/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/nla-digbench-scaling/lcm2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 15:21:12,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 15:21:12,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 15:21:12,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 15:21:12,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 15:21:12,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 15:21:12,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 15:21:12,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 15:21:12,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 15:21:12,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 15:21:12,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 15:21:12,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 15:21:12,136 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 15:21:12,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 15:21:12,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 15:21:12,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 15:21:12,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 15:21:12,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 15:21:12,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 15:21:12,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 15:21:12,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 15:21:12,151 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 [2022-03-18 15:21:12,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 15:21:12,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 15:21:12,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 15:21:12,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 15:21:12,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 15:21:12,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 15:21:12,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 15:21:12,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 15:21:12,174 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 15:21:12,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 15:21:12,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 15:21:12,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 15:21:12,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 15:21:12,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 15:21:12,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 15:21:12,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 15:21:12,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 15:21:12,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 15:21:12,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 15:21:12,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 15:21:12,178 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 15:21:12,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 15:21:12,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 15:21:12,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 15:21:12,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 15:21:12,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 15:21:12,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 15:21:12,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 15:21:12,363 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 15:21:12,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c [2022-03-18 15:21:12,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20a7f52ad/613a574b1fbe4291b9c3f31914200ac9/FLAGba772ec20 [2022-03-18 15:21:12,792 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 15:21:12,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c [2022-03-18 15:21:12,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20a7f52ad/613a574b1fbe4291b9c3f31914200ac9/FLAGba772ec20 [2022-03-18 15:21:12,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20a7f52ad/613a574b1fbe4291b9c3f31914200ac9 [2022-03-18 15:21:12,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 15:21:12,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 15:21:12,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 15:21:12,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 15:21:12,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 15:21:12,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:21:12" (1/1) ... [2022-03-18 15:21:12,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed28f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:12, skipping insertion in model container [2022-03-18 15:21:12,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:21:12" (1/1) ... [2022-03-18 15:21:12,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 15:21:12,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 15:21:12,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c[537,550] [2022-03-18 15:21:12,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 15:21:13,001 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 15:21:13,012 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c[537,550] [2022-03-18 15:21:13,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 15:21:13,035 INFO L208 MainTranslator]: Completed translation [2022-03-18 15:21:13,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13 WrapperNode [2022-03-18 15:21:13,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 15:21:13,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 15:21:13,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 15:21:13,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 15:21:13,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 15:21:13,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 15:21:13,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 15:21:13,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 15:21:13,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (1/1) ... [2022-03-18 15:21:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 15:21:13,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:21:13,098 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) [2022-03-18 15:21:13,123 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 [2022-03-18 15:21:13,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 15:21:13,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 15:21:13,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 15:21:13,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 15:21:13,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 15:21:13,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 15:21:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 15:21:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 15:21:13,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 15:21:13,187 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 15:21:13,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 15:21:13,277 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 15:21:13,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 15:21:13,297 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 15:21:13,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:21:13 BoogieIcfgContainer [2022-03-18 15:21:13,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 15:21:13,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 15:21:13,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 15:21:13,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 15:21:13,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:21:12" (1/3) ... [2022-03-18 15:21:13,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8244e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:21:13, skipping insertion in model container [2022-03-18 15:21:13,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:21:13" (2/3) ... [2022-03-18 15:21:13,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8244e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:21:13, skipping insertion in model container [2022-03-18 15:21:13,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:21:13" (3/3) ... [2022-03-18 15:21:13,303 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound10.c [2022-03-18 15:21:13,306 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 15:21:13,306 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 15:21:13,349 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 15:21:13,353 INFO L340 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 [2022-03-18 15:21:13,353 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 15:21:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 15:21:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 15:21:13,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:21:13,369 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:21:13,369 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:21:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:21:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2022-03-18 15:21:13,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:21:13,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18925289] [2022-03-18 15:21:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:21:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:13,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 15:21:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:13,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 15:21:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:13,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 15:21:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:13,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 15:21:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:13,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 15:21:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 15:21:13,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:21:13,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18925289] [2022-03-18 15:21:13,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18925289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 15:21:13,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 15:21:13,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 15:21:13,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253582771] [2022-03-18 15:21:13,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 15:21:13,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 15:21:13,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:21:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 15:21:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 15:21:13,540 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 15:21:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:21:13,625 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2022-03-18 15:21:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 15:21:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-18 15:21:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:21:13,632 INFO L225 Difference]: With dead ends: 58 [2022-03-18 15:21:13,632 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 15:21:13,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 15:21:13,637 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 15:21:13,637 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 15:21:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 15:21:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-18 15:21:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 15:21:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-03-18 15:21:13,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2022-03-18 15:21:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:21:13,666 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-03-18 15:21:13,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 15:21:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-03-18 15:21:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 15:21:13,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:21:13,669 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:21:13,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 15:21:13,669 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:21:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:21:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2022-03-18 15:21:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:21:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001692840] [2022-03-18 15:21:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:21:13,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:21:13,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130979636] [2022-03-18 15:21:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:13,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:21:13,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:21:13,717 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) [2022-03-18 15:21:13,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 15:21:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:13,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 15:21:13,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:21:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 15:21:13,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 15:21:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:21:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001692840] [2022-03-18 15:21:13,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:21:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130979636] [2022-03-18 15:21:13,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130979636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 15:21:13,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 15:21:13,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 15:21:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189957980] [2022-03-18 15:21:13,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 15:21:13,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 15:21:13,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:21:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 15:21:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 15:21:13,964 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 15:21:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:21:13,973 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-03-18 15:21:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 15:21:13,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 15:21:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:21:13,974 INFO L225 Difference]: With dead ends: 36 [2022-03-18 15:21:13,974 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 15:21:13,974 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 15:21:13,975 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 15:21:13,975 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 15:21:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 15:21:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-18 15:21:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 15:21:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-03-18 15:21:13,980 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2022-03-18 15:21:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:21:13,981 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-03-18 15:21:13,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 15:21:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-03-18 15:21:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 15:21:13,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:21:13,982 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:21:14,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 15:21:14,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:21:14,200 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:21:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:21:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 1 times [2022-03-18 15:21:14,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:21:14,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144091265] [2022-03-18 15:21:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:14,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:21:14,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:21:14,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929682430] [2022-03-18 15:21:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:14,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:21:14,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:21:14,232 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) [2022-03-18 15:21:14,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 15:21:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 15:21:14,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:21:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 15:21:14,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 15:21:14,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:21:14,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144091265] [2022-03-18 15:21:14,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:21:14,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929682430] [2022-03-18 15:21:14,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929682430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 15:21:14,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 15:21:14,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 15:21:14,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716281028] [2022-03-18 15:21:14,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 15:21:14,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 15:21:14,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:21:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 15:21:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 15:21:14,465 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 15:21:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:21:14,511 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-03-18 15:21:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 15:21:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-18 15:21:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:21:14,513 INFO L225 Difference]: With dead ends: 39 [2022-03-18 15:21:14,513 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 15:21:14,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 15:21:14,514 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 15:21:14,515 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 104 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 15:21:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 15:21:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-18 15:21:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 15:21:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-03-18 15:21:14,520 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2022-03-18 15:21:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:21:14,520 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-03-18 15:21:14,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 15:21:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-03-18 15:21:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 15:21:14,521 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:21:14,521 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:21:14,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 15:21:14,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 15:21:14,752 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:21:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:21:14,753 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 1 times [2022-03-18 15:21:14,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:21:14,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133916441] [2022-03-18 15:21:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:14,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:21:14,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:21:14,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015410360] [2022-03-18 15:21:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:21:14,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:21:14,766 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) [2022-03-18 15:21:14,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 15:21:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:21:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 15:21:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:21:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 15:21:14,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 15:21:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 15:21:14,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:21:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133916441] [2022-03-18 15:21:14,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:21:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015410360] [2022-03-18 15:21:14,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015410360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 15:21:14,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 15:21:14,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 15:21:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468788832] [2022-03-18 15:21:14,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 15:21:14,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 15:21:14,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:21:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 15:21:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 15:21:14,974 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 15:21:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:21:15,040 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-18 15:21:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 15:21:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2022-03-18 15:21:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:21:15,042 INFO L225 Difference]: With dead ends: 69 [2022-03-18 15:21:15,042 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 15:21:15,043 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 15:21:15,048 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 15:21:15,050 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 144 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 15:21:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 15:21:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-03-18 15:21:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 15:21:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-03-18 15:21:15,068 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 42 [2022-03-18 15:21:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:21:15,068 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-03-18 15:21:15,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 15:21:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-03-18 15:21:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 15:21:15,069 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:21:15,069 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:21:15,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 15:21:15,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:21:15,271 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:21:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:21:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 1 times [2022-03-18 15:21:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:21:15,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101403950] [2022-03-18 15:21:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:15,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:21:15,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:21:15,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320196594] [2022-03-18 15:21:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:21:15,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:21:15,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:21:15,291 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) [2022-03-18 15:21:15,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process