/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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:32:06,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:32:06,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:32:06,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 20:32:06,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 20:32:06,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 20:32:06,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 20:32:06,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 20:32:06,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 20:32:06,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 20:32:06,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 20:32:06,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 20:32:06,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:32:06,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:32:06,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:32:06,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:32:06,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:32:06,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:32:06,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:32:06,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:32:06,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:32:06,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:32:06,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:32:06,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:32:06,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:32:06,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:32:06,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:32:06,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:32:06,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:32:06,427 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:32:06,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:32:06,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:32:06,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:32:06,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:32:06,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:32:06,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:32:06,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:32:06,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:32:06,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:32:06,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:32:06,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:32:06,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:32:06,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:32:06,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:32:06,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:32:06,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:32:06,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:32:06,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:32:06,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:32:06,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:32:06,433 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:32:06,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:32:06,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:32:06,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:32:06,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:32:06,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:32:06,713 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:32:06,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2022-02-14 20:32:06,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93b4489d/b06a1e409a7a468bada0889d20fd60df/FLAGa3977951b [2022-02-14 20:32:07,168 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:32:07,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c [2022-02-14 20:32:07,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93b4489d/b06a1e409a7a468bada0889d20fd60df/FLAGa3977951b [2022-02-14 20:32:07,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93b4489d/b06a1e409a7a468bada0889d20fd60df [2022-02-14 20:32:07,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:32:07,594 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:32:07,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:32:07,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:32:07,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:32:07,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f3b512c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07, skipping insertion in model container [2022-02-14 20:32:07,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:32:07,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:32:07,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c[609,622] [2022-02-14 20:32:07,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:32:07,753 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:32:07,767 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c[609,622] [2022-02-14 20:32:07,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:32:07,785 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:32:07,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07 WrapperNode [2022-02-14 20:32:07,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:32:07,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:32:07,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:32:07,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:32:07,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:32:07,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:32:07,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:32:07,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:32:07,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:32:07,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:07,877 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) [2022-02-14 20:32:07,902 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 [2022-02-14 20:32:07,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:32:07,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:32:07,925 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:32:07,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:32:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:32:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:32:07,926 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:32:07,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:32:07,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-14 20:32:07,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:32:07,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:32:07,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:32:07,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:32:07,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:32:07,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:32:07,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:32:08,018 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:32:08,019 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:32:08,124 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:32:08,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:32:08,140 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 20:32:08,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:08 BoogieIcfgContainer [2022-02-14 20:32:08,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:32:08,143 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:32:08,143 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:32:08,155 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:32:08,157 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:08" (1/1) ... [2022-02-14 20:32:08,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:32:08 BasicIcfg [2022-02-14 20:32:08,180 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:32:08,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:32:08,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:32:08,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:32:08,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:32:07" (1/4) ... [2022-02-14 20:32:08,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181d664c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:32:08, skipping insertion in model container [2022-02-14 20:32:08,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (2/4) ... [2022-02-14 20:32:08,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181d664c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:32:08, skipping insertion in model container [2022-02-14 20:32:08,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:08" (3/4) ... [2022-02-14 20:32:08,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181d664c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:32:08, skipping insertion in model container [2022-02-14 20:32:08,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:32:08" (4/4) ... [2022-02-14 20:32:08,214 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.cJordan [2022-02-14 20:32:08,225 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:32:08,225 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:32:08,263 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:32:08,270 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 [2022-02-14 20:32:08,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:32:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-02-14 20:32:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-14 20:32:08,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:08,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:08,295 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash -282074373, now seen corresponding path program 1 times [2022-02-14 20:32:08,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:08,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540274333] [2022-02-14 20:32:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:08,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:08,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540274333] [2022-02-14 20:32:08,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540274333] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:32:08,478 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:32:08,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 20:32:08,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175962737] [2022-02-14 20:32:08,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:32:08,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 20:32:08,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 20:32:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:32:08,514 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-14 20:32:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:08,572 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-02-14 20:32:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 20:32:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 10 [2022-02-14 20:32:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:08,583 INFO L225 Difference]: With dead ends: 27 [2022-02-14 20:32:08,584 INFO L226 Difference]: Without dead ends: 21 [2022-02-14 20:32:08,585 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 [2022-02-14 20:32:08,589 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:08,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:32:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-14 20:32:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2022-02-14 20:32:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-02-14 20:32:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-14 20:32:08,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-02-14 20:32:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:08,619 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-14 20:32:08,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-14 20:32:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-14 20:32:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-14 20:32:08,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:08,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:08,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:32:08,621 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash -282044551, now seen corresponding path program 1 times [2022-02-14 20:32:08,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:08,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087564822] [2022-02-14 20:32:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:08,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:08,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087564822] [2022-02-14 20:32:08,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087564822] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:32:08,725 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:32:08,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:32:08,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710656104] [2022-02-14 20:32:08,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:32:08,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:32:08,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:32:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:32:08,728 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-14 20:32:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:08,781 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-02-14 20:32:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 20:32:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2022-02-14 20:32:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:08,783 INFO L225 Difference]: With dead ends: 19 [2022-02-14 20:32:08,784 INFO L226 Difference]: Without dead ends: 19 [2022-02-14 20:32:08,784 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 [2022-02-14 20:32:08,785 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:08,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:32:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-14 20:32:08,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2022-02-14 20:32:08,789 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) [2022-02-14 20:32:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-14 20:32:08,790 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2022-02-14 20:32:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:08,790 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-14 20:32:08,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-14 20:32:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-14 20:32:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-14 20:32:08,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:08,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:08,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:32:08,791 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1097051654, now seen corresponding path program 1 times [2022-02-14 20:32:08,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:08,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66309719] [2022-02-14 20:32:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:32:08,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:08,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66309719] [2022-02-14 20:32:08,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66309719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:08,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433494675] [2022-02-14 20:32:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:08,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:08,903 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) [2022-02-14 20:32:08,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:32:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 20:32:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:32:09,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:32:09,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433494675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:09,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:09,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-14 20:32:09,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162969609] [2022-02-14 20:32:09,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:09,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 20:32:09,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 20:32:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-14 20:32:09,129 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-02-14 20:32:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:09,231 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-02-14 20:32:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:32:09,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 [2022-02-14 20:32:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:09,233 INFO L225 Difference]: With dead ends: 31 [2022-02-14 20:32:09,234 INFO L226 Difference]: Without dead ends: 31 [2022-02-14 20:32:09,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:32:09,239 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:09,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:32:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-14 20:32:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-14 20:32:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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) [2022-02-14 20:32:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-02-14 20:32:09,251 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 15 [2022-02-14 20:32:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:09,251 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-02-14 20:32:09,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-02-14 20:32:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-02-14 20:32:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-14 20:32:09,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:09,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:09,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 20:32:09,475 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 [2022-02-14 20:32:09,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2017057343, now seen corresponding path program 2 times [2022-02-14 20:32:09,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:09,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638259259] [2022-02-14 20:32:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:09,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-02-14 20:32:09,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:09,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638259259] [2022-02-14 20:32:09,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638259259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:09,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853249627] [2022-02-14 20:32:09,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:32:09,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:09,728 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) [2022-02-14 20:32:09,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:32:09,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:32:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:32:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-14 20:32:09,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:10,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 20:32:10,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853249627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:10,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:10,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-14 20:32:10,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833689866] [2022-02-14 20:32:10,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:10,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 20:32:10,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 20:32:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:32:10,168 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-02-14 20:32:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:10,621 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-02-14 20:32:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 20:32:10,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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 30 [2022-02-14 20:32:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:10,623 INFO L225 Difference]: With dead ends: 61 [2022-02-14 20:32:10,623 INFO L226 Difference]: Without dead ends: 61 [2022-02-14 20:32:10,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-02-14 20:32:10,624 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:10,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 71 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:32:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-14 20:32:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-14 20:32:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 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) [2022-02-14 20:32:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-02-14 20:32:10,631 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 30 [2022-02-14 20:32:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:10,631 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-02-14 20:32:10,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-02-14 20:32:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-02-14 20:32:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-14 20:32:10,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:10,633 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:10,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:32:10,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 20:32:10,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1848630061, now seen corresponding path program 3 times [2022-02-14 20:32:10,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:10,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784280259] [2022-02-14 20:32:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:11,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-02-14 20:32:11,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:11,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784280259] [2022-02-14 20:32:11,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784280259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:11,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123133519] [2022-02-14 20:32:11,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:32:11,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:11,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:11,135 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) [2022-02-14 20:32:11,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 20:32:12,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-14 20:32:12,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:32:12,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 20:32:12,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-02-14 20:32:12,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-02-14 20:32:13,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123133519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:13,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:13,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-02-14 20:32:13,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175361609] [2022-02-14 20:32:13,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:13,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 20:32:13,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 20:32:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-02-14 20:32:13,116 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2022-02-14 20:32:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:17,814 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-02-14 20:32:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 20:32:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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 60 [2022-02-14 20:32:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:17,816 INFO L225 Difference]: With dead ends: 121 [2022-02-14 20:32:17,816 INFO L226 Difference]: Without dead ends: 121 [2022-02-14 20:32:17,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=468, Invalid=864, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 20:32:17,818 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 262 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:17,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 218 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 20:32:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-14 20:32:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-02-14 20:32:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 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) [2022-02-14 20:32:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-02-14 20:32:17,829 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 60 [2022-02-14 20:32:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:17,829 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-02-14 20:32:17,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2022-02-14 20:32:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-02-14 20:32:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-14 20:32:17,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:17,832 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:17,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 20:32:18,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:18,036 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash 735577605, now seen corresponding path program 4 times [2022-02-14 20:32:18,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:18,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395318939] [2022-02-14 20:32:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:18,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-02-14 20:32:18,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:18,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395318939] [2022-02-14 20:32:18,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395318939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:18,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668607989] [2022-02-14 20:32:18,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 20:32:18,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:18,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:18,709 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) [2022-02-14 20:32:18,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 20:32:20,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 20:32:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:32:20,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-14 20:32:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-02-14 20:32:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-02-14 20:32:21,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668607989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:21,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:21,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-02-14 20:32:21,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150332865] [2022-02-14 20:32:21,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:21,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 20:32:21,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:21,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 20:32:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 20:32:21,576 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 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) [2022-02-14 20:33:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:33:49,971 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2022-02-14 20:33:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-14 20:33:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 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 120 [2022-02-14 20:33:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:33:49,973 INFO L225 Difference]: With dead ends: 241 [2022-02-14 20:33:49,973 INFO L226 Difference]: Without dead ends: 241 [2022-02-14 20:33:49,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 87.3s TimeCoverageRelationStatistics Valid=1800, Invalid=3456, Unknown=0, NotChecked=0, Total=5256 [2022-02-14 20:33:49,982 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1239 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:33:49,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 688 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-14 20:33:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-14 20:33:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-02-14 20:33:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 237 states have internal predecessors, (239), 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) [2022-02-14 20:33:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-02-14 20:33:50,013 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 120 [2022-02-14 20:33:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:33:50,013 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-02-14 20:33:50,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 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) [2022-02-14 20:33:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-02-14 20:33:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-02-14 20:33:50,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:33:50,016 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:33:50,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 20:33:50,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:33:50,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:33:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:33:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1957714869, now seen corresponding path program 5 times [2022-02-14 20:33:50,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:33:50,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869317822] [2022-02-14 20:33:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:33:50,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:33:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:33:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:33:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:33:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-02-14 20:33:51,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:33:51,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869317822] [2022-02-14 20:33:51,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869317822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:33:51,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114050884] [2022-02-14 20:33:51,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 20:33:51,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:33:51,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:33:51,808 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) [2022-02-14 20:33:51,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process