/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/max60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:03:22,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:03:22,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:03:22,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:03:22,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:03:22,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:03:22,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:03:22,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:03:22,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:03:22,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:03:22,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:03:22,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:03:22,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:03:22,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:03:22,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:03:22,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:03:22,838 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:03:22,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:03:22,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:03:22,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:03:22,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:03:22,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:03:22,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:03:22,839 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:03:22,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:03:22,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:03:22,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:03:22,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:03:22,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:03:22,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:03:22,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:03:22,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:03:22,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:03:22,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:03:22,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:03:22,841 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:03:22,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:03:22,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:03:22,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:03:23,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:03:23,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:03:23,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:03:23,065 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:03:23,067 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:03:23,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max60-2.i [2022-01-09 23:03:23,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02886e41b/20008eed909d46b283adb676ea2f6621/FLAGfaaaea0ed [2022-01-09 23:03:23,534 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:03:23,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i [2022-01-09 23:03:23,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02886e41b/20008eed909d46b283adb676ea2f6621/FLAGfaaaea0ed [2022-01-09 23:03:23,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02886e41b/20008eed909d46b283adb676ea2f6621 [2022-01-09 23:03:23,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:03:23,559 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:03:23,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:03:23,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:03:23,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:03:23,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@319b670d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23, skipping insertion in model container [2022-01-09 23:03:23,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:03:23,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:03:23,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i[1290,1303] [2022-01-09 23:03:23,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:03:23,747 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:03:23,767 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i[1290,1303] [2022-01-09 23:03:23,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:03:23,778 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:03:23,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23 WrapperNode [2022-01-09 23:03:23,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:03:23,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:03:23,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:03:23,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:03:23,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,809 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-01-09 23:03:23,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:03:23,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:03:23,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:03:23,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:03:23,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:03:23,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:03:23,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:03:23,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:03:23,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (1/1) ... [2022-01-09 23:03:23,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:03:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:23,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 23:03:23,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 23:03:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:03:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-01-09 23:03:23,904 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-01-09 23:03:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:03:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:03:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:03:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:03:23,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:03:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:03:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:03:23,961 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:03:23,962 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:03:24,070 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:03:24,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:03:24,075 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 23:03:24,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:03:24 BoogieIcfgContainer [2022-01-09 23:03:24,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:03:24,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:03:24,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:03:24,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:03:24,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:03:23" (1/3) ... [2022-01-09 23:03:24,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f16b4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:03:24, skipping insertion in model container [2022-01-09 23:03:24,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:03:23" (2/3) ... [2022-01-09 23:03:24,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f16b4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:03:24, skipping insertion in model container [2022-01-09 23:03:24,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:03:24" (3/3) ... [2022-01-09 23:03:24,088 INFO L111 eAbstractionObserver]: Analyzing ICFG max60-2.i [2022-01-09 23:03:24,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:03:24,092 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:03:24,127 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:03:24,134 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 23:03:24,134 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:03:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:03:24,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:24,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:24,154 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2022-01-09 23:03:24,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:24,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084854203] [2022-01-09 23:03:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:24,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-09 23:03:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-09 23:03:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-09 23:03:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:03:24,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:24,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084854203] [2022-01-09 23:03:24,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084854203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:03:24,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:03:24,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:03:24,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487680204] [2022-01-09 23:03:24,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:03:24,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:03:24,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:03:24,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:03:24,399 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:03:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:24,435 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-01-09 23:03:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:03:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-09 23:03:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:24,446 INFO L225 Difference]: With dead ends: 52 [2022-01-09 23:03:24,447 INFO L226 Difference]: Without dead ends: 24 [2022-01-09 23:03:24,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:03:24,457 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:24,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:03:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-09 23:03:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-09 23:03:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-09 23:03:24,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-01-09 23:03:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:24,492 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-09 23:03:24,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:03:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-09 23:03:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:03:24,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:24,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:24,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:03:24,498 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2022-01-09 23:03:24,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:24,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28474584] [2022-01-09 23:03:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:24,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-09 23:03:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-09 23:03:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-09 23:03:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 23:03:24,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:24,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28474584] [2022-01-09 23:03:24,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28474584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777940595] [2022-01-09 23:03:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:24,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:24,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:24,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:24,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:03:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:24,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:03:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:03:24,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:03:24,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777940595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:03:24,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:03:24,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:03:24,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366603491] [2022-01-09 23:03:24,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:03:24,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:03:24,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:03:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:03:24,817 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:03:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:24,838 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-09 23:03:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:03:24,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-09 23:03:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:24,843 INFO L225 Difference]: With dead ends: 46 [2022-01-09 23:03:24,843 INFO L226 Difference]: Without dead ends: 26 [2022-01-09 23:03:24,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:03:24,845 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:24,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:03:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-09 23:03:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-09 23:03:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-01-09 23:03:24,853 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2022-01-09 23:03:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:24,853 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-01-09 23:03:24,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:03:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-01-09 23:03:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 23:03:24,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:24,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:24,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:25,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:25,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2022-01-09 23:03:25,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:25,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645755078] [2022-01-09 23:03:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:25,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:03:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-09 23:03:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-09 23:03:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:03:25,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:25,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645755078] [2022-01-09 23:03:25,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645755078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:25,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845393902] [2022-01-09 23:03:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:25,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:25,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:25,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:25,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:03:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:03:25,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:03:25,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:03:25,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845393902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:03:25,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:03:25,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:03:25,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117595546] [2022-01-09 23:03:25,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:03:25,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:03:25,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:25,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:03:25,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:03:25,237 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:03:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:25,248 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-09 23:03:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:03:25,249 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-01-09 23:03:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:25,250 INFO L225 Difference]: With dead ends: 48 [2022-01-09 23:03:25,250 INFO L226 Difference]: Without dead ends: 29 [2022-01-09 23:03:25,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:03:25,251 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:25,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:03:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-09 23:03:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-01-09 23:03:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-09 23:03:25,256 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2022-01-09 23:03:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:25,257 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-09 23:03:25,257 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:03:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-09 23:03:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-09 23:03:25,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:25,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:25,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:25,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-09 23:03:25,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2022-01-09 23:03:25,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:25,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114638044] [2022-01-09 23:03:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:25,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:03:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-09 23:03:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-09 23:03:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:03:25,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:25,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114638044] [2022-01-09 23:03:25,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114638044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492718132] [2022-01-09 23:03:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:25,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:25,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:25,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:03:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:25,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:03:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:03:25,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:03:25,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492718132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:03:25,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:03:25,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-09 23:03:25,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902848628] [2022-01-09 23:03:25,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:03:25,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:03:25,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:03:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:03:25,760 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:03:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:25,783 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-01-09 23:03:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:03:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-01-09 23:03:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:25,787 INFO L225 Difference]: With dead ends: 43 [2022-01-09 23:03:25,787 INFO L226 Difference]: Without dead ends: 28 [2022-01-09 23:03:25,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:03:25,788 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:25,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:03:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-09 23:03:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-09 23:03:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-09 23:03:25,793 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2022-01-09 23:03:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:25,794 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-09 23:03:25,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:03:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-09 23:03:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 23:03:25,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:25,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:25,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:26,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:26,016 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2022-01-09 23:03:26,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:26,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405899070] [2022-01-09 23:03:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:26,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:03:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-09 23:03:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-09 23:03:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:03:26,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:26,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405899070] [2022-01-09 23:03:26,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405899070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:26,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167403917] [2022-01-09 23:03:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:26,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:26,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:26,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:26,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:03:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:03:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-09 23:03:26,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-09 23:03:26,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167403917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:26,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:26,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-09 23:03:26,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885163509] [2022-01-09 23:03:26,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:03:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:26,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:03:26,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:03:26,390 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:26,441 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-01-09 23:03:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:03:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-01-09 23:03:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:26,444 INFO L225 Difference]: With dead ends: 62 [2022-01-09 23:03:26,444 INFO L226 Difference]: Without dead ends: 40 [2022-01-09 23:03:26,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:03:26,446 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:26,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:03:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-09 23:03:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-01-09 23:03:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-01-09 23:03:26,458 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2022-01-09 23:03:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:26,458 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-01-09 23:03:26,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-01-09 23:03:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-09 23:03:26,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:26,460 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:26,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:26,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:26,675 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:26,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2022-01-09 23:03:26,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:26,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476229350] [2022-01-09 23:03:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:26,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-09 23:03:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-09 23:03:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-09 23:03:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-09 23:03:26,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476229350] [2022-01-09 23:03:26,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476229350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141824650] [2022-01-09 23:03:26,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:03:26,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:26,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:26,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:26,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:03:26,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:03:26,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:03:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-09 23:03:27,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-09 23:03:27,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141824650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:27,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:27,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-01-09 23:03:27,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944233604] [2022-01-09 23:03:27,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:27,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:03:27,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:03:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:03:27,155 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:03:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:27,200 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-01-09 23:03:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 23:03:27,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-01-09 23:03:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:27,201 INFO L225 Difference]: With dead ends: 78 [2022-01-09 23:03:27,201 INFO L226 Difference]: Without dead ends: 52 [2022-01-09 23:03:27,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:03:27,203 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:27,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 93 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:03:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-09 23:03:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-09 23:03:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-01-09 23:03:27,209 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 62 [2022-01-09 23:03:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:27,209 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-01-09 23:03:27,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:03:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-01-09 23:03:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-09 23:03:27,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:27,211 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:27,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:27,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:27,436 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:27,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1341943393, now seen corresponding path program 3 times [2022-01-09 23:03:27,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:27,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970621743] [2022-01-09 23:03:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:27,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:27,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-09 23:03:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-09 23:03:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-09 23:03:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-09 23:03:27,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970621743] [2022-01-09 23:03:27,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970621743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167048167] [2022-01-09 23:03:27,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:03:27,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:27,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:27,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:03:27,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:03:27,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:27,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:03:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-09 23:03:27,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-09 23:03:27,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167048167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:27,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:27,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-01-09 23:03:27,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847219966] [2022-01-09 23:03:27,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:27,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 23:03:27,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 23:03:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:03:27,953 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:28,032 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2022-01-09 23:03:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-09 23:03:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-01-09 23:03:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:28,035 INFO L225 Difference]: With dead ends: 98 [2022-01-09 23:03:28,035 INFO L226 Difference]: Without dead ends: 70 [2022-01-09 23:03:28,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:03:28,038 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:28,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-09 23:03:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-01-09 23:03:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-01-09 23:03:28,056 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 76 [2022-01-09 23:03:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:28,056 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-01-09 23:03:28,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-01-09 23:03:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-09 23:03:28,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:28,057 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:28,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:28,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:28,258 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1821282991, now seen corresponding path program 4 times [2022-01-09 23:03:28,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:28,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816020358] [2022-01-09 23:03:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:28,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:28,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-09 23:03:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:28,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-09 23:03:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:28,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-09 23:03:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-09 23:03:28,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816020358] [2022-01-09 23:03:28,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816020358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936505614] [2022-01-09 23:03:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:03:28,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:28,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:28,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:03:28,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:03:28,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:28,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 23:03:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-09 23:03:28,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-09 23:03:29,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936505614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:29,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:29,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-01-09 23:03:29,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824752704] [2022-01-09 23:03:29,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:29,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-09 23:03:29,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-09 23:03:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-01-09 23:03:29,129 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:29,193 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2022-01-09 23:03:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-09 23:03:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 126 [2022-01-09 23:03:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:29,194 INFO L225 Difference]: With dead ends: 139 [2022-01-09 23:03:29,194 INFO L226 Difference]: Without dead ends: 95 [2022-01-09 23:03:29,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-01-09 23:03:29,195 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:29,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 102 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-09 23:03:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-01-09 23:03:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-01-09 23:03:29,202 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 126 [2022-01-09 23:03:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:29,202 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-01-09 23:03:29,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-01-09 23:03:29,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-09 23:03:29,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:29,204 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:29,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:29,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:29,428 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash 717715625, now seen corresponding path program 5 times [2022-01-09 23:03:29,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:29,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87199791] [2022-01-09 23:03:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:29,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:29,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-09 23:03:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:29,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-09 23:03:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:29,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-09 23:03:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-09 23:03:29,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:29,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87199791] [2022-01-09 23:03:29,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87199791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139298543] [2022-01-09 23:03:29,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:03:29,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:29,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:29,804 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:29,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:03:30,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-09 23:03:30,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:03:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-01-09 23:03:30,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2022-01-09 23:03:31,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139298543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:31,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:31,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2022-01-09 23:03:31,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242426232] [2022-01-09 23:03:31,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:31,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-09 23:03:31,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-09 23:03:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:03:31,200 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 41 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:31,339 INFO L93 Difference]: Finished difference Result 174 states and 213 transitions. [2022-01-09 23:03:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-09 23:03:31,340 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 41 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 152 [2022-01-09 23:03:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:31,341 INFO L225 Difference]: With dead ends: 174 [2022-01-09 23:03:31,341 INFO L226 Difference]: Without dead ends: 130 [2022-01-09 23:03:31,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:03:31,342 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:31,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 194 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-09 23:03:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-01-09 23:03:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2022-01-09 23:03:31,350 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 152 [2022-01-09 23:03:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:31,351 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2022-01-09 23:03:31,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 41 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2022-01-09 23:03:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-09 23:03:31,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:31,359 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:31,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:31,583 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,SelfDestructingSolverStorable8 [2022-01-09 23:03:31,584 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash -180977309, now seen corresponding path program 6 times [2022-01-09 23:03:31,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:31,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377746635] [2022-01-09 23:03:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:31,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:31,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-09 23:03:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:32,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-09 23:03:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:32,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-01-09 23:03:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-01-09 23:03:32,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:32,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377746635] [2022-01-09 23:03:32,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377746635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083992376] [2022-01-09 23:03:32,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:03:32,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:32,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:32,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:32,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:03:32,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-09 23:03:32,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:32,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:03:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2022-01-09 23:03:32,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4210 trivial. 0 not checked. [2022-01-09 23:03:32,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083992376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:32,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:32,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2022-01-09 23:03:32,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605679355] [2022-01-09 23:03:32,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:32,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-09 23:03:32,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-09 23:03:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:03:32,818 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:32,901 INFO L93 Difference]: Finished difference Result 216 states and 256 transitions. [2022-01-09 23:03:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-09 23:03:32,901 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 250 [2022-01-09 23:03:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:32,905 INFO L225 Difference]: With dead ends: 216 [2022-01-09 23:03:32,905 INFO L226 Difference]: Without dead ends: 140 [2022-01-09 23:03:32,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:03:32,906 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:32,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 184 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-09 23:03:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-01-09 23:03:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.126865671641791) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2022-01-09 23:03:32,925 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 250 [2022-01-09 23:03:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:32,925 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2022-01-09 23:03:32,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2022-01-09 23:03:32,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-09 23:03:32,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:32,928 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:32,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:33,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:03:33,152 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1030534589, now seen corresponding path program 7 times [2022-01-09 23:03:33,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820063018] [2022-01-09 23:03:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:33,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:33,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-09 23:03:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:33,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-09 23:03:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:33,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-01-09 23:03:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-09 23:03:33,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:33,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820063018] [2022-01-09 23:03:33,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820063018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:33,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48520193] [2022-01-09 23:03:33,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:03:33,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:33,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:33,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:03:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:33,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-09 23:03:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-09 23:03:34,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-09 23:03:35,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48520193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:35,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:35,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-01-09 23:03:35,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750604878] [2022-01-09 23:03:35,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:35,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-09 23:03:35,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-09 23:03:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-01-09 23:03:35,322 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:35,459 INFO L93 Difference]: Finished difference Result 279 states and 342 transitions. [2022-01-09 23:03:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-09 23:03:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 260 [2022-01-09 23:03:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:35,463 INFO L225 Difference]: With dead ends: 279 [2022-01-09 23:03:35,463 INFO L226 Difference]: Without dead ends: 195 [2022-01-09 23:03:35,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-01-09 23:03:35,465 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:35,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 152 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-09 23:03:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-01-09 23:03:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0894736842105264) internal successors, (207), 190 states have internal predecessors, (207), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 213 transitions. [2022-01-09 23:03:35,474 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 213 transitions. Word has length 260 [2022-01-09 23:03:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:35,474 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 213 transitions. [2022-01-09 23:03:35,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 213 transitions. [2022-01-09 23:03:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-01-09 23:03:35,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:35,477 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:35,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:35,691 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,SelfDestructingSolverStorable10 [2022-01-09 23:03:35,691 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash -447473291, now seen corresponding path program 8 times [2022-01-09 23:03:35,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:35,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289416421] [2022-01-09 23:03:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:35,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:36,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-09 23:03:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-09 23:03:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:36,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2022-01-09 23:03:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-09 23:03:37,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289416421] [2022-01-09 23:03:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289416421] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101466508] [2022-01-09 23:03:37,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:03:37,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:37,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:37,008 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:37,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:03:37,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:03:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-09 23:03:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-09 23:03:37,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-09 23:03:38,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101466508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:38,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:38,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2022-01-09 23:03:38,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984979088] [2022-01-09 23:03:38,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:38,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-09 23:03:38,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-09 23:03:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-01-09 23:03:38,437 INFO L87 Difference]: Start difference. First operand 195 states and 213 transitions. Second operand has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:38,565 INFO L93 Difference]: Finished difference Result 291 states and 332 transitions. [2022-01-09 23:03:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-09 23:03:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 316 [2022-01-09 23:03:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:38,568 INFO L225 Difference]: With dead ends: 291 [2022-01-09 23:03:38,568 INFO L226 Difference]: Without dead ends: 207 [2022-01-09 23:03:38,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 631 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-01-09 23:03:38,570 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:38,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 177 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-09 23:03:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-01-09 23:03:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0841584158415842) internal successors, (219), 202 states have internal predecessors, (219), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2022-01-09 23:03:38,593 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 316 [2022-01-09 23:03:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:38,593 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2022-01-09 23:03:38,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:03:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2022-01-09 23:03:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-01-09 23:03:38,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:38,597 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:38,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:38,821 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,SelfDestructingSolverStorable11 [2022-01-09 23:03:38,822 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash 588773185, now seen corresponding path program 9 times [2022-01-09 23:03:38,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:38,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648258245] [2022-01-09 23:03:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:38,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-09 23:03:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:39,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-09 23:03:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:39,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2022-01-09 23:03:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 5211 trivial. 0 not checked. [2022-01-09 23:03:39,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:39,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648258245] [2022-01-09 23:03:39,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648258245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:39,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726277738] [2022-01-09 23:03:39,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:03:39,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:39,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:39,192 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:39,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:03:39,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-09 23:03:39,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 23:03:39,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2022-01-09 23:03:39,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7185 trivial. 0 not checked. [2022-01-09 23:03:40,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726277738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:40,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:40,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2022-01-09 23:03:40,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883232654] [2022-01-09 23:03:40,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:40,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 23:03:40,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 23:03:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:03:40,427 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:40,529 INFO L93 Difference]: Finished difference Result 313 states and 361 transitions. [2022-01-09 23:03:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-09 23:03:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 328 [2022-01-09 23:03:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:40,530 INFO L225 Difference]: With dead ends: 313 [2022-01-09 23:03:40,531 INFO L226 Difference]: Without dead ends: 230 [2022-01-09 23:03:40,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:03:40,532 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:40,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 218 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:40,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-09 23:03:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2022-01-09 23:03:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0810810810810811) internal successors, (240), 222 states have internal predecessors, (240), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 246 transitions. [2022-01-09 23:03:40,539 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 246 transitions. Word has length 328 [2022-01-09 23:03:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:40,539 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 246 transitions. [2022-01-09 23:03:40,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:03:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 246 transitions. [2022-01-09 23:03:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-01-09 23:03:40,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:40,544 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 45, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:40,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-09 23:03:40,771 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,SelfDestructingSolverStorable12 [2022-01-09 23:03:40,772 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash -228888372, now seen corresponding path program 10 times [2022-01-09 23:03:40,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:40,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058006617] [2022-01-09 23:03:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:40,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:40,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-09 23:03:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:41,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-09 23:03:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:41,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-01-09 23:03:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2022-01-09 23:03:41,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058006617] [2022-01-09 23:03:41,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058006617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:41,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134069229] [2022-01-09 23:03:41,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:03:41,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:41,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:41,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:03:41,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:03:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:41,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 23:03:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 5607 trivial. 0 not checked. [2022-01-09 23:03:41,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2022-01-09 23:03:42,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134069229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:42,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:42,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2022-01-09 23:03:42,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141584910] [2022-01-09 23:03:42,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:42,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-09 23:03:42,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-09 23:03:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:03:42,495 INFO L87 Difference]: Start difference. First operand 227 states and 246 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:03:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:42,613 INFO L93 Difference]: Finished difference Result 398 states and 471 transitions. [2022-01-09 23:03:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-09 23:03:42,615 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 356 [2022-01-09 23:03:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:42,617 INFO L225 Difference]: With dead ends: 398 [2022-01-09 23:03:42,617 INFO L226 Difference]: Without dead ends: 295 [2022-01-09 23:03:42,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:03:42,619 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 189 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:42,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 198 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-09 23:03:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-01-09 23:03:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.1206896551724137) internal successors, (325), 290 states have internal predecessors, (325), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:03:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 331 transitions. [2022-01-09 23:03:42,626 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 331 transitions. Word has length 356 [2022-01-09 23:03:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:42,627 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 331 transitions. [2022-01-09 23:03:42,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:03:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 331 transitions. [2022-01-09 23:03:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2022-01-09 23:03:42,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:42,631 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:42,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:42,856 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,SelfDestructingSolverStorable13 [2022-01-09 23:03:42,856 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1353851287, now seen corresponding path program 11 times [2022-01-09 23:03:42,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:42,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681519005] [2022-01-09 23:03:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:42,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:43,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-09 23:03:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2022-01-09 23:03:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2022-01-09 23:03:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22339 backedges. 0 proven. 10344 refuted. 0 times theorem prover too weak. 11995 trivial. 0 not checked. [2022-01-09 23:03:43,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:43,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681519005] [2022-01-09 23:03:43,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681519005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:43,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511282847] [2022-01-09 23:03:43,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:03:43,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:43,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:43,663 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:43,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process