/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/lcm1_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 17:45:24,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 17:45:24,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 17:45:24,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 17:45:24,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 17:45:24,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 17:45:24,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 17:45:24,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 17:45:24,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 17:45:24,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 17:45:24,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 17:45:24,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 17:45:24,831 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 17:45:24,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 17:45:24,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 17:45:24,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 17:45:24,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 17:45:24,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 17:45:24,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 17:45:24,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 17:45:24,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 17:45:24,860 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 17:45:24,871 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 17:45:24,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 17:45:24,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 17:45:24,873 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 17:45:24,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 17:45:24,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 17:45:24,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 17:45:24,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 17:45:24,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 17:45:24,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 17:45:24,874 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 17:45:24,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 17:45:24,875 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 17:45:24,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 17:45:24,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 17:45:24,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 17:45:24,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 17:45:24,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 17:45:24,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:45:24,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 17:45:24,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 17:45:24,876 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 17:45:24,876 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 17:45:24,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 17:45:24,876 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 17:45:24,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 17:45:25,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 17:45:25,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 17:45:25,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 17:45:25,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 17:45:25,151 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 17:45:25,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c [2022-04-06 17:45:25,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74ee0b707/1e900ac120774969b2faa222f70edcd5/FLAG4c5bf4df0 [2022-04-06 17:45:25,612 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 17:45:25,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c [2022-04-06 17:45:25,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74ee0b707/1e900ac120774969b2faa222f70edcd5/FLAG4c5bf4df0 [2022-04-06 17:45:25,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74ee0b707/1e900ac120774969b2faa222f70edcd5 [2022-04-06 17:45:25,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 17:45:25,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 17:45:25,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 17:45:25,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 17:45:25,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 17:45:25,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45bff017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25, skipping insertion in model container [2022-04-06 17:45:25,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 17:45:25,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 17:45:25,842 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/lcm1_valuebound5.c[552,565] [2022-04-06 17:45:25,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:45:25,887 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 17:45:25,901 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/lcm1_valuebound5.c[552,565] [2022-04-06 17:45:25,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:45:25,940 INFO L208 MainTranslator]: Completed translation [2022-04-06 17:45:25,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25 WrapperNode [2022-04-06 17:45:25,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 17:45:25,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 17:45:25,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 17:45:25,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 17:45:25,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 17:45:25,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 17:45:25,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 17:45:25,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 17:45:25,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (1/1) ... [2022-04-06 17:45:25,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:45:26,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:45:26,021 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 17:45:26,051 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 17:45:26,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 17:45:26,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 17:45:26,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 17:45:26,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 17:45:26,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 17:45:26,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 17:45:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 17:45:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 17:45:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 17:45:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 17:45:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 17:45:26,068 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 17:45:26,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 17:45:26,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 17:45:26,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 17:45:26,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 17:45:26,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 17:45:26,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 17:45:26,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 17:45:26,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 17:45:26,128 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 17:45:26,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 17:45:26,299 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 17:45:26,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 17:45:26,320 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 17:45:26,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:45:26 BoogieIcfgContainer [2022-04-06 17:45:26,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 17:45:26,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 17:45:26,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 17:45:26,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 17:45:26,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:45:25" (1/3) ... [2022-04-06 17:45:26,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c334d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:45:26, skipping insertion in model container [2022-04-06 17:45:26,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:45:25" (2/3) ... [2022-04-06 17:45:26,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c334d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:45:26, skipping insertion in model container [2022-04-06 17:45:26,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:45:26" (3/3) ... [2022-04-06 17:45:26,357 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound5.c [2022-04-06 17:45:26,361 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 17:45:26,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 17:45:26,407 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 17:45:26,416 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 17:45:26,416 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 17:45:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 17:45:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 17:45:26,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:45:26,442 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 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 17:45:26,443 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:45:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:45:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1520729432, now seen corresponding path program 1 times [2022-04-06 17:45:26,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:45:26,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1323816004] [2022-04-06 17:45:26,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:45:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1520729432, now seen corresponding path program 2 times [2022-04-06 17:45:26,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:45:26,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571627838] [2022-04-06 17:45:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:45:26,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:45:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:45:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:45:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 17:45:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 17:45:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 17:45:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 17:45:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 17:45:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:45:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 17:45:26,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:45:26,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571627838] [2022-04-06 17:45:26,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571627838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:45:26,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:45:26,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:45:26,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:45:26,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1323816004] [2022-04-06 17:45:26,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1323816004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:45:26,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:45:26,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:45:26,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409360232] [2022-04-06 17:45:26,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:45:26,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 17:45:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:45:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 17:45:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 17:45:26,784 INFO L87 Difference]: Start difference. First operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 17:45:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:45:26,902 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2022-04-06 17:45:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 17:45:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 17:45:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:45:26,911 INFO L225 Difference]: With dead ends: 73 [2022-04-06 17:45:26,911 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 17:45:26,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 17:45:26,916 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:45:26,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:45:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 17:45:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 17:45:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 17:45:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-06 17:45:26,970 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-06 17:45:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:45:26,970 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-06 17:45:26,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 17:45:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-06 17:45:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 17:45:26,974 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:45:26,974 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 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 17:45:26,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 17:45:26,976 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:45:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:45:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1122529479, now seen corresponding path program 1 times [2022-04-06 17:45:26,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:45:26,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1944841344] [2022-04-06 17:45:26,979 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:45:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1122529479, now seen corresponding path program 2 times [2022-04-06 17:45:26,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:45:26,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071496142] [2022-04-06 17:45:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:45:26,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:45:27,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:45:27,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654012440] [2022-04-06 17:45:27,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:45:27,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:45:27,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:45:27,023 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 17:45:27,043 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 17:45:27,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 17:45:27,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:45:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 17:45:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:45:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 17:45:27,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:45:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:45:27,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071496142] [2022-04-06 17:45:27,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:45:27,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654012440] [2022-04-06 17:45:27,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654012440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:45:27,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:45:27,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:45:27,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:45:27,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1944841344] [2022-04-06 17:45:27,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1944841344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:45:27,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:45:27,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:45:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725341167] [2022-04-06 17:45:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:45:27,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:45:27,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:45:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:45:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:45:27,322 INFO L87 Difference]: Start difference. First operand 35 states and 46 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 17:45:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:45:27,463 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-06 17:45:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:45:27,463 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-04-06 17:45:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:45:27,466 INFO L225 Difference]: With dead ends: 52 [2022-04-06 17:45:27,466 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 17:45:27,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 17:45:27,468 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:45:27,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:45:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 17:45:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-04-06 17:45:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 17:45:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-04-06 17:45:27,492 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 43 [2022-04-06 17:45:27,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:45:27,493 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-04-06 17:45:27,493 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 17:45:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-04-06 17:45:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 17:45:27,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:45:27,497 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:45:27,524 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 17:45:27,719 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 17:45:27,720 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:45:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:45:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 314996066, now seen corresponding path program 1 times [2022-04-06 17:45:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:45:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [320770421] [2022-04-06 17:45:27,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:45:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 314996066, now seen corresponding path program 2 times [2022-04-06 17:45:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:45:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095754250] [2022-04-06 17:45:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:45:27,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:45:27,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:45:27,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885512515] [2022-04-06 17:45:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:45:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:45:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:45:27,739 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 17:45:27,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process