/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-multidimensional/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 23:43:22,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 23:43:22,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 23:43:23,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 23:43:23,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 23:43:23,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 23:43:23,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 23:43:23,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 23:43:23,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 23:43:23,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 23:43:23,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 23:43:23,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 23:43:23,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 23:43:23,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 23:43:23,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 23:43:23,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 23:43:23,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-30 23:43:23,085 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 23:43:23,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 23:43:23,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 23:43:23,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 23:43:23,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 23:43:23,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 23:43:23,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 23:43:23,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 23:43:23,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 23:43:23,119 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 23:43:23,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 23:43:23,120 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 23:43:23,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 23:43:23,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 23:43:23,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 23:43:23,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 23:43:23,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 23:43:23,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 23:43:23,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 23:43:23,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 23:43:23,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 23:43:23,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 23:43:23,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 23:43:23,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 23:43:23,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 23:43:23,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:43:23,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 23:43:23,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 23:43:23,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 23:43:23,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 23:43:23,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 23:43:23,124 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 23:43:23,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 23:43:23,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 23:43:23,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 23:43:23,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 23:43:23,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 23:43:23,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 23:43:23,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 23:43:23,382 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 23:43:23,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2022-01-30 23:43:23,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b27be5a8/00ff09d508234b479b044e6590da52d9/FLAG1132b46d4 [2022-01-30 23:43:23,838 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 23:43:23,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2022-01-30 23:43:23,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b27be5a8/00ff09d508234b479b044e6590da52d9/FLAG1132b46d4 [2022-01-30 23:43:23,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b27be5a8/00ff09d508234b479b044e6590da52d9 [2022-01-30 23:43:23,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 23:43:23,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 23:43:23,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 23:43:23,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 23:43:23,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 23:43:23,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:43:23" (1/1) ... [2022-01-30 23:43:23,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e62cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:23, skipping insertion in model container [2022-01-30 23:43:23,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:43:23" (1/1) ... [2022-01-30 23:43:23,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 23:43:23,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 23:43:24,052 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-multidimensional/init-4-n-u.c[322,335] [2022-01-30 23:43:24,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:43:24,102 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 23:43:24,113 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-multidimensional/init-4-n-u.c[322,335] [2022-01-30 23:43:24,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:43:24,151 INFO L208 MainTranslator]: Completed translation [2022-01-30 23:43:24,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24 WrapperNode [2022-01-30 23:43:24,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 23:43:24,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 23:43:24,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 23:43:24,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 23:43:24,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 23:43:24,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 23:43:24,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 23:43:24,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 23:43:24,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (1/1) ... [2022-01-30 23:43:24,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:43:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:24,228 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 23:43:24,237 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 23:43:24,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 23:43:24,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 23:43:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 23:43:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 23:43:24,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 23:43:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 23:43:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 23:43:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 23:43:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 23:43:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 23:43:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 23:43:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 23:43:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 23:43:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 23:43:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 23:43:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 23:43:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 23:43:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 23:43:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 23:43:24,319 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 23:43:24,321 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 23:43:24,532 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 23:43:24,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 23:43:24,537 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-30 23:43:24,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:43:24 BoogieIcfgContainer [2022-01-30 23:43:24,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 23:43:24,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 23:43:24,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 23:43:24,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 23:43:24,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 11:43:23" (1/3) ... [2022-01-30 23:43:24,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781cf16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:43:24, skipping insertion in model container [2022-01-30 23:43:24,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:43:24" (2/3) ... [2022-01-30 23:43:24,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781cf16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:43:24, skipping insertion in model container [2022-01-30 23:43:24,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:43:24" (3/3) ... [2022-01-30 23:43:24,545 INFO L111 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2022-01-30 23:43:24,549 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 23:43:24,549 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 23:43:24,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 23:43:24,631 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 23:43:24,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 23:43:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 23:43:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 23:43:24,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:24,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:43:24,655 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash -855804756, now seen corresponding path program 1 times [2022-01-30 23:43:24,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:24,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686912926] [2022-01-30 23:43:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:24,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:24,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:24,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059041874] [2022-01-30 23:43:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:24,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:24,779 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 23:43:24,813 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 23:43:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:43:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-30 23:43:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:24,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:43:24,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:24,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686912926] [2022-01-30 23:43:24,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:24,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059041874] [2022-01-30 23:43:24,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059041874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:43:24,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:43:24,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-30 23:43:24,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202949023] [2022-01-30 23:43:24,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:43:24,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-30 23:43:24,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-30 23:43:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 23:43:24,973 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:24,988 INFO L93 Difference]: Finished difference Result 62 states and 95 transitions. [2022-01-30 23:43:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-30 23:43:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-30 23:43:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:24,995 INFO L225 Difference]: With dead ends: 62 [2022-01-30 23:43:24,995 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 23:43:24,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 23:43:25,000 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:25,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:43:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 23:43:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-30 23:43:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 23:43:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-01-30 23:43:25,029 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2022-01-30 23:43:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:25,029 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-01-30 23:43:25,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-01-30 23:43:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 23:43:25,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:25,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:43:25,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:25,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 23:43:25,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash -995658633, now seen corresponding path program 1 times [2022-01-30 23:43:25,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:25,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030479084] [2022-01-30 23:43:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:25,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:25,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:25,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420740793] [2022-01-30 23:43:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:25,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:25,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:25,255 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 23:43:25,257 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 23:43:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:43:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:43:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:25,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:43:25,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:25,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030479084] [2022-01-30 23:43:25,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:25,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420740793] [2022-01-30 23:43:25,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420740793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:43:25,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:43:25,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 23:43:25,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297900915] [2022-01-30 23:43:25,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:43:25,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:43:25,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:43:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:43:25,373 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:25,393 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-01-30 23:43:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:43:25,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-30 23:43:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:25,394 INFO L225 Difference]: With dead ends: 52 [2022-01-30 23:43:25,394 INFO L226 Difference]: Without dead ends: 36 [2022-01-30 23:43:25,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:43:25,396 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:25,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:43:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-30 23:43:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-01-30 23:43:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 23:43:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-30 23:43:25,402 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2022-01-30 23:43:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:25,402 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-30 23:43:25,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-30 23:43:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-30 23:43:25,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:25,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:43:25,431 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 23:43:25,623 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,SelfDestructingSolverStorable1 [2022-01-30 23:43:25,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash -114149760, now seen corresponding path program 1 times [2022-01-30 23:43:25,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206667216] [2022-01-30 23:43:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:25,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:25,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:25,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396020973] [2022-01-30 23:43:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:25,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:25,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:25,642 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) [2022-01-30 23:43:25,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 23:43:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:43:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:43:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:25,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:43:25,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:25,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206667216] [2022-01-30 23:43:25,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:25,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396020973] [2022-01-30 23:43:25,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396020973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:43:25,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:43:25,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 23:43:25,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748344642] [2022-01-30 23:43:25,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:43:25,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 23:43:25,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 23:43:25,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:43:25,749 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:25,785 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-01-30 23:43:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 23:43:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-30 23:43:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:25,787 INFO L225 Difference]: With dead ends: 66 [2022-01-30 23:43:25,788 INFO L226 Difference]: Without dead ends: 43 [2022-01-30 23:43:25,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:43:25,789 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:25,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:43:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-30 23:43:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2022-01-30 23:43:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 23:43:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-30 23:43:25,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2022-01-30 23:43:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:25,798 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-30 23:43:25,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-30 23:43:25,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-30 23:43:25,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:25,799 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] [2022-01-30 23:43:25,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:26,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1565517491, now seen corresponding path program 1 times [2022-01-30 23:43:26,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:26,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044563272] [2022-01-30 23:43:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:26,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:26,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:26,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656115242] [2022-01-30 23:43:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:26,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:26,046 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) [2022-01-30 23:43:26,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 23:43:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:43:26,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:43:26,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:26,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:43:26,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044563272] [2022-01-30 23:43:26,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656115242] [2022-01-30 23:43:26,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656115242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:43:26,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:43:26,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 23:43:26,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817754289] [2022-01-30 23:43:26,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:43:26,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 23:43:26,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 23:43:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:43:26,166 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:26,217 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-01-30 23:43:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 23:43:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-30 23:43:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:26,219 INFO L225 Difference]: With dead ends: 66 [2022-01-30 23:43:26,219 INFO L226 Difference]: Without dead ends: 41 [2022-01-30 23:43:26,219 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 [2022-01-30 23:43:26,222 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:26,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:43:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-30 23:43:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-01-30 23:43:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 23:43:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-30 23:43:26,229 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2022-01-30 23:43:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:26,229 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-30 23:43:26,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-30 23:43:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-30 23:43:26,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:26,230 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] [2022-01-30 23:43:26,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:26,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:26,431 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2102945662, now seen corresponding path program 1 times [2022-01-30 23:43:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759712863] [2022-01-30 23:43:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:26,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:26,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319780404] [2022-01-30 23:43:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:26,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:26,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:26,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:43:26,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 23:43:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:43:26,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:43:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:26,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:43:26,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759712863] [2022-01-30 23:43:26,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319780404] [2022-01-30 23:43:26,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319780404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:43:26,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:43:26,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 23:43:26,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709447657] [2022-01-30 23:43:26,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:43:26,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 23:43:26,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 23:43:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:43:26,578 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:26,610 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-01-30 23:43:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 23:43:26,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-30 23:43:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:26,611 INFO L225 Difference]: With dead ends: 66 [2022-01-30 23:43:26,611 INFO L226 Difference]: Without dead ends: 39 [2022-01-30 23:43:26,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:43:26,612 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:26,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:43:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-30 23:43:26,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-01-30 23:43:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 23:43:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-01-30 23:43:26,619 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2022-01-30 23:43:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:26,620 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-01-30 23:43:26,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-01-30 23:43:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-30 23:43:26,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:26,621 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] [2022-01-30 23:43:26,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:26,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:26,844 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash -407599774, now seen corresponding path program 1 times [2022-01-30 23:43:26,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:26,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634661748] [2022-01-30 23:43:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:26,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:26,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:26,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85253061] [2022-01-30 23:43:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:26,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:26,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:26,856 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:43:26,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 23:43:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:43:26,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:43:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:26,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:43:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:27,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:27,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634661748] [2022-01-30 23:43:27,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:27,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85253061] [2022-01-30 23:43:27,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85253061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:43:27,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:43:27,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 23:43:27,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989210897] [2022-01-30 23:43:27,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:43:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:43:27,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:43:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:43:27,026 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:27,126 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2022-01-30 23:43:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:43:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-30 23:43:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:27,132 INFO L225 Difference]: With dead ends: 78 [2022-01-30 23:43:27,132 INFO L226 Difference]: Without dead ends: 49 [2022-01-30 23:43:27,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-30 23:43:27,135 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 41 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:27,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 89 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:43:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-30 23:43:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-30 23:43:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 23:43:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-01-30 23:43:27,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 26 [2022-01-30 23:43:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:27,145 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-01-30 23:43:27,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-01-30 23:43:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-30 23:43:27,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:27,146 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-01-30 23:43:27,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:27,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:27,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash -722743166, now seen corresponding path program 2 times [2022-01-30 23:43:27,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:27,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583905519] [2022-01-30 23:43:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:27,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:27,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:27,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732538214] [2022-01-30 23:43:27,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:43:27,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:27,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:43:27,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 23:43:27,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:43:27,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:43:27,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 23:43:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:27,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:43:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:43:27,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:27,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583905519] [2022-01-30 23:43:27,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:27,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732538214] [2022-01-30 23:43:27,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732538214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:43:27,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:43:27,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-30 23:43:27,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136908026] [2022-01-30 23:43:27,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:43:27,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 23:43:27,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 23:43:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-30 23:43:27,684 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:27,898 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2022-01-30 23:43:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 23:43:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-30 23:43:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:27,899 INFO L225 Difference]: With dead ends: 114 [2022-01-30 23:43:27,899 INFO L226 Difference]: Without dead ends: 73 [2022-01-30 23:43:27,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-30 23:43:27,901 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:27,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:43:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-30 23:43:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-01-30 23:43:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-30 23:43:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-01-30 23:43:27,917 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 29 [2022-01-30 23:43:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:27,917 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-01-30 23:43:27,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-01-30 23:43:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-30 23:43:27,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:27,918 INFO L514 BasicCegarLoop]: trace histogram [10, 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] [2022-01-30 23:43:27,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:28,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:28,142 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -493509502, now seen corresponding path program 3 times [2022-01-30 23:43:28,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:28,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938102486] [2022-01-30 23:43:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:28,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:28,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:28,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495327576] [2022-01-30 23:43:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:43:28,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:28,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:28,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:43:28,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 23:43:28,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 23:43:28,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:43:28,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:43:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-30 23:43:28,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:43:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-30 23:43:28,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938102486] [2022-01-30 23:43:28,421 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495327576] [2022-01-30 23:43:28,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495327576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:43:28,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:43:28,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-30 23:43:28,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577284084] [2022-01-30 23:43:28,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:43:28,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 23:43:28,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 23:43:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:43:28,424 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:28,475 INFO L93 Difference]: Finished difference Result 175 states and 215 transitions. [2022-01-30 23:43:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 23:43:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-30 23:43:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:28,477 INFO L225 Difference]: With dead ends: 175 [2022-01-30 23:43:28,477 INFO L226 Difference]: Without dead ends: 129 [2022-01-30 23:43:28,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:43:28,480 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:28,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 79 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:43:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-30 23:43:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-01-30 23:43:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 114 states have internal predecessors, (131), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-30 23:43:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-01-30 23:43:28,527 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 35 [2022-01-30 23:43:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:28,528 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-01-30 23:43:28,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-01-30 23:43:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-30 23:43:28,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:28,536 INFO L514 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:43:28,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:28,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-30 23:43:28,762 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash -818263881, now seen corresponding path program 4 times [2022-01-30 23:43:28,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:28,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622808774] [2022-01-30 23:43:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:28,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:28,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:28,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78371100] [2022-01-30 23:43:28,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:43:28,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:28,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:43:28,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 23:43:56,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:43:56,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:43:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 23:43:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:43:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 653 proven. 55 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-01-30 23:43:56,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:43:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 411 proven. 297 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-01-30 23:43:56,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:43:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622808774] [2022-01-30 23:43:56,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:43:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78371100] [2022-01-30 23:43:56,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78371100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:43:56,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:43:56,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-30 23:43:56,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465478549] [2022-01-30 23:43:56,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:43:56,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 23:43:56,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:43:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 23:43:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-30 23:43:56,867 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:43:57,304 INFO L93 Difference]: Finished difference Result 335 states and 457 transitions. [2022-01-30 23:43:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 23:43:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-30 23:43:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:43:57,306 INFO L225 Difference]: With dead ends: 335 [2022-01-30 23:43:57,307 INFO L226 Difference]: Without dead ends: 214 [2022-01-30 23:43:57,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 23:43:57,310 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 101 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:43:57,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:43:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-30 23:43:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-30 23:43:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 186 states have (on average 1.0913978494623655) internal successors, (203), 186 states have internal predecessors, (203), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-30 23:43:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 250 transitions. [2022-01-30 23:43:57,348 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 250 transitions. Word has length 92 [2022-01-30 23:43:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:43:57,348 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 250 transitions. [2022-01-30 23:43:57,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:43:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 250 transitions. [2022-01-30 23:43:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-30 23:43:57,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:43:57,351 INFO L514 BasicCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:43:57,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 23:43:57,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:57,552 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:43:57,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:43:57,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2133924279, now seen corresponding path program 5 times [2022-01-30 23:43:57,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:43:57,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875848103] [2022-01-30 23:43:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:43:57,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:43:57,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:43:57,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823447734] [2022-01-30 23:43:57,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:43:57,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:43:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:43:57,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:43:57,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process