/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/xor5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 23:23:59,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 23:23:59,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 23:23:59,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 23:23:59,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 23:23:59,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 23:23:59,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 23:23:59,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 23:23:59,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 23:23:59,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 23:23:59,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 23:23:59,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 23:23:59,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 23:23:59,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 23:23:59,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 23:23:59,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 23:23:59,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-30 23:23:59,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 23:23:59,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 23:23:59,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 23:23:59,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 23:23:59,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 23:23:59,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 23:23:59,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 23:23:59,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 23:23:59,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 23:23:59,595 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 23:23:59,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 23:23:59,596 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 23:23:59,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:23:59,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 23:23:59,597 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 23:23:59,598 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 23:23:59,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 23:23:59,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 23:23:59,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 23:23:59,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 23:23:59,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 23:23:59,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 23:23:59,768 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 23:23:59,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor5.i [2022-01-30 23:23:59,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a636c51c/3bb99ff397b14db281fe68aa711d3c41/FLAGf3b4bdf47 [2022-01-30 23:24:00,168 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 23:24:00,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i [2022-01-30 23:24:00,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a636c51c/3bb99ff397b14db281fe68aa711d3c41/FLAGf3b4bdf47 [2022-01-30 23:24:00,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a636c51c/3bb99ff397b14db281fe68aa711d3c41 [2022-01-30 23:24:00,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 23:24:00,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 23:24:00,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 23:24:00,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 23:24:00,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 23:24:00,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f658ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00, skipping insertion in model container [2022-01-30 23:24:00,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 23:24:00,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 23:24:00,791 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i[1364,1377] [2022-01-30 23:24:00,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:24:00,798 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 23:24:00,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i[1364,1377] [2022-01-30 23:24:00,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:24:00,830 INFO L208 MainTranslator]: Completed translation [2022-01-30 23:24:00,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00 WrapperNode [2022-01-30 23:24:00,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 23:24:00,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 23:24:00,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 23:24:00,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 23:24:00,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 23:24:00,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 23:24:00,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 23:24:00,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 23:24:00,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (1/1) ... [2022-01-30 23:24:00,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:24:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:24:00,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 23:24:00,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 23:24:00,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 23:24:00,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 23:24:00,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 23:24:00,911 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-01-30 23:24:00,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 23:24:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 23:24:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 23:24:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 23:24:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 23:24:00,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 23:24:00,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 23:24:00,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 23:24:00,977 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 23:24:00,978 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 23:24:01,089 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 23:24:01,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 23:24:01,094 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 23:24:01,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:24:01 BoogieIcfgContainer [2022-01-30 23:24:01,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 23:24:01,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 23:24:01,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 23:24:01,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 23:24:01,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 11:24:00" (1/3) ... [2022-01-30 23:24:01,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88a9bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:24:01, skipping insertion in model container [2022-01-30 23:24:01,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:24:00" (2/3) ... [2022-01-30 23:24:01,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88a9bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:24:01, skipping insertion in model container [2022-01-30 23:24:01,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:24:01" (3/3) ... [2022-01-30 23:24:01,101 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2022-01-30 23:24:01,105 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 23:24:01,105 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 23:24:01,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 23:24:01,141 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 23:24:01,141 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 23:24:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 23:24:01,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-30 23:24:01,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:24:01,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:24:01,156 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:24:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:24:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 519247409, now seen corresponding path program 1 times [2022-01-30 23:24:01,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:24:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418148048] [2022-01-30 23:24:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:24:01,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:24:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:24:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 23:24:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 23:24:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-30 23:24:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:24:01,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:24:01,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418148048] [2022-01-30 23:24:01,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418148048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:24:01,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:24:01,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 23:24:01,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654087298] [2022-01-30 23:24:01,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:24:01,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 23:24:01,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:24:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 23:24:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:24:01,471 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:24:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:24:01,532 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2022-01-30 23:24:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 23:24:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-01-30 23:24:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:24:01,538 INFO L225 Difference]: With dead ends: 59 [2022-01-30 23:24:01,538 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 23:24:01,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:24:01,543 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:24:01,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:24:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 23:24:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-30 23:24:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:24:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 23:24:01,567 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 33 [2022-01-30 23:24:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:24:01,567 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 23:24:01,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:24:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 23:24:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-30 23:24:01,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:24:01,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:24:01,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 23:24:01,569 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:24:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:24:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1343899725, now seen corresponding path program 1 times [2022-01-30 23:24:01,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:24:01,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164237422] [2022-01-30 23:24:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:24:01,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:24:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:24:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-30 23:24:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-30 23:24:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-30 23:24:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-30 23:24:01,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:24:01,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164237422] [2022-01-30 23:24:01,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164237422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:24:01,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689028861] [2022-01-30 23:24:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:24:01,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:24:01,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:24:01,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:24:01,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 23:24:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:01,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:24:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:24:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:24:01,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:24:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:24:01,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689028861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:24:01,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:24:01,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-01-30 23:24:01,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947065060] [2022-01-30 23:24:01,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:24:01,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-30 23:24:01,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:24:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-30 23:24:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-30 23:24:01,937 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-30 23:24:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:24:02,038 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-01-30 23:24:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-30 23:24:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 35 [2022-01-30 23:24:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:24:02,040 INFO L225 Difference]: With dead ends: 51 [2022-01-30 23:24:02,040 INFO L226 Difference]: Without dead ends: 33 [2022-01-30 23:24:02,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-30 23:24:02,041 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:24:02,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 68 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:24:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-30 23:24:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-01-30 23:24:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:24:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-30 23:24:02,046 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 35 [2022-01-30 23:24:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:24:02,047 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-30 23:24:02,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-30 23:24:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-30 23:24:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-30 23:24:02,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:24:02,048 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:24:02,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 23:24:02,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:24:02,266 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:24:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:24:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash -534618029, now seen corresponding path program 1 times [2022-01-30 23:24:02,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:24:02,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547071799] [2022-01-30 23:24:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:24:02,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:24:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:02,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:24:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:02,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-30 23:24:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:02,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 23:24:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:02,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-30 23:24:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-30 23:24:02,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:24:02,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547071799] [2022-01-30 23:24:02,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547071799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:24:02,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435786965] [2022-01-30 23:24:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:24:02,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:24:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:24:02,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:24:02,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 23:24:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:24:02,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:24:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:24:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 23:24:02,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:24:02,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435786965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:24:02,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:24:02,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-01-30 23:24:02,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037715718] [2022-01-30 23:24:02,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:24:02,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 23:24:02,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:24:02,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 23:24:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-30 23:24:02,524 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 23:24:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:24:02,548 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-01-30 23:24:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 23:24:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2022-01-30 23:24:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:24:02,549 INFO L225 Difference]: With dead ends: 46 [2022-01-30 23:24:02,550 INFO L226 Difference]: Without dead ends: 33 [2022-01-30 23:24:02,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-30 23:24:02,551 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:24:02,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:24:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-30 23:24:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-30 23:24:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:24:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-30 23:24:02,556 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 43 [2022-01-30 23:24:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:24:02,557 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-30 23:24:02,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 23:24:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-30 23:24:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-30 23:24:02,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:24:02,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:24:02,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 23:24:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-30 23:24:02,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:24:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:24:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1631738993, now seen corresponding path program 1 times [2022-01-30 23:24:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:24:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107989753] [2022-01-30 23:24:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:24:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:24:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-30 23:24:02,811 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-30 23:24:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-30 23:24:02,873 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-30 23:24:02,874 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-30 23:24:02,874 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-30 23:24:02,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-30 23:24:02,878 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-30 23:24:02,880 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-30 23:24:02,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.01 11:24:02 BoogieIcfgContainer [2022-01-30 23:24:02,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-30 23:24:02,904 INFO L158 Benchmark]: Toolchain (without parser) took 2298.45ms. Allocated memory was 197.1MB in the beginning and 243.3MB in the end (delta: 46.1MB). Free memory was 138.8MB in the beginning and 93.7MB in the end (delta: 45.1MB). Peak memory consumption was 91.4MB. Max. memory is 8.0GB. [2022-01-30 23:24:02,904 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 155.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-30 23:24:02,905 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.45ms. Allocated memory was 197.1MB in the beginning and 243.3MB in the end (delta: 46.1MB). Free memory was 138.6MB in the beginning and 214.0MB in the end (delta: -75.4MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. [2022-01-30 23:24:02,905 INFO L158 Benchmark]: Boogie Preprocessor took 22.32ms. Allocated memory is still 243.3MB. Free memory was 214.0MB in the beginning and 212.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-30 23:24:02,905 INFO L158 Benchmark]: RCFGBuilder took 241.84ms. Allocated memory is still 243.3MB. Free memory was 212.2MB in the beginning and 199.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-30 23:24:02,906 INFO L158 Benchmark]: TraceAbstraction took 1807.14ms. Allocated memory is still 243.3MB. Free memory was 198.5MB in the beginning and 93.7MB in the end (delta: 104.9MB). Peak memory consumption was 104.9MB. Max. memory is 8.0GB. [2022-01-30 23:24:02,907 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 155.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 223.45ms. Allocated memory was 197.1MB in the beginning and 243.3MB in the end (delta: 46.1MB). Free memory was 138.6MB in the beginning and 214.0MB in the end (delta: -75.4MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.32ms. Allocated memory is still 243.3MB. Free memory was 214.0MB in the beginning and 212.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 241.84ms. Allocated memory is still 243.3MB. Free memory was 212.2MB in the beginning and 199.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 1807.14ms. Allocated memory is still 243.3MB. Free memory was 198.5MB in the beginning and 93.7MB in the end (delta: 104.9MB). Peak memory consumption was 104.9MB. 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 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseXor at line 25. Possible FailurePath: [L17] int N; VAL [\old(N)=4294967298, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [\old(N)=0, i=0, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [\old(N)=0, i=1, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [\old(N)=0, i=2, N=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [\old(N)=0, N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [\old(N)=0, i=1, N=2, res=-2, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [\old(N)=0, i=2, N=2, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={9:0}, x={9:0}] [L27] return res; VAL [\old(N)=0, \result=-4, i=2, N=2, res=4294967292, x={9:0}, x={9:0}] [L45] RET, EXPR xor(x) VAL [\old(N)=0, i=2, N=2, x={9:0}, xor(x)=-4] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [\old(N)=0, i=2, N=2, ret=-4, temp=-2, x={9:0}] [L48] CALL, EXPR xor(x) VAL [\old(N)=0, N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [\old(N)=0, i=1, N=2, res=-3, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [\old(N)=0, i=2, N=2, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={9:0}, x={9:0}] [L27] return res; VAL [\old(N)=0, \result=-5, i=2, N=2, res=4294967291, x={9:0}, x={9:0}] [L48] RET, EXPR xor(x) VAL [\old(N)=0, i=2, N=2, ret=-4, temp=-2, x={9:0}, xor(x)=-5] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [\old(N)=0, i=0, i=2, N=2, ret=-4, ret2=-5, temp=-3, x={9:0}] [L50] COND TRUE i