23,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:57:23,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:57:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:57:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:26,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:26,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:26,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-03 19:57:26,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:26,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:57:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:26,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:26,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:57:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:26,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:26,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:26,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-03 19:57:26,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:26,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-03 19:57:26,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:26,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:26,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:57:27,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:27,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:27,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:27,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:57:27,212 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:27,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:57:27,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:27,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:27,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:27,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:57:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:27,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906116094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:27,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:27,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:57:27,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846509893] [2022-03-03 19:57:27,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:27,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:57:27,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:27,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:57:27,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2022-03-03 19:57:27,747 INFO L87 Difference]: Start difference. First operand 2402 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-03-03 19:57:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:30,443 INFO L93 Difference]: Finished difference Result 4699 states and 15443 transitions. [2022-03-03 19:57:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 19:57:30,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 26 [2022-03-03 19:57:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:30,452 INFO L225 Difference]: With dead ends: 4699 [2022-03-03 19:57:30,452 INFO L226 Difference]: Without dead ends: 4617 [2022-03-03 19:57:30,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1030, Invalid=5130, Unknown=2, NotChecked=0, Total=6162 [2022-03-03 19:57:30,453 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 410 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:30,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 331 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1217 Invalid, 0 Unknown, 378 Unchecked, 0.6s Time] [2022-03-03 19:57:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2022-03-03 19:57:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2487. [2022-03-03 19:57:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 3.5595333869670154) internal successors, (8849), 2486 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 8849 transitions. [2022-03-03 19:57:30,505 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 8849 transitions. Word has length 26 [2022-03-03 19:57:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:30,506 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 8849 transitions. [2022-03-03 19:57:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-03-03 19:57:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 8849 transitions. [2022-03-03 19:57:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:57:30,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:30,509 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] [2022-03-03 19:57:30,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:30,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 19:57:30,710 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash 702714798, now seen corresponding path program 18 times [2022-03-03 19:57:30,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:30,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546392993] [2022-03-03 19:57:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:30,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:30,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:30,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546392993] [2022-03-03 19:57:30,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546392993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:30,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647436051] [2022-03-03 19:57:30,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:30,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:30,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:30,911 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:30,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:57:30,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:57:30,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:30,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:57:30,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:32,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:32,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-03-03 19:57:32,642 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:57:32,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-03 19:57:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:32,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:57:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:32,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:32,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:32,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-03-03 19:57:32,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:32,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-03-03 19:57:32,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:32,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-03-03 19:58:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:07,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647436051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:07,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:07,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:58:07,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243379749] [2022-03-03 19:58:07,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:07,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:58:07,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:58:07,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-03-03 19:58:07,018 INFO L87 Difference]: Start difference. First operand 2487 states and 8849 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 19:58:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:11,175 INFO L93 Difference]: Finished difference Result 4278 states and 14188 transitions. [2022-03-03 19:58:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:58:11,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 26 [2022-03-03 19:58:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:11,183 INFO L225 Difference]: With dead ends: 4278 [2022-03-03 19:58:11,183 INFO L226 Difference]: Without dead ends: 4245 [2022-03-03 19:58:11,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=609, Invalid=2580, Unknown=3, NotChecked=0, Total=3192 [2022-03-03 19:58:11,184 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 314 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:11,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 288 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 712 Invalid, 0 Unknown, 317 Unchecked, 0.4s Time] [2022-03-03 19:58:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2022-03-03 19:58:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 2488. [2022-03-03 19:58:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 3.560514676316848) internal successors, (8855), 2487 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 8855 transitions. [2022-03-03 19:58:11,227 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 8855 transitions. Word has length 26 [2022-03-03 19:58:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:11,228 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 8855 transitions. [2022-03-03 19:58:11,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 19:58:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 8855 transitions. [2022-03-03 19:58:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:58:11,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:11,232 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] [2022-03-03 19:58:11,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:11,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:11,439 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1481820314, now seen corresponding path program 19 times [2022-03-03 19:58:11,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:11,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234348930] [2022-03-03 19:58:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:11,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:11,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234348930] [2022-03-03 19:58:11,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234348930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:11,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359212185] [2022-03-03 19:58:11,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:11,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:11,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:11,633 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:11,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:58:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:58:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:11,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:11,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-03-03 19:58:11,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:11,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-03 19:58:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:11,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:11,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:58:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:12,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:12,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:12,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:12,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:58:12,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:12,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-03 19:58:12,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:12,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:12,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:58:14,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:14,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:14,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:14,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-03 19:58:14,729 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:58:14,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-03 19:58:14,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:14,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:14,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:58:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:15,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359212185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:15,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:15,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:58:15,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791981414] [2022-03-03 19:58:15,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:15,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:58:15,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:58:15,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:58:15,162 INFO L87 Difference]: Start difference. First operand 2488 states and 8855 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 19:58:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:17,504 INFO L93 Difference]: Finished difference Result 4800 states and 15839 transitions. [2022-03-03 19:58:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:58:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 26 [2022-03-03 19:58:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:17,514 INFO L225 Difference]: With dead ends: 4800 [2022-03-03 19:58:17,514 INFO L226 Difference]: Without dead ends: 4764 [2022-03-03 19:58:17,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=966, Invalid=3726, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:58:17,515 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 495 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:17,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 304 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 921 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-03-03 19:58:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2022-03-03 19:58:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 2490. [2022-03-03 19:58:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 3.56046605062274) internal successors, (8862), 2489 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 8862 transitions. [2022-03-03 19:58:17,568 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 8862 transitions. Word has length 26 [2022-03-03 19:58:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:17,568 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 8862 transitions. [2022-03-03 19:58:17,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 19:58:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 8862 transitions. [2022-03-03 19:58:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:58:17,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:17,572 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] [2022-03-03 19:58:17,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:17,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:17,774 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2089528438, now seen corresponding path program 37 times [2022-03-03 19:58:17,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:17,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959552212] [2022-03-03 19:58:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:18,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:18,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959552212] [2022-03-03 19:58:18,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959552212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:18,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487645983] [2022-03-03 19:58:18,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:18,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:18,012 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:18,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:58:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:58:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:18,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 68 [2022-03-03 19:58:18,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 118 [2022-03-03 19:58:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:18,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:18,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-03-03 19:58:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:18,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:18,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 68 [2022-03-03 19:58:19,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:19,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:58:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:19,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:19,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:19,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 97 [2022-03-03 19:58:19,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:19,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:19,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:19,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-03 19:58:19,330 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:58:19,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2022-03-03 19:58:19,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:19,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:58:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:19,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487645983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:19,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:19,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:58:19,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809263101] [2022-03-03 19:58:19,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:19,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:58:19,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:19,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:58:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:58:19,433 INFO L87 Difference]: Start difference. First operand 2490 states and 8862 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-03-03 19:58:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:21,769 INFO L93 Difference]: Finished difference Result 4251 states and 14249 transitions. [2022-03-03 19:58:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:58:21,769 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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 26 [2022-03-03 19:58:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:21,777 INFO L225 Difference]: With dead ends: 4251 [2022-03-03 19:58:21,777 INFO L226 Difference]: Without dead ends: 4206 [2022-03-03 19:58:21,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=809, Invalid=3883, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:58:21,778 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 342 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:21,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 308 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:58:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2022-03-03 19:58:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 2520. [2022-03-03 19:58:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 3.55577610162763) internal successors, (8957), 2519 states have internal predecessors, (8957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 8957 transitions. [2022-03-03 19:58:21,827 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 8957 transitions. Word has length 26 [2022-03-03 19:58:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:21,827 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 8957 transitions. [2022-03-03 19:58:21,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-03-03 19:58:21,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 8957 transitions. [2022-03-03 19:58:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:58:21,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:21,831 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] [2022-03-03 19:58:21,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:22,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:22,032 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:22,032 INFO L85 PathProgramCache]: Analyzing trace with hash -971763080, now seen corresponding path program 38 times [2022-03-03 19:58:22,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:22,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301546779] [2022-03-03 19:58:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:22,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301546779] [2022-03-03 19:58:22,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301546779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:22,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039688443] [2022-03-03 19:58:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:22,258 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:22,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:58:22,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:58:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:22,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:22,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 65 [2022-03-03 19:58:22,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:22,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 115 [2022-03-03 19:58:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:22,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:22,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-03-03 19:58:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:33,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:33,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:33,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:33,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 75 [2022-03-03 19:58:33,469 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:58:33,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 45 [2022-03-03 19:58:33,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:33,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:58:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:33,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039688443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:33,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:33,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-03-03 19:58:33,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048225529] [2022-03-03 19:58:33,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:33,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:58:33,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:58:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=500, Unknown=8, NotChecked=0, Total=600 [2022-03-03 19:58:33,500 INFO L87 Difference]: Start difference. First operand 2520 states and 8957 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 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) [2022-03-03 19:58:35,993 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3))) (< c_i c_N) (not (< c_k c_N))) (<= 0 c_M)) is different from false [2022-03-03 19:58:37,882 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* (- 1) (select (select c_mult (select c_A 1)) (select c_B 1))) c_res1) (select (select c_mult (select c_A 0)) (select c_B 0))) (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (= 2 c_i) (< 1 c_N) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M) (= c_res2 (let ((.cse4 (+ (- 1) c_k))) (select (select c_mult (select c_A .cse4)) (select c_B .cse4))))) is different from false [2022-03-03 19:58:39,314 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M)) is different from false [2022-03-03 19:58:58,298 WARN L228 SmtUtils]: Spent 15.54s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-03 19:59:22,800 WARN L228 SmtUtils]: Spent 15.84s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-03 19:59:50,641 WARN L228 SmtUtils]: Spent 14.96s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-03 19:59:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:50,769 INFO L93 Difference]: Finished difference Result 6301 states and 20785 transitions. [2022-03-03 19:59:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:59:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 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 26 [2022-03-03 19:59:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:50,782 INFO L225 Difference]: With dead ends: 6301 [2022-03-03 19:59:50,782 INFO L226 Difference]: Without dead ends: 6133 [2022-03-03 19:59:50,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=890, Invalid=5572, Unknown=30, NotChecked=480, Total=6972 [2022-03-03 19:59:50,784 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 364 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:50,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 547 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1869 Invalid, 0 Unknown, 416 Unchecked, 0.9s Time] [2022-03-03 19:59:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-03-03 19:59:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 2611. [2022-03-03 19:59:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.539463601532567) internal successors, (9238), 2610 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 9238 transitions. [2022-03-03 19:59:50,855 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 9238 transitions. Word has length 26 [2022-03-03 19:59:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:50,855 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 9238 transitions. [2022-03-03 19:59:50,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 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) [2022-03-03 19:59:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 9238 transitions. [2022-03-03 19:59:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:59:50,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:50,859 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] [2022-03-03 19:59:50,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-03 19:59:51,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 19:59:51,073 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 96111484, now seen corresponding path program 39 times [2022-03-03 19:59:51,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:51,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14670356] [2022-03-03 19:59:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:51,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:51,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:51,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14670356] [2022-03-03 19:59:51,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14670356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:51,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057922508] [2022-03-03 19:59:51,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:59:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:51,318 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:51,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:59:51,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:59:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:59:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:51,752 INFO L353 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-03-03 19:59:51,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 225 [2022-03-03 19:59:51,793 INFO L353 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2022-03-03 19:59:51,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 151 [2022-03-03 19:59:51,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:51,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:51,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:51,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 Received shutdown request... [2022-03-03 20:07:35,354 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 20:07:35,355 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 20:07:35,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:35,390 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:07:35,391 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:07:35,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-03 20:07:35,571 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. [2022-03-03 20:07:35,573 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 20:07:35,573 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 20:07:35,573 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 20:07:35,575 INFO L732 BasicCegarLoop]: Path program histogram: [39, 19, 1, 1, 1] [2022-03-03 20:07:35,576 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:07:35,576 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:07:35,577 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:07:35 BasicIcfg [2022-03-03 20:07:35,577 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:07:35,578 INFO L158 Benchmark]: Toolchain (without parser) took 760445.33ms. Allocated memory was 194.0MB in the beginning and 339.7MB in the end (delta: 145.8MB). Free memory was 158.4MB in the beginning and 82.7MB in the end (delta: 75.7MB). Peak memory consumption was 237.9MB. Max. memory is 8.0GB. [2022-03-03 20:07:35,578 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 194.0MB. Free memory was 159.6MB in the beginning and 159.5MB in the end (delta: 85.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:07:35,578 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.88ms. Allocated memory is still 194.0MB. Free memory was 158.3MB in the beginning and 156.8MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-03 20:07:35,578 INFO L158 Benchmark]: Boogie Preprocessor took 13.42ms. Allocated memory is still 194.0MB. Free memory was 156.8MB in the beginning and 155.8MB in the end (delta: 945.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:07:35,578 INFO L158 Benchmark]: RCFGBuilder took 220.92ms. Allocated memory is still 194.0MB. Free memory was 155.7MB in the beginning and 146.3MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:07:35,578 INFO L158 Benchmark]: TraceAbstraction took 760179.23ms. Allocated memory was 194.0MB in the beginning and 339.7MB in the end (delta: 145.8MB). Free memory was 145.8MB in the beginning and 82.7MB in the end (delta: 63.1MB). Peak memory consumption was 224.2MB. Max. memory is 8.0GB. [2022-03-03 20:07:35,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09ms. Allocated memory is still 194.0MB. Free memory was 159.6MB in the beginning and 159.5MB in the end (delta: 85.3kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.88ms. Allocated memory is still 194.0MB. Free memory was 158.3MB in the beginning and 156.8MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.42ms. Allocated memory is still 194.0MB. Free memory was 156.8MB in the beginning and 155.8MB in the end (delta: 945.9kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 220.92ms. Allocated memory is still 194.0MB. Free memory was 155.7MB in the beginning and 146.3MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 760179.23ms. Allocated memory was 194.0MB in the beginning and 339.7MB in the end (delta: 145.8MB). Free memory was 145.8MB in the beginning and 82.7MB in the end (delta: 63.1MB). Peak memory consumption was 224.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 760.1s, OverallIterations: 61, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.2s, AutomataDifference: 166.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19519 SdHoareTripleChecker+Valid, 25.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19519 mSDsluCounter, 14459 SdHoareTripleChecker+Invalid, 21.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4427 IncrementalHoareTripleChecker+Unchecked, 25530 mSDsCounter, 3947 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51087 IncrementalHoareTripleChecker+Invalid, 59461 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3947 mSolverCounterUnsat, 1424 mSDtfsCounter, 51087 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5461 GetRequests, 2127 SyntacticMatches, 165 SemanticMatches, 3169 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 79105 ImplicationChecksByTransitivity, 163.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2611occurred in iteration=60, InterpolantAutomatonStates: 2707, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 60 MinimizatonAttempts, 98568 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 112.7s InterpolantComputationTime, 2854 NumberOfCodeBlocks, 2848 NumberOfCodeBlocksAsserted, 180 NumberOfCheckSat, 4078 ConstructedInterpolants, 35 QuantifiedInterpolants, 59352 SizeOfPredicates, 654 NumberOfNonLiveVariables, 3533 ConjunctsInSsa, 846 ConjunctsInUnsatCore, 174 InterpolantComputations, 3 PerfectInterpolantSequences, 174/878 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown