/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:57:04,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:57:04,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:57:04,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:57:04,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 15:57:04,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 15:57:04,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 15:57:04,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 15:57:04,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 15:57:04,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 15:57:04,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 15:57:04,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 15:57:04,329 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 15:57:04,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 15:57:04,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 15:57:04,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 15:57:04,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 15:57:04,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 15:57:04,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:57:04,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:57:04,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:57:04,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:57:04,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:57:04,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:57:04,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:57:04,364 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:57:04,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:57:04,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:57:04,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:57:04,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:57:04,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:57:04,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:57:04,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:57:04,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:57:04,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:57:04,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:57:04,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:57:04,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:57:04,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:57:04,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:57:04,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:57:04,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:57:04,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:57:04,367 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:57:04,367 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:57:04,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:57:04,367 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:57:04,367 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:57:04,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:57:04,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:57:04,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:57:04,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:57:04,628 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:57:04,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound10.c [2022-03-20 15:57:04,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a22f16f/d2214f1f108e4a1ba7ed647ed037ec99/FLAG2e961ff08 [2022-03-20 15:57:05,079 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:57:05,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound10.c [2022-03-20 15:57:05,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a22f16f/d2214f1f108e4a1ba7ed647ed037ec99/FLAG2e961ff08 [2022-03-20 15:57:05,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a22f16f/d2214f1f108e4a1ba7ed647ed037ec99 [2022-03-20 15:57:05,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:57:05,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:57:05,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:57:05,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:57:05,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:57:05,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8760ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05, skipping insertion in model container [2022-03-20 15:57:05,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:57:05,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:57:05,341 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_unwindbound10.c[552,565] [2022-03-20 15:57:05,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:57:05,384 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:57:05,397 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_unwindbound10.c[552,565] [2022-03-20 15:57:05,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:57:05,429 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:57:05,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05 WrapperNode [2022-03-20 15:57:05,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:57:05,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:57:05,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:57:05,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:57:05,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:57:05,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:57:05,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:57:05,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:57:05,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (1/1) ... [2022-03-20 15:57:05,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:57:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:57:05,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 15:57:05,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 15:57:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:57:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:57:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:57:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:57:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:57:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:57:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:57:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:57:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:57:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:57:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 15:57:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:57:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:57:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:57:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:57:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:57:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:57:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:57:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:57:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:57:05,605 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:57:05,606 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:57:05,767 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:57:05,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:57:05,772 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 15:57:05,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:57:05 BoogieIcfgContainer [2022-03-20 15:57:05,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:57:05,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:57:05,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:57:05,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:57:05,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:57:05" (1/3) ... [2022-03-20 15:57:05,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebb9b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:57:05, skipping insertion in model container [2022-03-20 15:57:05,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:57:05" (2/3) ... [2022-03-20 15:57:05,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebb9b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:57:05, skipping insertion in model container [2022-03-20 15:57:05,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:57:05" (3/3) ... [2022-03-20 15:57:05,789 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound10.c [2022-03-20 15:57:05,793 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:57:05,793 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:57:05,825 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:57:05,831 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 15:57:05,831 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:57:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 15:57:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 15:57:05,849 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:57:05,849 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:57:05,849 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:57:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:57:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1515787587, now seen corresponding path program 1 times [2022-03-20 15:57:05,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:57:05,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765565057] [2022-03-20 15:57:05,869 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:57:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1515787587, now seen corresponding path program 2 times [2022-03-20 15:57:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:57:05,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703059674] [2022-03-20 15:57:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:57:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:57:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:57:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:57:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:57:06,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:57:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:57:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 15:57:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:57:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 15:57:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:57:06,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 15:57:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:57:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:57:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:57:06,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703059674] [2022-03-20 15:57:06,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703059674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:57:06,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:57:06,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:57:06,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:57:06,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765565057] [2022-03-20 15:57:06,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765565057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:57:06,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:57:06,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:57:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895848065] [2022-03-20 15:57:06,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:57:06,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 15:57:06,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:57:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 15:57:06,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:57:06,130 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:57:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:57:06,260 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2022-03-20 15:57:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 15:57:06,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 15:57:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:57:06,268 INFO L225 Difference]: With dead ends: 74 [2022-03-20 15:57:06,268 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 15:57:06,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:57:06,275 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:57:06,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:57:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 15:57:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 15:57:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:57:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-03-20 15:57:06,325 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2022-03-20 15:57:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:57:06,325 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-03-20 15:57:06,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:57:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-03-20 15:57:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 15:57:06,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:57:06,328 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:57:06,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 15:57:06,329 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:57:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:57:06,331 INFO L85 PathProgramCache]: Analyzing trace with hash 182383832, now seen corresponding path program 1 times [2022-03-20 15:57:06,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:57:06,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2029249791] [2022-03-20 15:57:06,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:57:06,333 INFO L85 PathProgramCache]: Analyzing trace with hash 182383832, now seen corresponding path program 2 times [2022-03-20 15:57:06,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:57:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808412337] [2022-03-20 15:57:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:57:06,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:57:06,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:57:06,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642624318] [2022-03-20 15:57:06,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:57:06,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:57:06,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:57:06,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:57:06,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 15:57:06,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:57:06,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:57:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 15:57:06,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:57:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:57:06,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:57:06,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:57:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808412337] [2022-03-20 15:57:06,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:57:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642624318] [2022-03-20 15:57:06,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642624318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:57:06,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:57:06,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:57:06,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:57:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2029249791] [2022-03-20 15:57:06,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2029249791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:57:06,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:57:06,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:57:06,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607122872] [2022-03-20 15:57:06,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:57:06,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:57:06,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:57:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:57:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:57:06,678 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:57:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:57:06,701 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-20 15:57:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:57:06,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 15:57:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:57:06,702 INFO L225 Difference]: With dead ends: 45 [2022-03-20 15:57:06,703 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 15:57:06,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:57:06,704 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:57:06,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:57:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 15:57:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 15:57:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:57:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-03-20 15:57:06,713 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 33 [2022-03-20 15:57:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:57:06,714 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-03-20 15:57:06,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:57:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-03-20 15:57:06,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 15:57:06,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:57:06,715 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:57:06,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 15:57:06,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:57:06,925 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:57:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:57:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash 184052128, now seen corresponding path program 1 times [2022-03-20 15:57:06,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:57:06,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [757160999] [2022-03-20 15:57:06,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:57:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash 184052128, now seen corresponding path program 2 times [2022-03-20 15:57:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:57:06,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841091964] [2022-03-20 15:57:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:57:06,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:57:06,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:57:06,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562510343] [2022-03-20 15:57:06,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:57:06,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:57:06,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:57:06,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:57:06,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 15:57:07,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:57:07,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:57:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:57:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:57:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:57:07,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:57:07,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:57:07,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841091964] [2022-03-20 15:57:07,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:57:07,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562510343] [2022-03-20 15:57:07,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562510343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:57:07,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:57:07,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:57:07,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:57:07,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [757160999] [2022-03-20 15:57:07,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [757160999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:57:07,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:57:07,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:57:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611242924] [2022-03-20 15:57:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:57:07,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:57:07,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:57:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:57:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:57:07,128 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:57:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:57:07,194 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-03-20 15:57:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:57:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-20 15:57:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:57:07,195 INFO L225 Difference]: With dead ends: 57 [2022-03-20 15:57:07,196 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 15:57:07,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:57:07,197 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:57:07,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 152 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:57:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 15:57:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-03-20 15:57:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:57:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-03-20 15:57:07,207 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 33 [2022-03-20 15:57:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:57:07,208 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-03-20 15:57:07,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:57:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-03-20 15:57:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 15:57:07,209 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:57:07,209 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-20 15:57:07,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 15:57:07,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 15:57:07,416 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:57:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:57:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 758334593, now seen corresponding path program 1 times [2022-03-20 15:57:07,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:57:07,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910455959] [2022-03-20 15:57:07,417 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:57:07,417 INFO L85 PathProgramCache]: Analyzing trace with hash 758334593, now seen corresponding path program 2 times [2022-03-20 15:57:07,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:57:07,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188154262] [2022-03-20 15:57:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:57:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:57:07,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:57:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132145144] [2022-03-20 15:57:07,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:57:07,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:57:07,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:57:07,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:57:07,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process