/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-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 01:05:35,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 01:05:35,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 01:05:35,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 01:05:35,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 01:05:35,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 01:05:35,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 01:05:35,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 01:05:35,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 01:05:35,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 01:05:35,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 01:05:35,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 01:05:35,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 01:05:35,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 01:05:35,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 01:05:35,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 01:05:35,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 01:05:35,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 01:05:35,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 01:05:35,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 01:05:35,499 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 [2022-01-31 01:05:35,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 01:05:35,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 01:05:35,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 01:05:35,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 01:05:35,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 01:05:35,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 01:05:35,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 01:05:35,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 01:05:35,540 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 01:05:35,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 01:05:35,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 01:05:35,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 01:05:35,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 01:05:35,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 01:05:35,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 01:05:35,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 01:05:35,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 01:05:35,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 01:05:35,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 01:05:35,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 01:05:35,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 01:05:35,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 01:05:35,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 01:05:35,544 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 01:05:35,544 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 01:05:35,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 01:05:35,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 01:05:35,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 01:05:35,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 01:05:35,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 01:05:35,809 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 01:05:35,810 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 01:05:35,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2022-01-31 01:05:35,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee92cddf/517b8afe5dd2419cb3762cda4999a7a4/FLAG17bde18cf [2022-01-31 01:05:36,316 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 01:05:36,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2022-01-31 01:05:36,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee92cddf/517b8afe5dd2419cb3762cda4999a7a4/FLAG17bde18cf [2022-01-31 01:05:36,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee92cddf/517b8afe5dd2419cb3762cda4999a7a4 [2022-01-31 01:05:36,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 01:05:36,336 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 01:05:36,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 01:05:36,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 01:05:36,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 01:05:36,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7475caf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36, skipping insertion in model container [2022-01-31 01:05:36,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 01:05:36,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 01:05:36,500 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-fpi/ifeqn4f.c[590,603] [2022-01-31 01:05:36,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 01:05:36,521 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 01:05:36,529 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-fpi/ifeqn4f.c[590,603] [2022-01-31 01:05:36,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 01:05:36,547 INFO L208 MainTranslator]: Completed translation [2022-01-31 01:05:36,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36 WrapperNode [2022-01-31 01:05:36,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 01:05:36,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 01:05:36,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 01:05:36,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 01:05:36,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 01:05:36,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 01:05:36,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 01:05:36,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 01:05:36,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (1/1) ... [2022-01-31 01:05:36,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 01:05:36,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:05:36,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 01:05:36,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 01:05:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 01:05:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 01:05:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 01:05:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 01:05:36,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 01:05:36,672 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 01:05:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 01:05:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 01:05:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 01:05:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 01:05:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 01:05:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 01:05:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 01:05:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 01:05:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 01:05:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 01:05:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 01:05:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 01:05:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 01:05:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 01:05:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 01:05:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 01:05:36,733 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 01:05:36,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 01:05:36,918 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 01:05:36,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 01:05:36,923 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 01:05:36,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:05:36 BoogieIcfgContainer [2022-01-31 01:05:36,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 01:05:36,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 01:05:36,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 01:05:36,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 01:05:36,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:05:36" (1/3) ... [2022-01-31 01:05:36,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec9911e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:05:36, skipping insertion in model container [2022-01-31 01:05:36,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:05:36" (2/3) ... [2022-01-31 01:05:36,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec9911e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:05:36, skipping insertion in model container [2022-01-31 01:05:36,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:05:36" (3/3) ... [2022-01-31 01:05:36,960 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2022-01-31 01:05:36,964 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 01:05:36,964 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 01:05:37,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 01:05:37,039 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 [2022-01-31 01:05:37,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 01:05:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 01:05:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 01:05:37,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:05:37,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:05:37,069 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:05:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:05:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1482202103, now seen corresponding path program 1 times [2022-01-31 01:05:37,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:05:37,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496009362] [2022-01-31 01:05:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:37,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:05:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:05:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:37,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:05:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:05:37,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:05:37,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496009362] [2022-01-31 01:05:37,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496009362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:05:37,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:05:37,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 01:05:37,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763865864] [2022-01-31 01:05:37,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:05:37,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 01:05:37,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:05:37,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 01:05:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 01:05:37,344 INFO L87 Difference]: Start difference. First operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:05:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:05:37,430 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-01-31 01:05:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 01:05:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 01:05:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:05:37,441 INFO L225 Difference]: With dead ends: 62 [2022-01-31 01:05:37,441 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 01:05:37,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 01:05:37,449 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:05:37,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:05:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 01:05:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 01:05:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 01:05:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 01:05:37,487 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 01:05:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:05:37,487 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 01:05:37,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:05:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 01:05:37,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 01:05:37,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:05:37,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:05:37,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 01:05:37,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:05:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:05:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash -539484107, now seen corresponding path program 1 times [2022-01-31 01:05:37,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:05:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964317340] [2022-01-31 01:05:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:37,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:05:37,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:05:37,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854286028] [2022-01-31 01:05:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:37,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:05:37,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:05:37,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:05:37,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 01:05:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 01:05:37,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:05:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:05:37,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 01:05:37,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:05:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964317340] [2022-01-31 01:05:37,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:05:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854286028] [2022-01-31 01:05:37,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854286028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:05:37,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:05:37,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 01:05:37,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917175660] [2022-01-31 01:05:37,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:05:37,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 01:05:37,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:05:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 01:05:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:05:37,683 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:05:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:05:37,731 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-01-31 01:05:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 01:05:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 01:05:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:05:37,734 INFO L225 Difference]: With dead ends: 56 [2022-01-31 01:05:37,734 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 01:05:37,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:05:37,735 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 01:05:37,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 01:05:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 01:05:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-01-31 01:05:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 01:05:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 01:05:37,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2022-01-31 01:05:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:05:37,745 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 01:05:37,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:05:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 01:05:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 01:05:37,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:05:37,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:05:37,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 01:05:37,961 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 [2022-01-31 01:05:37,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:05:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:05:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 393970846, now seen corresponding path program 1 times [2022-01-31 01:05:37,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:05:37,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638123166] [2022-01-31 01:05:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:37,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:05:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:38,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:05:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:38,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:05:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:05:38,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:05:38,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638123166] [2022-01-31 01:05:38,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638123166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:05:38,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:05:38,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 01:05:38,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005966318] [2022-01-31 01:05:38,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:05:38,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 01:05:38,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:05:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 01:05:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:05:38,056 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:05:38,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:05:38,129 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-01-31 01:05:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 01:05:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 01:05:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:05:38,133 INFO L225 Difference]: With dead ends: 60 [2022-01-31 01:05:38,133 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 01:05:38,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:05:38,137 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:05:38,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:05:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 01:05:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-01-31 01:05:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 01:05:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 01:05:38,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2022-01-31 01:05:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:05:38,147 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 01:05:38,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:05:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 01:05:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 01:05:38,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:05:38,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:05:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 01:05:38,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:05:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:05:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash -286087524, now seen corresponding path program 1 times [2022-01-31 01:05:38,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:05:38,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861508750] [2022-01-31 01:05:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:38,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:05:38,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:05:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455561247] [2022-01-31 01:05:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:38,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:05:38,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:05:38,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:05:38,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 01:05:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 01:05:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:05:38,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:05:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:05:38,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:05:38,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-31 01:05:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:05:38,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 01:05:38,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:05:38,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861508750] [2022-01-31 01:05:38,428 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:05:38,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455561247] [2022-01-31 01:05:38,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455561247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:05:38,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:05:38,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 01:05:38,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683732771] [2022-01-31 01:05:38,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:05:38,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 01:05:38,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:05:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 01:05:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 01:05:38,431 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:05:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:05:38,507 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-01-31 01:05:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 01:05:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 01:05:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:05:38,509 INFO L225 Difference]: With dead ends: 46 [2022-01-31 01:05:38,509 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 01:05:38,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-31 01:05:38,510 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:05:38,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 153 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:05:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 01:05:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-01-31 01:05:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 01:05:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 01:05:38,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2022-01-31 01:05:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:05:38,517 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 01:05:38,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:05:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 01:05:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 01:05:38,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:05:38,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:05:38,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 01:05:38,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 01:05:38,748 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:05:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:05:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -600633998, now seen corresponding path program 1 times [2022-01-31 01:05:38,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:05:38,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484131822] [2022-01-31 01:05:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:38,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:05:38,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:05:38,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108112111] [2022-01-31 01:05:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:38,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:05:38,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:05:38,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:05:38,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 01:05:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:05:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 01:05:38,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:05:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:05:38,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:05:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:05:39,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:05:39,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484131822] [2022-01-31 01:05:39,100 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:05:39,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108112111] [2022-01-31 01:05:39,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108112111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:05:39,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:05:39,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 01:05:39,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784327852] [2022-01-31 01:05:39,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:05:39,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 01:05:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:05:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 01:05:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 01:05:39,102 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:05:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:05:39,230 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2022-01-31 01:05:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 01:05:39,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2022-01-31 01:05:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:05:39,234 INFO L225 Difference]: With dead ends: 91 [2022-01-31 01:05:39,234 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 01:05:39,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 01:05:39,236 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:05:39,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 99 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:05:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 01:05:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-01-31 01:05:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 01:05:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-01-31 01:05:39,243 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2022-01-31 01:05:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:05:39,243 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-01-31 01:05:39,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:05:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-01-31 01:05:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 01:05:39,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:05:39,244 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:05:39,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 01:05:39,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:05:39,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:05:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:05:39,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1462132655, now seen corresponding path program 1 times [2022-01-31 01:05:39,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:05:39,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069025758] [2022-01-31 01:05:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:39,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:05:39,481 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:05:39,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924778208] [2022-01-31 01:05:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:05:39,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:05:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:05:39,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:05:39,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 01:05:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 01:05:39,551 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 01:05:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 01:05:39,592 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 01:05:39,592 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 01:05:39,593 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 01:05:39,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 01:05:39,819 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 [2022-01-31 01:05:39,822 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-01-31 01:05:39,825 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 01:05:39,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:05:39 BoogieIcfgContainer [2022-01-31 01:05:39,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 01:05:39,853 INFO L158 Benchmark]: Toolchain (without parser) took 3517.08ms. Allocated memory was 182.5MB in the beginning and 264.2MB in the end (delta: 81.8MB). Free memory was 130.6MB in the beginning and 202.8MB in the end (delta: -72.2MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-01-31 01:05:39,853 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 01:05:39,853 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.19ms. Allocated memory is still 182.5MB. Free memory was 130.4MB in the beginning and 154.0MB in the end (delta: -23.6MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-01-31 01:05:39,854 INFO L158 Benchmark]: Boogie Preprocessor took 37.21ms. Allocated memory is still 182.5MB. Free memory was 154.0MB in the beginning and 152.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 01:05:39,854 INFO L158 Benchmark]: RCFGBuilder took 338.79ms. Allocated memory is still 182.5MB. Free memory was 152.4MB in the beginning and 140.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 01:05:39,854 INFO L158 Benchmark]: TraceAbstraction took 2926.37ms. Allocated memory was 182.5MB in the beginning and 264.2MB in the end (delta: 81.8MB). Free memory was 140.4MB in the beginning and 202.8MB in the end (delta: -62.4MB). Peak memory consumption was 20.4MB. Max. memory is 8.0GB. [2022-01-31 01:05:39,855 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.19ms. Allocated memory is still 182.5MB. Free memory was 130.4MB in the beginning and 154.0MB in the end (delta: -23.6MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.21ms. Allocated memory is still 182.5MB. Free memory was 154.0MB in the beginning and 152.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 338.79ms. Allocated memory is still 182.5MB. Free memory was 152.4MB in the beginning and 140.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 2926.37ms. Allocated memory was 182.5MB in the beginning and 264.2MB in the end (delta: 81.8MB). Free memory was 140.4MB in the beginning and 202.8MB in the end (delta: -62.4MB). Peak memory consumption was 20.4MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=6, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=0, N=2] [L31] COND TRUE i