/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 16:12:00,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 16:12:00,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 16:12:00,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 16:12:00,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 16:12:00,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 16:12:00,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 16:12:00,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 16:12:00,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 16:12:00,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 16:12:00,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 16:12:00,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 16:12:00,997 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 16:12:00,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 16:12:01,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 16:12:01,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 16:12:01,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 16:12:01,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 16:12:01,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 16:12:01,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 16:12:01,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 16:12:01,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 16:12:01,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 16:12:01,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 16:12:01,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 16:12:01,029 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 16:12:01,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 16:12:01,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 16:12:01,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 16:12:01,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 16:12:01,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 16:12:01,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 16:12:01,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 16:12:01,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:12:01,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 16:12:01,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 16:12:01,031 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 16:12:01,031 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 16:12:01,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 16:12:01,031 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 16:12:01,031 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 16:12:01,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 16:12:01,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 16:12:01,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 16:12:01,238 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 16:12:01,238 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 16:12:01,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound100.c [2022-03-20 16:12:01,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c321c927d/eb62e726994a45f7acd45acbd566179c/FLAG5c09253eb [2022-03-20 16:12:01,635 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 16:12:01,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound100.c [2022-03-20 16:12:01,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c321c927d/eb62e726994a45f7acd45acbd566179c/FLAG5c09253eb [2022-03-20 16:12:01,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c321c927d/eb62e726994a45f7acd45acbd566179c [2022-03-20 16:12:01,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 16:12:01,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 16:12:01,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 16:12:01,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 16:12:01,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 16:12:01,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60bd9090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01, skipping insertion in model container [2022-03-20 16:12:01,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 16:12:01,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 16:12:01,835 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_unwindbound100.c[537,550] [2022-03-20 16:12:01,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:12:01,859 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 16:12:01,871 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_unwindbound100.c[537,550] [2022-03-20 16:12:01,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:12:01,893 INFO L208 MainTranslator]: Completed translation [2022-03-20 16:12:01,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01 WrapperNode [2022-03-20 16:12:01,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 16:12:01,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 16:12:01,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 16:12:01,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 16:12:01,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 16:12:01,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 16:12:01,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 16:12:01,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 16:12:01,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (1/1) ... [2022-03-20 16:12:01,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:12:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:12:01,950 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) [2022-03-20 16:12:01,979 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 [2022-03-20 16:12:01,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 16:12:01,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 16:12:01,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 16:12:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 16:12:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 16:12:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 16:12:01,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 16:12:01,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 16:12:01,985 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 16:12:01,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 16:12:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 16:12:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 16:12:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 16:12:02,035 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 16:12:02,036 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 16:12:02,118 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 16:12:02,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 16:12:02,122 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 16:12:02,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:12:02 BoogieIcfgContainer [2022-03-20 16:12:02,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 16:12:02,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 16:12:02,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 16:12:02,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 16:12:02,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:12:01" (1/3) ... [2022-03-20 16:12:02,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1ead45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:12:02, skipping insertion in model container [2022-03-20 16:12:02,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:12:01" (2/3) ... [2022-03-20 16:12:02,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1ead45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:12:02, skipping insertion in model container [2022-03-20 16:12:02,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:12:02" (3/3) ... [2022-03-20 16:12:02,128 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound100.c [2022-03-20 16:12:02,131 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 16:12:02,131 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 16:12:02,157 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 16:12:02,161 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 16:12:02,161 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 16:12:02,171 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) [2022-03-20 16:12:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 16:12:02,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:12:02,177 INFO L499 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] [2022-03-20 16:12:02,178 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:12:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:12:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2022-03-20 16:12:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:02,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356950945] [2022-03-20 16:12:02,219 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:12:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 2 times [2022-03-20 16:12:02,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:12:02,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631148648] [2022-03-20 16:12:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:12:02,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:12:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:12:02,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 16:12:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:12:02,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 16:12:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:12:02,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 16:12:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:12:02,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 16:12:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:12:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 16:12:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:12:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 16:12:02,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:12:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631148648] [2022-03-20 16:12:02,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631148648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:12:02,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:12:02,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:12:02,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:12:02,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356950945] [2022-03-20 16:12:02,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356950945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:12:02,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:12:02,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:12:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929787655] [2022-03-20 16:12:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:12:02,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 16:12:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 16:12:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 16:12:02,486 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) [2022-03-20 16:12:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:12:02,572 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2022-03-20 16:12:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 16:12:02,574 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 [2022-03-20 16:12:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:12:02,585 INFO L225 Difference]: With dead ends: 58 [2022-03-20 16:12:02,585 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 16:12:02,587 INFO L912 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 [2022-03-20 16:12:02,590 INFO L913 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 [2022-03-20 16:12:02,592 INFO L914 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] [2022-03-20 16:12:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 16:12:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 16:12:02,619 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) [2022-03-20 16:12:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-03-20 16:12:02,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2022-03-20 16:12:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:12:02,622 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-03-20 16:12:02,623 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) [2022-03-20 16:12:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-03-20 16:12:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 16:12:02,625 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:12:02,625 INFO L499 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] [2022-03-20 16:12:02,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 16:12:02,626 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:12:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:12:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2022-03-20 16:12:02,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:02,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409349188] [2022-03-20 16:12:02,635 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:12:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 2 times [2022-03-20 16:12:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:12:02,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691519266] [2022-03-20 16:12:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:12:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:12:02,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:12:02,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365266987] [2022-03-20 16:12:02,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:12:02,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:12:02,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:12:02,666 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) [2022-03-20 16:12:02,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 16:12:02,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 16:12:02,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:12:02,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 16:12:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:12:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 16:12:02,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:12:02,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:12:02,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691519266] [2022-03-20 16:12:02,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:12:02,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365266987] [2022-03-20 16:12:02,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365266987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:12:02,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:12:02,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 16:12:02,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:12:02,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409349188] [2022-03-20 16:12:02,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409349188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:12:02,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:12:02,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 16:12:02,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127621116] [2022-03-20 16:12:02,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:12:02,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 16:12:02,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 16:12:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 16:12:02,831 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) [2022-03-20 16:12:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:12:02,841 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-03-20 16:12:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 16:12:02,841 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 [2022-03-20 16:12:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:12:02,851 INFO L225 Difference]: With dead ends: 36 [2022-03-20 16:12:02,851 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 16:12:02,851 INFO L912 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 [2022-03-20 16:12:02,852 INFO L913 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 [2022-03-20 16:12:02,853 INFO L914 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] [2022-03-20 16:12:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 16:12:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 16:12:02,858 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) [2022-03-20 16:12:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-03-20 16:12:02,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2022-03-20 16:12:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:12:02,859 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-03-20 16:12:02,860 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) [2022-03-20 16:12:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-03-20 16:12:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 16:12:02,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:12:02,860 INFO L499 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] [2022-03-20 16:12:02,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 16:12:03,071 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 [2022-03-20 16:12:03,072 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:12:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:12:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 1 times [2022-03-20 16:12:03,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:03,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1080542819] [2022-03-20 16:12:03,073 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:12:03,073 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 2 times [2022-03-20 16:12:03,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:12:03,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052678619] [2022-03-20 16:12:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:12:03,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:12:03,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:12:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273839762] [2022-03-20 16:12:03,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:12:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:12:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:12:03,115 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) [2022-03-20 16:12:03,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 16:12:03,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 16:12:03,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:12:03,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 16:12:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:12:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 16:12:03,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:12:03,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:12:03,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052678619] [2022-03-20 16:12:03,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:12:03,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273839762] [2022-03-20 16:12:03,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273839762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:12:03,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:12:03,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:12:03,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:12:03,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1080542819] [2022-03-20 16:12:03,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1080542819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:12:03,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:12:03,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:12:03,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068760343] [2022-03-20 16:12:03,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:12:03,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:12:03,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:12:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 16:12:03,390 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) [2022-03-20 16:12:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:12:03,444 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-03-20 16:12:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 16:12:03,445 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 [2022-03-20 16:12:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:12:03,446 INFO L225 Difference]: With dead ends: 39 [2022-03-20 16:12:03,446 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 16:12:03,447 INFO L912 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 [2022-03-20 16:12:03,448 INFO L913 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 [2022-03-20 16:12:03,448 INFO L914 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] [2022-03-20 16:12:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 16:12:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 16:12:03,453 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) [2022-03-20 16:12:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-03-20 16:12:03,454 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2022-03-20 16:12:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:12:03,454 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-03-20 16:12:03,454 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) [2022-03-20 16:12:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-03-20 16:12:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 16:12:03,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:12:03,455 INFO L499 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] [2022-03-20 16:12:03,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 16:12:03,655 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 [2022-03-20 16:12:03,656 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:12:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:12:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 1 times [2022-03-20 16:12:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:03,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1974579738] [2022-03-20 16:12:03,657 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:12:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 2 times [2022-03-20 16:12:03,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:12:03,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425135563] [2022-03-20 16:12:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:12:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:12:03,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:12:03,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172546548] [2022-03-20 16:12:03,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:12:03,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:12:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:12:03,675 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) [2022-03-20 16:12:03,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 16:12:03,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:12:03,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:12:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 16:12:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:12:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 16:12:03,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:12:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 16:12:03,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:12:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425135563] [2022-03-20 16:12:03,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:12:03,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172546548] [2022-03-20 16:12:03,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172546548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 16:12:03,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 16:12:03,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 16:12:03,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:12:03,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1974579738] [2022-03-20 16:12:03,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1974579738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:12:03,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:12:03,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:12:03,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136564176] [2022-03-20 16:12:03,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:12:03,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:12:03,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:12:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 16:12:03,889 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 16:12:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:12:03,920 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-20 16:12:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 16:12:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 16:12:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:12:03,921 INFO L225 Difference]: With dead ends: 45 [2022-03-20 16:12:03,921 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 16:12:03,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 16:12:03,922 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:12:03,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 83 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:12:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 16:12:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 16:12:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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) [2022-03-20 16:12:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-03-20 16:12:03,931 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 42 [2022-03-20 16:12:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:12:03,932 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-03-20 16:12:03,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 16:12:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-03-20 16:12:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 16:12:03,933 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:12:03,933 INFO L499 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] [2022-03-20 16:12:03,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 16:12:04,133 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 [2022-03-20 16:12:04,134 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:12:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:12:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 1 times [2022-03-20 16:12:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:12:04,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292103190] [2022-03-20 16:12:04,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:12:04,135 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 2 times [2022-03-20 16:12:04,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:12:04,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606703531] [2022-03-20 16:12:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:12:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:12:04,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:12:04,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185141579] [2022-03-20 16:12:04,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:12:04,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:12:04,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:12:04,148 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) [2022-03-20 16:12:04,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process