/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/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:51:03,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:51:03,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:51:03,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:51:03,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:51:03,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:51:03,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:51:03,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:51:03,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:51:03,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:51:03,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:51:03,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:51:03,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:51:03,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:51:03,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:51:03,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:51:03,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:51:03,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:51:03,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:51:03,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:51:03,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:51:03,512 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:51:03,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:51:03,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:51:03,514 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:51:03,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:51:03,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:51:03,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:51:03,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:51:03,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:51:03,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:51:03,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:51:03,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:51:03,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:51:03,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:51:03,516 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:51:03,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:51:03,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:51:03,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:51:03,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:51:03,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:51:03,755 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:51:03,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2022-02-14 20:51:03,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5509ef6f/9a7281286cef45bbab4265a60beee9ce/FLAG611da57fa [2022-02-14 20:51:04,119 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:51:04,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2022-02-14 20:51:04,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5509ef6f/9a7281286cef45bbab4265a60beee9ce/FLAG611da57fa [2022-02-14 20:51:04,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5509ef6f/9a7281286cef45bbab4265a60beee9ce [2022-02-14 20:51:04,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:51:04,552 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:51:04,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:51:04,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:51:04,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:51:04,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9abe450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04, skipping insertion in model container [2022-02-14 20:51:04,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:51:04,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:51:04,756 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i[893,906] [2022-02-14 20:51:04,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:51:04,776 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:51:04,783 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i[893,906] [2022-02-14 20:51:04,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:51:04,794 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:51:04,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04 WrapperNode [2022-02-14 20:51:04,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:51:04,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:51:04,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:51:04,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:51:04,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:51:04,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:51:04,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:51:04,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:51:04,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (1/1) ... [2022-02-14 20:51:04,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:51:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:04,853 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 20:51:04,870 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 20:51:04,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:51:04,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:51:04,896 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:51:04,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 20:51:04,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:51:04,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:51:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:51:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:51:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:51:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:51:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:51:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:51:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 20:51:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:51:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 20:51:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:51:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:51:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:51:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:51:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:51:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:51:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:51:04,944 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:51:04,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:51:05,092 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:51:05,096 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:51:05,096 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 20:51:05,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:05 BoogieIcfgContainer [2022-02-14 20:51:05,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:51:05,098 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:51:05,098 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:51:05,116 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:51:05,118 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:05" (1/1) ... [2022-02-14 20:51:05,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:51:05 BasicIcfg [2022-02-14 20:51:05,129 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:51:05,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:51:05,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:51:05,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:51:05,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:51:04" (1/4) ... [2022-02-14 20:51:05,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef67c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:51:05, skipping insertion in model container [2022-02-14 20:51:05,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:04" (2/4) ... [2022-02-14 20:51:05,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef67c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:51:05, skipping insertion in model container [2022-02-14 20:51:05,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:05" (3/4) ... [2022-02-14 20:51:05,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef67c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:51:05, skipping insertion in model container [2022-02-14 20:51:05,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:51:05" (4/4) ... [2022-02-14 20:51:05,150 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.iJordan [2022-02-14 20:51:05,154 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:51:05,154 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:51:05,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:51:05,200 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 20:51:05,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:51:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:51:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 20:51:05,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:05,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:05,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:05,229 INFO L85 PathProgramCache]: Analyzing trace with hash -340968139, now seen corresponding path program 1 times [2022-02-14 20:51:05,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:05,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218866896] [2022-02-14 20:51:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:05,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:05,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:05,499 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 20:51:05,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:05,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218866896] [2022-02-14 20:51:05,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218866896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:05,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:05,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 20:51:05,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767983954] [2022-02-14 20:51:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:05,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 20:51:05,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 20:51:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-14 20:51:05,527 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 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 20:51:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:05,768 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-02-14 20:51:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 20:51:05,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 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 18 [2022-02-14 20:51:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:05,775 INFO L225 Difference]: With dead ends: 49 [2022-02-14 20:51:05,775 INFO L226 Difference]: Without dead ends: 41 [2022-02-14 20:51:05,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:51:05,787 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:05,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 54 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-14 20:51:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-02-14 20:51:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 20:51:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-02-14 20:51:05,812 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2022-02-14 20:51:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:05,813 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-02-14 20:51:05,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 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 20:51:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-02-14 20:51:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 20:51:05,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:05,814 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:05,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:51:05,814 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1058544685, now seen corresponding path program 1 times [2022-02-14 20:51:05,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:05,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456033458] [2022-02-14 20:51:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:05,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:05,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:05,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456033458] [2022-02-14 20:51:05,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456033458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:05,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231667454] [2022-02-14 20:51:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:05,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:05,901 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 20:51:05,902 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 20:51:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 20:51:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:06,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 20:51:06,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231667454] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:06,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 20:51:06,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-02-14 20:51:06,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801735682] [2022-02-14 20:51:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:06,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 20:51:06,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 20:51:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:51:06,121 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 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 20:51:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:06,172 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-02-14 20:51:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:51:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 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 21 [2022-02-14 20:51:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:06,174 INFO L225 Difference]: With dead ends: 47 [2022-02-14 20:51:06,174 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 20:51:06,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-14 20:51:06,176 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:06,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:51:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 20:51:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-02-14 20:51:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:51:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-14 20:51:06,180 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-02-14 20:51:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:06,181 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-14 20:51:06,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 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 20:51:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-14 20:51:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-14 20:51:06,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:06,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:06,199 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 20:51:06,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:06,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1484070290, now seen corresponding path program 1 times [2022-02-14 20:51:06,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:06,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138521698] [2022-02-14 20:51:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-14 20:51:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:06,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:06,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138521698] [2022-02-14 20:51:06,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138521698] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:06,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995894143] [2022-02-14 20:51:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:06,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:06,520 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 20:51:06,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:51:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 20:51:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 20:51:06,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 20:51:06,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995894143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:06,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 20:51:06,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-02-14 20:51:06,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345737670] [2022-02-14 20:51:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:06,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:51:06,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:51:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-14 20:51:06,609 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:51:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:06,617 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-02-14 20:51:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:51:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-14 20:51:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:06,618 INFO L225 Difference]: With dead ends: 33 [2022-02-14 20:51:06,618 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 20:51:06,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-14 20:51:06,619 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:06,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:51:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 20:51:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-14 20:51:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:51:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-14 20:51:06,623 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-02-14 20:51:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-14 20:51:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:51:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-14 20:51:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 20:51:06,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:06,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:06,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 20:51:06,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 20:51:06,841 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 551024538, now seen corresponding path program 1 times [2022-02-14 20:51:06,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:06,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651898372] [2022-02-14 20:51:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 20:51:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:06,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:06,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651898372] [2022-02-14 20:51:06,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651898372] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:06,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61034819] [2022-02-14 20:51:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:06,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:06,934 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 20:51:06,947 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 20:51:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 20:51:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:07,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:51:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:07,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61034819] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:51:07,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:51:07,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-02-14 20:51:07,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646723773] [2022-02-14 20:51:07,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:51:07,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 20:51:07,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 20:51:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:51:07,259 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:51:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:07,455 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-02-14 20:51:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 20:51:07,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-02-14 20:51:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:07,456 INFO L225 Difference]: With dead ends: 47 [2022-02-14 20:51:07,456 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 20:51:07,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-02-14 20:51:07,457 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:07,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 40 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 20:51:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-02-14 20:51:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 20:51:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-02-14 20:51:07,461 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2022-02-14 20:51:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:07,461 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-02-14 20:51:07,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:51:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-02-14 20:51:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 20:51:07,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:07,462 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:07,484 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 20:51:07,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:07,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1358482081, now seen corresponding path program 1 times [2022-02-14 20:51:07,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:07,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231943759] [2022-02-14 20:51:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:51:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 20:51:07,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:07,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231943759] [2022-02-14 20:51:07,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231943759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:07,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:07,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 20:51:07,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093754346] [2022-02-14 20:51:07,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:07,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 20:51:07,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 20:51:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 20:51:07,707 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:51:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:07,760 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-02-14 20:51:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 20:51:07,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-02-14 20:51:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:07,761 INFO L225 Difference]: With dead ends: 41 [2022-02-14 20:51:07,761 INFO L226 Difference]: Without dead ends: 41 [2022-02-14 20:51:07,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:51:07,761 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:07,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:51:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-14 20:51:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-14 20:51:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 20:51:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-02-14 20:51:07,765 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2022-02-14 20:51:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:07,765 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-02-14 20:51:07,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:51:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-02-14 20:51:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 20:51:07,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:07,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:07,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-14 20:51:07,766 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1686349908, now seen corresponding path program 2 times [2022-02-14 20:51:07,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:07,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710971401] [2022-02-14 20:51:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 20:51:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 20:51:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-14 20:51:07,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:07,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710971401] [2022-02-14 20:51:07,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710971401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:07,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309148999] [2022-02-14 20:51:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:51:07,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:07,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:07,847 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 20:51:07,848 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 20:51:07,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-02-14 20:51:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:51:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 20:51:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-14 20:51:07,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:51:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-14 20:51:08,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309148999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:51:08,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:51:08,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-02-14 20:51:08,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487903109] [2022-02-14 20:51:08,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:51:08,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 20:51:08,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 20:51:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-14 20:51:08,083 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 18 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-14 20:51:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:08,327 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-02-14 20:51:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 20:51:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-02-14 20:51:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:08,329 INFO L225 Difference]: With dead ends: 40 [2022-02-14 20:51:08,329 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 20:51:08,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-02-14 20:51:08,330 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:08,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 70 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 20:51:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 20:51:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 20:51:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 20:51:08,331 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2022-02-14 20:51:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:08,331 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 20:51:08,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-14 20:51:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 20:51:08,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 20:51:08,333 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 20:51:08,365 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 20:51:08,550 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 20:51:08,552 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-02-14 20:51:08,553 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 20:51:08,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:51:08 BasicIcfg [2022-02-14 20:51:08,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 20:51:08,555 INFO L158 Benchmark]: Toolchain (without parser) took 4003.66ms. Allocated memory was 228.6MB in the beginning and 302.0MB in the end (delta: 73.4MB). Free memory was 180.0MB in the beginning and 218.2MB in the end (delta: -38.2MB). Peak memory consumption was 36.8MB. Max. memory is 8.0GB. [2022-02-14 20:51:08,555 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 228.6MB. Free memory is still 196.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:51:08,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.77ms. Allocated memory is still 228.6MB. Free memory was 179.8MB in the beginning and 205.4MB in the end (delta: -25.5MB). Peak memory consumption was 7.9MB. Max. memory is 8.0GB. [2022-02-14 20:51:08,556 INFO L158 Benchmark]: Boogie Preprocessor took 34.24ms. Allocated memory is still 228.6MB. Free memory was 205.4MB in the beginning and 203.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 20:51:08,556 INFO L158 Benchmark]: RCFGBuilder took 266.80ms. Allocated memory is still 228.6MB. Free memory was 203.7MB in the beginning and 192.3MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 20:51:08,556 INFO L158 Benchmark]: IcfgTransformer took 31.12ms. Allocated memory is still 228.6MB. Free memory was 192.3MB in the beginning and 191.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 20:51:08,556 INFO L158 Benchmark]: TraceAbstraction took 3425.11ms. Allocated memory was 228.6MB in the beginning and 302.0MB in the end (delta: 73.4MB). Free memory was 190.8MB in the beginning and 218.2MB in the end (delta: -27.4MB). Peak memory consumption was 46.8MB. Max. memory is 8.0GB. [2022-02-14 20:51:08,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 228.6MB. Free memory is still 196.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 240.77ms. Allocated memory is still 228.6MB. Free memory was 179.8MB in the beginning and 205.4MB in the end (delta: -25.5MB). Peak memory consumption was 7.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.24ms. Allocated memory is still 228.6MB. Free memory was 205.4MB in the beginning and 203.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 266.80ms. Allocated memory is still 228.6MB. Free memory was 203.7MB in the beginning and 192.3MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 31.12ms. Allocated memory is still 228.6MB. Free memory was 192.3MB in the beginning and 191.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3425.11ms. Allocated memory was 228.6MB in the beginning and 302.0MB in the end (delta: 73.4MB). Free memory was 190.8MB in the beginning and 218.2MB in the end (delta: -27.4MB). Peak memory consumption was 46.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 198 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 193 mSDsluCounter, 348 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 623 IncrementalHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 125 mSDtfsCounter, 623 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 282 NumberOfCodeBlocks, 259 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 903 SizeOfPredicates, 12 NumberOfNonLiveVariables, 348 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 101/130 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 20:51:08,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...