/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-34549b5 [2022-04-06 17:47:28,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 17:47:28,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 17:47:28,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 17:47:28,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 17:47:28,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 17:47:28,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 17:47:28,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 17:47:28,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 17:47:28,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 17:47:28,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 17:47:28,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 17:47:28,625 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 17:47:28,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 17:47:28,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 17:47:28,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 17:47:28,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 17:47:28,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 17:47:28,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 17:47:28,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 17:47:28,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 17:47:28,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 17:47:28,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 17:47:28,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 17:47:28,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 17:47:28,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 17:47:28,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:47:28,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 17:47:28,644 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 17:47:28,645 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 17:47:28,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 17:47:28,645 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 17:47:28,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 17:47:28,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 17:47:28,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 17:47:28,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 17:47:28,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 17:47:28,822 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 17:47:28,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound100.c [2022-04-06 17:47:28,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c404c22c/3296d3285bfc46e2a7dd7be8ec5bd218/FLAG215862eea [2022-04-06 17:47:29,184 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 17:47:29,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound100.c [2022-04-06 17:47:29,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c404c22c/3296d3285bfc46e2a7dd7be8ec5bd218/FLAG215862eea [2022-04-06 17:47:29,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c404c22c/3296d3285bfc46e2a7dd7be8ec5bd218 [2022-04-06 17:47:29,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 17:47:29,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 17:47:29,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 17:47:29,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 17:47:29,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 17:47:29,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e4ac47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29, skipping insertion in model container [2022-04-06 17:47:29,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 17:47:29,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 17:47:29,729 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] [2022-04-06 17:47:29,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:47:29,743 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 17:47:29,750 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] [2022-04-06 17:47:29,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:47:29,761 INFO L208 MainTranslator]: Completed translation [2022-04-06 17:47:29,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29 WrapperNode [2022-04-06 17:47:29,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 17:47:29,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 17:47:29,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 17:47:29,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 17:47:29,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 17:47:29,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 17:47:29,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 17:47:29,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 17:47:29,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (1/1) ... [2022-04-06 17:47:29,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:47:29,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:47:29,806 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) [2022-04-06 17:47:29,807 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 [2022-04-06 17:47:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 17:47:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 17:47:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 17:47:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 17:47:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 17:47:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 17:47:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 17:47:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 17:47:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 17:47:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 17:47:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 17:47:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 17:47:29,880 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 17:47:29,881 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 17:47:30,013 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 17:47:30,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 17:47:30,018 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 17:47:30,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:47:30 BoogieIcfgContainer [2022-04-06 17:47:30,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 17:47:30,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 17:47:30,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 17:47:30,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 17:47:30,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:47:29" (1/3) ... [2022-04-06 17:47:30,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7c09ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:47:30, skipping insertion in model container [2022-04-06 17:47:30,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:47:29" (2/3) ... [2022-04-06 17:47:30,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7c09ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:47:30, skipping insertion in model container [2022-04-06 17:47:30,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:47:30" (3/3) ... [2022-04-06 17:47:30,029 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound100.c [2022-04-06 17:47:30,032 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 17:47:30,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 17:47:30,085 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 17:47:30,089 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 [2022-04-06 17:47:30,094 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 17:47:30,107 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) [2022-04-06 17:47:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 17:47:30,122 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:47:30,123 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] [2022-04-06 17:47:30,124 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:47:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:47:30,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2022-04-06 17:47:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:30,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010313535] [2022-04-06 17:47:30,146 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:47:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 2 times [2022-04-06 17:47:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:47:30,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085868587] [2022-04-06 17:47:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:47:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:47:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:47:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:47:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:47:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:47:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:47:30,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 17:47:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:47:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 17:47:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:47:30,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 17:47:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:47:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 17:47:30,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:47:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085868587] [2022-04-06 17:47:30,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085868587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:47:30,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:47:30,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:47:30,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:47:30,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010313535] [2022-04-06 17:47:30,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010313535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:47:30,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:47:30,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:47:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716092615] [2022-04-06 17:47:30,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:47:30,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 17:47:30,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:30,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 17:47:30,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 17:47:30,389 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) [2022-04-06 17:47:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:47:30,465 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2022-04-06 17:47:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 17:47:30,467 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 [2022-04-06 17:47:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:47:30,472 INFO L225 Difference]: With dead ends: 58 [2022-04-06 17:47:30,472 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 17:47:30,474 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 [2022-04-06 17:47:30,478 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:47:30,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:47:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 17:47:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 17:47:30,509 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) [2022-04-06 17:47:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-06 17:47:30,511 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2022-04-06 17:47:30,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:47:30,511 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-06 17:47:30,511 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) [2022-04-06 17:47:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-06 17:47:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 17:47:30,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:47:30,513 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] [2022-04-06 17:47:30,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 17:47:30,514 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:47:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:47:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2022-04-06 17:47:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978245600] [2022-04-06 17:47:30,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:47:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 2 times [2022-04-06 17:47:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:47:30,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691515971] [2022-04-06 17:47:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:47:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:47:30,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:47:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648663203] [2022-04-06 17:47:30,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:47:30,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:47:30,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:47:30,559 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) [2022-04-06 17:47:30,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 17:47:30,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 17:47:30,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:47:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 17:47:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:47:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 17:47:30,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:47:30,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:47:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691515971] [2022-04-06 17:47:30,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:47:30,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648663203] [2022-04-06 17:47:30,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648663203] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:47:30,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:47:30,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 17:47:30,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:47:30,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978245600] [2022-04-06 17:47:30,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978245600] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:47:30,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:47:30,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 17:47:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128137369] [2022-04-06 17:47:30,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:47:30,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 17:47:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 17:47:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 17:47:30,715 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) [2022-04-06 17:47:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:47:30,724 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-04-06 17:47:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 17:47:30,725 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 [2022-04-06 17:47:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:47:30,726 INFO L225 Difference]: With dead ends: 36 [2022-04-06 17:47:30,726 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 17:47:30,726 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 [2022-04-06 17:47:30,727 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 [2022-04-06 17:47:30,727 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] [2022-04-06 17:47:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 17:47:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 17:47:30,732 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) [2022-04-06 17:47:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-06 17:47:30,733 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2022-04-06 17:47:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:47:30,734 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-06 17:47:30,734 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) [2022-04-06 17:47:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-06 17:47:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 17:47:30,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:47:30,735 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] [2022-04-06 17:47:30,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 17:47:30,951 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 [2022-04-06 17:47:30,952 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:47:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:47:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 1 times [2022-04-06 17:47:30,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:30,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870327044] [2022-04-06 17:47:30,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:47:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 2 times [2022-04-06 17:47:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:47:30,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477686979] [2022-04-06 17:47:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:47:30,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:47:30,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:47:30,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41710475] [2022-04-06 17:47:30,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:47:30,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:47:30,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:47:30,977 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) [2022-04-06 17:47:30,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 17:47:31,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 17:47:31,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:47:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 17:47:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:47:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 17:47:31,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:47:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:47:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477686979] [2022-04-06 17:47:31,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:47:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41710475] [2022-04-06 17:47:31,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41710475] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:47:31,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:47:31,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:47:31,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:47:31,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870327044] [2022-04-06 17:47:31,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870327044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:47:31,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:47:31,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:47:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586792757] [2022-04-06 17:47:31,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:47:31,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:47:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:47:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:47:31,243 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) [2022-04-06 17:47:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:47:31,294 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-04-06 17:47:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:47:31,294 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 [2022-04-06 17:47:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:47:31,295 INFO L225 Difference]: With dead ends: 39 [2022-04-06 17:47:31,295 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 17:47:31,296 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 [2022-04-06 17:47:31,297 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:47:31,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:47:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 17:47:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 17:47:31,304 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) [2022-04-06 17:47:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-04-06 17:47:31,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2022-04-06 17:47:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:47:31,305 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-04-06 17:47:31,305 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) [2022-04-06 17:47:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-06 17:47:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 17:47:31,306 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:47:31,306 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] [2022-04-06 17:47:31,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 17:47:31,510 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 [2022-04-06 17:47:31,511 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:47:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:47:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 1 times [2022-04-06 17:47:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:31,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871252424] [2022-04-06 17:47:31,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:47:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 2 times [2022-04-06 17:47:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:47:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620205990] [2022-04-06 17:47:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:47:31,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:47:31,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:47:31,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611811915] [2022-04-06 17:47:31,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:47:31,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:47:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:47:31,526 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) [2022-04-06 17:47:31,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 17:47:31,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:47:31,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:47:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 17:47:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:47:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 17:47:31,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:47:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 17:47:31,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:47:31,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620205990] [2022-04-06 17:47:31,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:47:31,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611811915] [2022-04-06 17:47:31,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611811915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:47:31,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:47:31,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 17:47:31,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:47:31,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871252424] [2022-04-06 17:47:31,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871252424] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:47:31,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:47:31,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:47:31,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634743926] [2022-04-06 17:47:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:47:31,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:47:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:47:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:47:31,837 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) [2022-04-06 17:47:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:47:31,880 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-04-06 17:47:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 17:47:31,881 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 [2022-04-06 17:47:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:47:31,882 INFO L225 Difference]: With dead ends: 45 [2022-04-06 17:47:31,882 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 17:47:31,882 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 [2022-04-06 17:47:31,883 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 [2022-04-06 17:47:31,883 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] [2022-04-06 17:47:31,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 17:47:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 17:47:31,887 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) [2022-04-06 17:47:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-04-06 17:47:31,888 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 42 [2022-04-06 17:47:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:47:31,888 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-04-06 17:47:31,889 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) [2022-04-06 17:47:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-04-06 17:47:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 17:47:31,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:47:31,889 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] [2022-04-06 17:47:31,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 17:47:32,090 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 [2022-04-06 17:47:32,090 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:47:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:47:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 1 times [2022-04-06 17:47:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:47:32,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1643256079] [2022-04-06 17:47:32,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:47:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 2 times [2022-04-06 17:47:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:47:32,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311665033] [2022-04-06 17:47:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:47:32,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:47:32,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:47:32,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749507160] [2022-04-06 17:47:32,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:47:32,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:47:32,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:47:32,106 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) [2022-04-06 17:47:32,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process