/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:07:52,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:07:52,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:07:52,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 08:07:52,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:07:52,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:07:52,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:07:52,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:07:52,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:07:52,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:07:52,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:07:52,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:07:52,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:07:52,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:07:52,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:07:52,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:07:52,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:07:52,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:07:52,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:07:52,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:07:52,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:07:52,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:07:52,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:07:52,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:07:52,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:07:52,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:07:52,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:07:52,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:07:52,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:07:52,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:07:52,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:07:52,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:07:52,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:07:52,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:07:52,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:07:52,777 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:07:52,777 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:07:52,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:07:52,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:07:52,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:07:52,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:07:52,991 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:07:52,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-01-31 08:07:53,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f10f9e5/5753a43484774cbb87bb41e0dffbc245/FLAGe4e34c5dd [2022-01-31 08:07:53,381 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:07:53,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-01-31 08:07:53,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f10f9e5/5753a43484774cbb87bb41e0dffbc245/FLAGe4e34c5dd [2022-01-31 08:07:53,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f10f9e5/5753a43484774cbb87bb41e0dffbc245 [2022-01-31 08:07:53,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:07:53,821 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:07:53,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:07:53,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:07:53,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:07:53,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:07:53" (1/1) ... [2022-01-31 08:07:53,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64e20492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:53, skipping insertion in model container [2022-01-31 08:07:53,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:07:53" (1/1) ... [2022-01-31 08:07:53,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:07:53,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:07:54,037 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-01-31 08:07:54,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:07:54,046 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:07:54,063 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-01-31 08:07:54,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:07:54,075 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:07:54,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54 WrapperNode [2022-01-31 08:07:54,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:07:54,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:07:54,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:07:54,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:07:54,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:07:54,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:07:54,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:07:54,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:07:54,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:07:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:54,157 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) [2022-01-31 08:07:54,180 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 [2022-01-31 08:07:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:07:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:07:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:07:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:07:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:07:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:07:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:07:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:07:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:07:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:07:54,252 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:07:54,253 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:07:54,401 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:07:54,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:07:54,408 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 08:07:54,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:54 BoogieIcfgContainer [2022-01-31 08:07:54,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:07:54,410 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:07:54,410 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:07:54,411 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:07:54,413 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:54" (1/1) ... [2022-01-31 08:07:54,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:07:54 BasicIcfg [2022-01-31 08:07:54,425 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:07:54,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:07:54,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:07:54,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:07:54,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:07:53" (1/4) ... [2022-01-31 08:07:54,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb3f51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:07:54, skipping insertion in model container [2022-01-31 08:07:54,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:54" (2/4) ... [2022-01-31 08:07:54,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb3f51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:07:54, skipping insertion in model container [2022-01-31 08:07:54,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:54" (3/4) ... [2022-01-31 08:07:54,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb3f51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:07:54, skipping insertion in model container [2022-01-31 08:07:54,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:07:54" (4/4) ... [2022-01-31 08:07:54,434 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.cJordan [2022-01-31 08:07:54,438 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:07:54,438 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:07:54,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:07:54,480 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-01-31 08:07:54,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:07:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:07:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:07:54,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:54,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:54,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash 275998981, now seen corresponding path program 1 times [2022-01-31 08:07:54,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813763330] [2022-01-31 08:07:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:54,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:54,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:54,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813763330] [2022-01-31 08:07:54,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813763330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:54,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:54,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:07:54,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057939754] [2022-01-31 08:07:54,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:54,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:07:54,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:54,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:07:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:07:54,731 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:54,763 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-01-31 08:07:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:07:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:07:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:54,770 INFO L225 Difference]: With dead ends: 21 [2022-01-31 08:07:54,770 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 08:07:54,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:07:54,775 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:54,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 08:07:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 08:07:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-31 08:07:54,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2022-01-31 08:07:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:54,801 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-31 08:07:54,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-31 08:07:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:07:54,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:54,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:54,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:07:54,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1163502662, now seen corresponding path program 1 times [2022-01-31 08:07:54,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:54,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778742387] [2022-01-31 08:07:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:54,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:54,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778742387] [2022-01-31 08:07:54,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778742387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:54,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:54,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:07:54,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292301373] [2022-01-31 08:07:54,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:54,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:07:54,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:07:54,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:07:54,899 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:54,938 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-01-31 08:07:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:07:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:07:54,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:54,940 INFO L225 Difference]: With dead ends: 17 [2022-01-31 08:07:54,940 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 08:07:54,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:07:54,945 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:54,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 21 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 08:07:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-01-31 08:07:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-31 08:07:54,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2022-01-31 08:07:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:54,953 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-31 08:07:54,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-31 08:07:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:07:54,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:54,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:54,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:07:54,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1501273661, now seen corresponding path program 1 times [2022-01-31 08:07:54,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:54,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484567829] [2022-01-31 08:07:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:54,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:55,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:55,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484567829] [2022-01-31 08:07:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484567829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:55,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582865966] [2022-01-31 08:07:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:55,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:55,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:55,011 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) [2022-01-31 08:07:55,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:07:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:07:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:55,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:55,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582865966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:55,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:55,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:07:55,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394954993] [2022-01-31 08:07:55,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:55,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:07:55,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:07:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:07:55,254 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:55,375 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-31 08:07:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:07:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 08:07:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:55,376 INFO L225 Difference]: With dead ends: 22 [2022-01-31 08:07:55,376 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 08:07:55,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:07:55,377 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:55,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:07:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 08:07:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 08:07:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-31 08:07:55,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2022-01-31 08:07:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:55,380 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-31 08:07:55,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-31 08:07:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 08:07:55,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:55,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:55,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:55,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:55,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:55,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1171302726, now seen corresponding path program 2 times [2022-01-31 08:07:55,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:55,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473858996] [2022-01-31 08:07:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:55,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:07:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473858996] [2022-01-31 08:07:55,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473858996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:55,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:55,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:07:55,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523344844] [2022-01-31 08:07:55,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:55,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:07:55,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:07:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:55,709 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:55,782 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-31 08:07:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:07:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 08:07:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:55,785 INFO L225 Difference]: With dead ends: 25 [2022-01-31 08:07:55,785 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 08:07:55,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:07:55,792 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:55,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 08:07:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 08:07:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-31 08:07:55,795 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2022-01-31 08:07:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:55,795 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-31 08:07:55,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-31 08:07:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 08:07:55,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:55,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:55,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:07:55,797 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:55,797 INFO L85 PathProgramCache]: Analyzing trace with hash -341501829, now seen corresponding path program 1 times [2022-01-31 08:07:55,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:55,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391296628] [2022-01-31 08:07:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:55,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:55,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391296628] [2022-01-31 08:07:55,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391296628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465709180] [2022-01-31 08:07:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:55,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:55,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:55,900 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) [2022-01-31 08:07:55,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:07:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:07:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:56,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:56,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465709180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:56,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:56,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:07:56,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708017358] [2022-01-31 08:07:56,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:56,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:07:56,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:56,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:07:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:07:56,144 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:56,323 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-01-31 08:07:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:07:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 08:07:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:56,325 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:07:56,325 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 08:07:56,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:07:56,327 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:56,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:07:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 08:07:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 08:07:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-31 08:07:56,335 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 23 [2022-01-31 08:07:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:56,335 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-31 08:07:56,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-31 08:07:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 08:07:56,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:56,337 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:56,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:56,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:56,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 860266281, now seen corresponding path program 2 times [2022-01-31 08:07:56,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835831659] [2022-01-31 08:07:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:56,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:56,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:56,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835831659] [2022-01-31 08:07:56,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835831659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606886608] [2022-01-31 08:07:56,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:07:56,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:56,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:56,718 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) [2022-01-31 08:07:56,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:07:56,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:07:56,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:56,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:07:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:56,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:57,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606886608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:57,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:57,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:07:57,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139530140] [2022-01-31 08:07:57,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:57,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:07:57,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:07:57,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:07:57,057 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:57,441 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-01-31 08:07:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:07:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 08:07:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:57,442 INFO L225 Difference]: With dead ends: 60 [2022-01-31 08:07:57,442 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 08:07:57,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:07:57,443 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:57,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 46 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:07:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 08:07:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 08:07:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-01-31 08:07:57,447 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 35 [2022-01-31 08:07:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:57,447 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-01-31 08:07:57,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-01-31 08:07:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 08:07:57,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:57,448 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:57,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:57,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:57,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1717473915, now seen corresponding path program 3 times [2022-01-31 08:07:57,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998090026] [2022-01-31 08:07:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:57,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:58,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:58,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:58,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998090026] [2022-01-31 08:07:58,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998090026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:58,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546308786] [2022-01-31 08:07:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:07:58,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:58,018 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) [2022-01-31 08:07:58,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:07:58,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 08:07:58,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:58,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 08:07:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:58,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 08:07:58,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:07:58,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-31 08:07:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 08:07:58,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:58,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-31 08:07:58,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-01-31 08:07:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 08:07:58,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546308786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:58,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:58,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 7, 7] total 34 [2022-01-31 08:07:58,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808841938] [2022-01-31 08:07:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:58,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 08:07:58,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 08:07:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=794, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 08:07:58,473 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:59,019 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-01-31 08:07:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 08:07:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 08:07:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:59,021 INFO L225 Difference]: With dead ends: 66 [2022-01-31 08:07:59,021 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 08:07:59,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=957, Invalid=2703, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 08:07:59,022 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:59,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 81 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-31 08:07:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 08:07:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-31 08:07:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-01-31 08:07:59,025 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2022-01-31 08:07:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:59,026 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-01-31 08:07:59,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-01-31 08:07:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:07:59,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:59,027 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:59,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:59,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:59,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1191602173, now seen corresponding path program 4 times [2022-01-31 08:07:59,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:59,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908000472] [2022-01-31 08:07:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:59,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:59,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:07:59,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:59,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908000472] [2022-01-31 08:07:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908000472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:59,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051561328] [2022-01-31 08:07:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:07:59,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:59,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:59,535 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) [2022-01-31 08:07:59,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:07:59,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:07:59,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 08:07:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:07:59,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:00,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051561328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:00,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:00,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-01-31 08:08:00,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780105887] [2022-01-31 08:08:00,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:00,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 08:08:00,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:00,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 08:08:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 08:08:00,388 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:01,486 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2022-01-31 08:08:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 08:08:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 08:08:01,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:01,488 INFO L225 Difference]: With dead ends: 114 [2022-01-31 08:08:01,488 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 08:08:01,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 08:08:01,490 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:01,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 46 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 08:08:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-01-31 08:08:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-01-31 08:08:01,495 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 63 [2022-01-31 08:08:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:01,495 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-01-31 08:08:01,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-01-31 08:08:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 08:08:01,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:01,496 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:01,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:01,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:01,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 586273528, now seen corresponding path program 5 times [2022-01-31 08:08:01,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806573015] [2022-01-31 08:08:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:01,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:02,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806573015] [2022-01-31 08:08:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806573015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337986193] [2022-01-31 08:08:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:08:02,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:02,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:02,615 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) [2022-01-31 08:08:02,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:08:26,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-01-31 08:08:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 08:08:26,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:27,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337986193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:29,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:29,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-01-31 08:08:29,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764948585] [2022-01-31 08:08:29,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:29,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 08:08:29,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 08:08:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 08:08:29,383 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:33,034 INFO L93 Difference]: Finished difference Result 214 states and 215 transitions. [2022-01-31 08:08:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 08:08:33,035 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 08:08:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:33,036 INFO L225 Difference]: With dead ends: 214 [2022-01-31 08:08:33,037 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 08:08:33,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 08:08:33,043 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 206 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 46 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:08:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 08:08:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-01-31 08:08:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 states have internal predecessors, (212), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-01-31 08:08:33,050 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 113 [2022-01-31 08:08:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:33,051 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-01-31 08:08:33,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-01-31 08:08:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 08:08:33,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:33,053 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:33,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 08:08:33,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:33,264 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:33,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash 481133346, now seen corresponding path program 6 times [2022-01-31 08:08:33,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804015326] [2022-01-31 08:08:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:33,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:36,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:36,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804015326] [2022-01-31 08:08:36,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804015326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:36,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240169875] [2022-01-31 08:08:36,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:08:36,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:36,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:36,240 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) [2022-01-31 08:08:36,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:08:36,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 08:08:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 08:08:36,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:36,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 08:08:36,787 INFO L353 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-01-31 08:08:36,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2022-01-31 08:08:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-01-31 08:08:37,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:37,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-31 08:08:37,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:08:37,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2022-01-31 08:08:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-01-31 08:08:37,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240169875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:37,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:37,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 9, 9] total 114 [2022-01-31 08:08:37,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169824170] [2022-01-31 08:08:37,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:37,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 08:08:37,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 08:08:37,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5099, Invalid=7783, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 08:08:37,609 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:42,467 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2022-01-31 08:08:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 08:08:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 08:08:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:42,469 INFO L225 Difference]: With dead ends: 223 [2022-01-31 08:08:42,469 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 08:08:42,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=15296, Invalid=34210, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 08:08:42,473 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 230 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:42,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 59 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 283 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-31 08:08:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 08:08:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-01-31 08:08:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-01-31 08:08:42,481 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 213 [2022-01-31 08:08:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:42,485 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-01-31 08:08:42,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-01-31 08:08:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 08:08:42,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:42,490 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:42,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:42,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:42,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:42,704 INFO L85 PathProgramCache]: Analyzing trace with hash 418994273, now seen corresponding path program 7 times [2022-01-31 08:08:42,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:42,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898806257] [2022-01-31 08:08:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:42,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:08:45,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:45,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898806257] [2022-01-31 08:08:45,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898806257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357905008] [2022-01-31 08:08:45,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:08:45,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:45,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:45,783 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) [2022-01-31 08:08:45,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:08:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:46,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-31 08:08:46,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:08:46,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:08:55,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357905008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:55,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:55,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-01-31 08:08:55,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874892962] [2022-01-31 08:08:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:55,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-01-31 08:08:55,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-01-31 08:08:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 08:08:55,016 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:09:08,618 INFO L93 Difference]: Finished difference Result 422 states and 423 transitions. [2022-01-31 08:09:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-31 08:09:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 08:09:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:09:08,621 INFO L225 Difference]: With dead ends: 422 [2022-01-31 08:09:08,621 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 08:09:08,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2022-01-31 08:09:08,629 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 410 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:09:08,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 61 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:09:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 08:09:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2022-01-31 08:09:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 418 states have (on average 1.0047846889952152) internal successors, (420), 418 states have internal predecessors, (420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 423 transitions. [2022-01-31 08:09:08,640 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 423 transitions. Word has length 219 [2022-01-31 08:09:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:09:08,640 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 423 transitions. [2022-01-31 08:09:08,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 423 transitions. [2022-01-31 08:09:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-01-31 08:09:08,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:09:08,644 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:09:08,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:09:08,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 08:09:08,862 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:09:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:09:08,863 INFO L85 PathProgramCache]: Analyzing trace with hash -167283598, now seen corresponding path program 8 times [2022-01-31 08:09:08,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:09:08,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783987433] [2022-01-31 08:09:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:09:08,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:09:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:20,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:09:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:09:20,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:09:20,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783987433] [2022-01-31 08:09:20,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783987433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:09:20,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674955712] [2022-01-31 08:09:20,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:09:20,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:09:20,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:09:20,234 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) [2022-01-31 08:09:20,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:09:20,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:09:20,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:09:20,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 202 conjunts are in the unsatisfiable core [2022-01-31 08:09:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:09:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:09:21,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:09:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:09:54,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674955712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:09:54,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:09:54,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [204, 203, 203] total 406 [2022-01-31 08:09:54,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814970542] [2022-01-31 08:09:54,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:09:54,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 406 states [2022-01-31 08:09:54,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:09:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 406 interpolants. [2022-01-31 08:09:54,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81812, Invalid=82618, Unknown=0, NotChecked=0, Total=164430 [2022-01-31 08:09:54,887 INFO L87 Difference]: Start difference. First operand 422 states and 423 transitions. Second operand has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:10:48,263 INFO L93 Difference]: Finished difference Result 826 states and 827 transitions. [2022-01-31 08:10:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2022-01-31 08:10:48,268 INFO L78 Accepts]: Start accepts. Automaton has has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 421 [2022-01-31 08:10:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:10:48,270 INFO L225 Difference]: With dead ends: 826 [2022-01-31 08:10:48,270 INFO L226 Difference]: Without dead ends: 826 [2022-01-31 08:10:48,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1448 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101901 ImplicationChecksByTransitivity, 93.5s TimeCoverageRelationStatistics Valid=244623, Invalid=407433, Unknown=0, NotChecked=0, Total=652056 [2022-01-31 08:10:48,307 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 814 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:10:48,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 76 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 08:10:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-01-31 08:10:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2022-01-31 08:10:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 822 states have (on average 1.002433090024331) internal successors, (824), 822 states have internal predecessors, (824), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 827 transitions. [2022-01-31 08:10:48,320 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 827 transitions. Word has length 421 [2022-01-31 08:10:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:10:48,321 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 827 transitions. [2022-01-31 08:10:48,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 827 transitions. [2022-01-31 08:10:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2022-01-31 08:10:48,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:10:48,331 INFO L514 BasicCegarLoop]: trace histogram [402, 402, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:10:48,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:10:48,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:10:48,548 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:10:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:10:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2137493716, now seen corresponding path program 9 times [2022-01-31 08:10:48,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:10:48,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582850712] [2022-01-31 08:10:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:10:48,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:10:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:11:34,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:11:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:11:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:11:34,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:11:34,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582850712] [2022-01-31 08:11:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582850712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:11:34,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940227768] [2022-01-31 08:11:34,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:11:34,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:11:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:11:34,564 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) [2022-01-31 08:11:34,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:11:34,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 08:11:34,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:11:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 08:11:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:11:35,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 08:11:37,388 INFO L353 Elim1Store]: treesize reduction 68, result has 47.3 percent of original size [2022-01-31 08:11:37,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 79 [2022-01-31 08:11:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-01-31 08:11:38,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:11:40,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2022-01-31 08:11:40,120 INFO L353 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-01-31 08:11:40,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 123 [2022-01-31 08:11:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-01-31 08:11:40,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940227768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:11:40,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:11:40,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 13, 13] total 426 [2022-01-31 08:11:40,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019256162] [2022-01-31 08:11:40,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:11:40,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 426 states [2022-01-31 08:11:40,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:11:40,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 426 interpolants. [2022-01-31 08:11:40,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81917, Invalid=99133, Unknown=0, NotChecked=0, Total=181050 [2022-01-31 08:11:40,935 INFO L87 Difference]: Start difference. First operand 826 states and 827 transitions. Second operand has 426 states, 426 states have (on average 1.9812206572769953) internal successors, (844), 425 states have internal predecessors, (844), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:12:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:12:47,799 INFO L93 Difference]: Finished difference Result 838 states and 842 transitions. [2022-01-31 08:12:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 423 states. [2022-01-31 08:12:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 426 states, 426 states have (on average 1.9812206572769953) internal successors, (844), 425 states have internal predecessors, (844), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 825 [2022-01-31 08:12:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:12:47,803 INFO L225 Difference]: With dead ends: 838 [2022-01-31 08:12:47,803 INFO L226 Difference]: Without dead ends: 837 [2022-01-31 08:12:47,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2474 GetRequests, 1630 SyntacticMatches, 2 SemanticMatches, 842 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100681 ImplicationChecksByTransitivity, 110.8s TimeCoverageRelationStatistics Valid=245756, Invalid=465736, Unknown=0, NotChecked=0, Total=711492 [2022-01-31 08:12:47,835 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 839 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 08:12:47,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 121 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 976 Invalid, 0 Unknown, 165 Unchecked, 0.9s Time] [2022-01-31 08:12:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-31 08:12:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 836. [2022-01-31 08:12:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 832 states have (on average 1.0024038461538463) internal successors, (834), 832 states have internal predecessors, (834), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:12:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 837 transitions. [2022-01-31 08:12:47,843 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 837 transitions. Word has length 825 [2022-01-31 08:12:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:12:47,844 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 837 transitions. [2022-01-31 08:12:47,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 426 states, 426 states have (on average 1.9812206572769953) internal successors, (844), 425 states have internal predecessors, (844), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:12:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 837 transitions. [2022-01-31 08:12:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-01-31 08:12:47,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:12:47,850 INFO L514 BasicCegarLoop]: trace histogram [403, 403, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:12:47,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:12:48,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:12:48,063 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:12:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:12:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 878026069, now seen corresponding path program 10 times [2022-01-31 08:12:48,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:12:48,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134417878] [2022-01-31 08:12:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:12:48,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:12:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:33,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:13:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 162481 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-31 08:13:33,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:13:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134417878] [2022-01-31 08:13:33,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134417878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:13:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465330667] [2022-01-31 08:13:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:13:33,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:13:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:13:33,534 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) [2022-01-31 08:13:33,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:13:34,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:13:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:13:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 3768 conjuncts, 405 conjunts are in the unsatisfiable core [2022-01-31 08:13:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:13:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 162481 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-31 08:13:35,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:15:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 162481 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-31 08:15:51,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465330667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:15:51,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:15:51,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [407, 406, 406] total 812 [2022-01-31 08:15:51,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338179899] [2022-01-31 08:15:51,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:15:51,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 812 states [2022-01-31 08:15:51,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:15:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 812 interpolants. [2022-01-31 08:15:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328457, Invalid=330075, Unknown=0, NotChecked=0, Total=658532 [2022-01-31 08:15:51,863 INFO L87 Difference]: Start difference. First operand 836 states and 837 transitions. Second operand has 812 states, 812 states have (on average 2.0061576354679804) internal successors, (1629), 811 states have internal predecessors, (1629), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)