/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/fermat2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:19:12,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:19:12,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:19:12,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:19:12,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 15:19:12,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 15:19:12,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 15:19:12,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 15:19:12,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 15:19:12,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 15:19:12,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 15:19:12,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 15:19:12,634 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 15:19:12,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 15:19:12,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 15:19:12,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 15:19:12,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 15:19:12,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 15:19:12,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:19:12,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:19:12,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:19:12,650 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 15:19:12,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:19:12,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:19:12,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:19:12,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:19:12,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:19:12,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:19:12,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:19:12,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:19:12,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:19:12,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:19:12,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:19:12,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:19:12,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:19:12,663 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:19:12,663 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:19:12,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:19:12,663 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:19:12,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:19:12,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:19:12,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:19:12,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:19:12,851 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:19:12,855 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:19:12,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2022-03-20 15:19:12,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e78c2c8/dcc005d7768343b2b8bb998e37f6bb64/FLAG7dfb99b66 [2022-03-20 15:19:13,240 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:19:13,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2022-03-20 15:19:13,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e78c2c8/dcc005d7768343b2b8bb998e37f6bb64/FLAG7dfb99b66 [2022-03-20 15:19:13,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e78c2c8/dcc005d7768343b2b8bb998e37f6bb64 [2022-03-20 15:19:13,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:19:13,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:19:13,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:19:13,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:19:13,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:19:13,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e904af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13, skipping insertion in model container [2022-03-20 15:19:13,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:19:13,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:19:13,391 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/fermat2-ll_unwindbound20.c[524,537] [2022-03-20 15:19:13,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:19:13,426 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:19:13,432 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/fermat2-ll_unwindbound20.c[524,537] [2022-03-20 15:19:13,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:19:13,456 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:19:13,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13 WrapperNode [2022-03-20 15:19:13,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:19:13,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:19:13,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:19:13,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:19:13,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:19:13,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:19:13,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:19:13,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:19:13,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (1/1) ... [2022-03-20 15:19:13,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:19:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:13,510 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 15:19:13,514 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 15:19:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:19:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:19:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:19:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:19:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:19:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:19:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:19:13,587 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:19:13,589 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:19:13,715 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:19:13,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:19:13,719 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 15:19:13,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:19:13 BoogieIcfgContainer [2022-03-20 15:19:13,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:19:13,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:19:13,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:19:13,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:19:13,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:19:13" (1/3) ... [2022-03-20 15:19:13,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2513227c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:19:13, skipping insertion in model container [2022-03-20 15:19:13,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:13" (2/3) ... [2022-03-20 15:19:13,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2513227c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:19:13, skipping insertion in model container [2022-03-20 15:19:13,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:19:13" (3/3) ... [2022-03-20 15:19:13,725 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound20.c [2022-03-20 15:19:13,728 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:19:13,728 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:19:13,753 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:19:13,757 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 15:19:13,758 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:19:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 15:19:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 15:19:13,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:13,771 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:13,772 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-20 15:19:13,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:13,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437210983] [2022-03-20 15:19:13,798 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-03-20 15:19:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:13,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022007714] [2022-03-20 15:19:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:13,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:13,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:13,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625872984] [2022-03-20 15:19:13,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:13,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:13,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:13,874 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 15:19:13,875 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 15:19:13,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:19:13,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:13,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 15:19:13,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 15:19:13,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:19:13,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:13,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022007714] [2022-03-20 15:19:13,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:13,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625872984] [2022-03-20 15:19:14,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625872984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:14,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:14,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 15:19:14,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:14,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437210983] [2022-03-20 15:19:14,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437210983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:14,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:14,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 15:19:14,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695936182] [2022-03-20 15:19:14,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:14,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 15:19:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 15:19:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 15:19:14,031 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:19:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:14,052 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 15:19:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 15:19:14,054 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 15:19:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:14,059 INFO L225 Difference]: With dead ends: 53 [2022-03-20 15:19:14,060 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 15:19:14,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 15:19:14,066 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:14,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 15:19:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 15:19:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 15:19:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-20 15:19:14,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-20 15:19:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:14,104 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-20 15:19:14,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:19:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-20 15:19:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 15:19:14,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:14,106 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:14,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 15:19:14,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 15:19:14,320 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-20 15:19:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:14,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [457318762] [2022-03-20 15:19:14,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-03-20 15:19:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364320023] [2022-03-20 15:19:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:14,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:14,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:14,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415393552] [2022-03-20 15:19:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:14,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:14,359 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 15:19:14,370 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 15:19:14,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:19:14,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:14,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 15:19:14,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:14,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:19:14,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:14,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364320023] [2022-03-20 15:19:14,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:14,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415393552] [2022-03-20 15:19:14,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415393552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:14,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:14,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:19:14,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:14,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [457318762] [2022-03-20 15:19:14,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [457318762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:14,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:14,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:19:14,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650983452] [2022-03-20 15:19:14,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:14,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:19:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:19:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:19:14,487 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:19:14,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:14,497 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 15:19:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:19:14,498 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 15:19:14,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:14,498 INFO L225 Difference]: With dead ends: 34 [2022-03-20 15:19:14,498 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 15:19:14,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 15:19:14,499 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:14,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 15:19:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 15:19:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 15:19:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 15:19:14,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-20 15:19:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:14,506 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 15:19:14,506 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:19:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 15:19:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 15:19:14,506 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:14,507 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:14,526 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 15:19:14,713 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,SelfDestructingSolverStorable1 [2022-03-20 15:19:14,714 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-20 15:19:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:14,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613893705] [2022-03-20 15:19:14,715 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-03-20 15:19:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:14,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629734997] [2022-03-20 15:19:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:14,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:14,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211893200] [2022-03-20 15:19:14,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:14,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:14,742 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 15:19:14,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 15:19:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:19:14,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:19:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:15,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:19:15,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:15,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629734997] [2022-03-20 15:19:15,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:15,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211893200] [2022-03-20 15:19:15,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211893200] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:15,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:15,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:19:15,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:15,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613893705] [2022-03-20 15:19:15,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613893705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:15,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:15,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:19:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100732995] [2022-03-20 15:19:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:15,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:19:15,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:19:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:19:15,550 INFO L87 Difference]: Start difference. First operand 27 states and 31 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:19:17,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:19:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:17,205 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-03-20 15:19:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:19:17,205 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 15:19:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:17,206 INFO L225 Difference]: With dead ends: 39 [2022-03-20 15:19:17,206 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 15:19:17,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 15:19:17,207 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:17,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 91 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 15:19:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 15:19:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 15:19:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 15:19:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-20 15:19:17,214 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2022-03-20 15:19:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:17,215 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-20 15:19:17,215 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:19:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-20 15:19:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 15:19:17,219 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:17,219 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:17,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:17,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:17,435 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-20 15:19:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194466913] [2022-03-20 15:19:17,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-03-20 15:19:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:17,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811084301] [2022-03-20 15:19:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:17,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:17,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:17,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818883226] [2022-03-20 15:19:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:17,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:17,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:17,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 15:19:17,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:17,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 15:19:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:17,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:17,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:17,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811084301] [2022-03-20 15:19:17,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:17,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818883226] [2022-03-20 15:19:17,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818883226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:17,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:17,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 15:19:17,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:17,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194466913] [2022-03-20 15:19:17,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194466913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:17,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:17,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:19:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658056416] [2022-03-20 15:19:17,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:17,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:19:17,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:19:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:19:17,672 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:19:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:17,728 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-03-20 15:19:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:19:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-20 15:19:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:17,729 INFO L225 Difference]: With dead ends: 43 [2022-03-20 15:19:17,729 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 15:19:17,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:19:17,730 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:17,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 15:19:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-03-20 15:19:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 15:19:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-20 15:19:17,736 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-20 15:19:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:17,736 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-20 15:19:17,736 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:19:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-20 15:19:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 15:19:17,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:17,737 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:17,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:17,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:17,952 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-20 15:19:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:17,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709002600] [2022-03-20 15:19:17,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-03-20 15:19:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:17,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630973007] [2022-03-20 15:19:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:17,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:17,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762301992] [2022-03-20 15:19:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:17,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:17,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:17,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:17,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 15:19:18,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:19:18,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:18,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:18,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630973007] [2022-03-20 15:19:18,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762301992] [2022-03-20 15:19:18,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762301992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:18,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:18,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 15:19:18,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709002600] [2022-03-20 15:19:18,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709002600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:18,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:18,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:19:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860614182] [2022-03-20 15:19:18,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:18,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:19:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:18,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:19:18,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:19:18,173 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 15:19:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:18,197 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-20 15:19:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:19:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-20 15:19:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:18,198 INFO L225 Difference]: With dead ends: 43 [2022-03-20 15:19:18,198 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 15:19:18,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:19:18,211 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:18,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 15:19:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 15:19:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 15:19:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-20 15:19:18,218 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-03-20 15:19:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:18,219 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-20 15:19:18,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 15:19:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-20 15:19:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 15:19:18,219 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:18,219 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:18,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:18,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:18,420 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-03-20 15:19:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:18,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [457601472] [2022-03-20 15:19:18,421 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-03-20 15:19:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:18,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943730956] [2022-03-20 15:19:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:18,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:18,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:18,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288989714] [2022-03-20 15:19:18,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:18,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:18,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:18,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 15:19:18,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:18,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:19:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:18,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 15:19:18,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943730956] [2022-03-20 15:19:18,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288989714] [2022-03-20 15:19:18,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288989714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:18,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:18,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 15:19:18,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:18,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [457601472] [2022-03-20 15:19:18,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [457601472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:18,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:18,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:19:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500040843] [2022-03-20 15:19:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:18,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:19:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:19:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:19:18,658 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:19:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:18,703 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-20 15:19:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:19:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-20 15:19:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:18,704 INFO L225 Difference]: With dead ends: 52 [2022-03-20 15:19:18,704 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 15:19:18,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:19:18,705 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:18,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 15:19:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 15:19:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 15:19:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-20 15:19:18,715 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-03-20 15:19:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:18,715 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-20 15:19:18,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:19:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-20 15:19:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 15:19:18,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:18,716 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:18,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:18,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:18,943 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:18,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:18,944 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-03-20 15:19:18,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:18,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2088662122] [2022-03-20 15:19:18,944 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:18,944 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-03-20 15:19:18,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:18,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249207611] [2022-03-20 15:19:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:18,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:18,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671552808] [2022-03-20 15:19:18,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:18,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:18,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:18,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:18,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 15:19:18,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 15:19:18,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:19:19,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:19,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 15:19:19,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249207611] [2022-03-20 15:19:19,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671552808] [2022-03-20 15:19:19,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671552808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:19,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:19,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 15:19:19,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2088662122] [2022-03-20 15:19:19,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2088662122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:19,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:19,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:19:19,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809336189] [2022-03-20 15:19:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:19,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:19:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:19:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:19:19,193 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:19:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:19,236 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-20 15:19:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:19:19,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-20 15:19:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:19,237 INFO L225 Difference]: With dead ends: 61 [2022-03-20 15:19:19,237 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 15:19:19,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:19:19,238 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:19,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 15:19:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 15:19:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 15:19:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-20 15:19:19,247 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-03-20 15:19:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:19,247 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-20 15:19:19,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:19:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-20 15:19:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 15:19:19,248 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:19,248 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:19,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:19,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:19,465 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-03-20 15:19:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:19,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1301419855] [2022-03-20 15:19:19,466 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:19,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-03-20 15:19:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:19,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978290189] [2022-03-20 15:19:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:19,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:19,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732357563] [2022-03-20 15:19:19,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:19,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:19,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 15:19:19,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:19,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:19,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:19:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:19,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:19:19,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978290189] [2022-03-20 15:19:19,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732357563] [2022-03-20 15:19:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732357563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:19,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:19,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:19:19,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1301419855] [2022-03-20 15:19:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1301419855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:19,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:19,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:19:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361128383] [2022-03-20 15:19:19,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:19,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:19:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:19:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:19:19,753 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:19:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:19,808 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-20 15:19:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:19:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-20 15:19:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:19,809 INFO L225 Difference]: With dead ends: 70 [2022-03-20 15:19:19,809 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 15:19:19,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:19:19,810 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:19,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 15:19:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 15:19:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 15:19:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-03-20 15:19:19,821 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-03-20 15:19:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:19,821 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-03-20 15:19:19,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:19:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-03-20 15:19:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 15:19:19,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:19,822 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:19,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:20,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-20 15:19:20,039 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-03-20 15:19:20,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998735265] [2022-03-20 15:19:20,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-03-20 15:19:20,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:20,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130500139] [2022-03-20 15:19:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:20,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158562121] [2022-03-20 15:19:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:20,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:20,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:20,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 15:19:20,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:20,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:20,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:19:20,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:20,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 15:19:20,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130500139] [2022-03-20 15:19:20,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158562121] [2022-03-20 15:19:20,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158562121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:20,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:20,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 15:19:20,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998735265] [2022-03-20 15:19:20,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998735265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:20,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:20,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:19:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079971058] [2022-03-20 15:19:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:20,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:19:20,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:20,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:19:20,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:19:20,488 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:19:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:20,548 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-20 15:19:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:19:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-20 15:19:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:20,549 INFO L225 Difference]: With dead ends: 79 [2022-03-20 15:19:20,549 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 15:19:20,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:19:20,549 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:20,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 15:19:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 15:19:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:19:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-03-20 15:19:20,560 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-03-20 15:19:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:20,560 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-03-20 15:19:20,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:19:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-03-20 15:19:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 15:19:20,561 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:20,561 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:20,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:20,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:20,778 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:20,778 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-03-20 15:19:20,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:20,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [882565232] [2022-03-20 15:19:20,779 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-03-20 15:19:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:20,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021452568] [2022-03-20 15:19:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:20,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:20,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040623279] [2022-03-20 15:19:20,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:20,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:20,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:20,816 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:20,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:19:20,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:19:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:20,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:19:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:21,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 15:19:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:21,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021452568] [2022-03-20 15:19:21,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:21,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040623279] [2022-03-20 15:19:21,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040623279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:21,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:21,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 15:19:21,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:21,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [882565232] [2022-03-20 15:19:21,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [882565232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:21,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:21,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:19:21,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419173584] [2022-03-20 15:19:21,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:21,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:19:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:19:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:19:21,282 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:19:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:21,364 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-03-20 15:19:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:19:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-03-20 15:19:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:21,365 INFO L225 Difference]: With dead ends: 88 [2022-03-20 15:19:21,365 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 15:19:21,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:21,366 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:21,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 118 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 15:19:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 15:19:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:19:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-03-20 15:19:21,393 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-03-20 15:19:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:21,393 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-03-20 15:19:21,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:19:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-03-20 15:19:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 15:19:21,396 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:21,396 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:21,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:21,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 15:19:21,600 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:21,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-03-20 15:19:21,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:21,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031837096] [2022-03-20 15:19:21,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-03-20 15:19:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:21,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441749910] [2022-03-20 15:19:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:21,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:21,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:21,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135413156] [2022-03-20 15:19:21,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:21,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:21,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:21,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:19:21,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:21,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:19:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 15:19:22,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:22,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441749910] [2022-03-20 15:19:22,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:22,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135413156] [2022-03-20 15:19:22,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135413156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:22,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:22,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 15:19:22,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:22,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031837096] [2022-03-20 15:19:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031837096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:22,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:22,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:19:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267880878] [2022-03-20 15:19:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:22,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:19:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:19:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:19:22,007 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:19:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:22,098 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-20 15:19:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:19:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-03-20 15:19:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:22,099 INFO L225 Difference]: With dead ends: 97 [2022-03-20 15:19:22,099 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 15:19:22,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:19:22,100 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:22,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 138 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 15:19:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-20 15:19:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 15:19:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-03-20 15:19:22,110 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-03-20 15:19:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:22,110 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-03-20 15:19:22,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:19:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-03-20 15:19:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 15:19:22,111 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:22,111 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:22,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 15:19:22,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 15:19:22,325 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-03-20 15:19:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973018821] [2022-03-20 15:19:22,326 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:22,326 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-03-20 15:19:22,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354379341] [2022-03-20 15:19:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:22,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:22,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:22,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468263856] [2022-03-20 15:19:22,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:22,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:22,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:22,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:22,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:19:22,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 15:19:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:22,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 15:19:22,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354379341] [2022-03-20 15:19:22,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468263856] [2022-03-20 15:19:22,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468263856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:22,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:22,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 15:19:22,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973018821] [2022-03-20 15:19:22,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973018821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:22,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:22,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:19:22,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468120540] [2022-03-20 15:19:22,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:22,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:19:22,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:19:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:19:22,815 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:19:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:22,914 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-03-20 15:19:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 15:19:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-03-20 15:19:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:22,916 INFO L225 Difference]: With dead ends: 106 [2022-03-20 15:19:22,916 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 15:19:22,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:19:22,916 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:22,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 152 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 15:19:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 15:19:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:19:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-20 15:19:22,928 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-03-20 15:19:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:22,928 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-20 15:19:22,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:19:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-20 15:19:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 15:19:22,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:22,929 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:22,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 15:19:23,158 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 15:19:23,159 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-03-20 15:19:23,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:23,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483975027] [2022-03-20 15:19:23,159 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-03-20 15:19:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:23,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811757208] [2022-03-20 15:19:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:23,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:23,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501138623] [2022-03-20 15:19:23,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:23,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:23,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:23,169 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:23,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:19:23,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 15:19:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:19:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:23,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 15:19:23,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811757208] [2022-03-20 15:19:23,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501138623] [2022-03-20 15:19:23,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501138623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:23,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 15:19:23,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483975027] [2022-03-20 15:19:23,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483975027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:23,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:19:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175284276] [2022-03-20 15:19:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:23,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:19:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:19:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:23,865 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:19:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:23,997 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-03-20 15:19:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 15:19:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-03-20 15:19:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:23,998 INFO L225 Difference]: With dead ends: 115 [2022-03-20 15:19:23,998 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 15:19:23,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 15:19:24,000 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:24,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 148 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 15:19:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 15:19:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 15:19:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-20 15:19:24,013 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-03-20 15:19:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:24,014 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-20 15:19:24,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:19:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-20 15:19:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 15:19:24,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:24,014 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:24,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 15:19:24,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 15:19:24,219 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-03-20 15:19:24,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:24,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438877661] [2022-03-20 15:19:24,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-03-20 15:19:24,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:24,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459556952] [2022-03-20 15:19:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:24,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:24,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397681639] [2022-03-20 15:19:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:24,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:24,234 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:24,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:19:24,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:24,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:24,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:19:24,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:24,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 15:19:24,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:24,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459556952] [2022-03-20 15:19:24,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:24,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397681639] [2022-03-20 15:19:24,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397681639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:24,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:24,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 15:19:24,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438877661] [2022-03-20 15:19:24,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438877661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:24,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:24,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:19:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917786125] [2022-03-20 15:19:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:24,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:19:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:19:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:24,789 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:19:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:24,921 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-20 15:19:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 15:19:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2022-03-20 15:19:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:24,923 INFO L225 Difference]: With dead ends: 124 [2022-03-20 15:19:24,923 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 15:19:24,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=656, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:19:24,925 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:24,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 150 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 15:19:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 15:19:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 15:19:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-03-20 15:19:24,940 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2022-03-20 15:19:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:24,940 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-03-20 15:19:24,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:19:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-03-20 15:19:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 15:19:24,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:24,942 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:24,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:25,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:25,160 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 21 times [2022-03-20 15:19:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400561560] [2022-03-20 15:19:25,161 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 22 times [2022-03-20 15:19:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:25,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127770921] [2022-03-20 15:19:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:25,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:25,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:25,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425908296] [2022-03-20 15:19:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:25,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:25,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:25,179 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:25,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:19:25,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:25,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 15:19:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:25,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 15:19:25,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:25,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127770921] [2022-03-20 15:19:25,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:25,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425908296] [2022-03-20 15:19:25,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425908296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:25,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:25,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-20 15:19:25,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:25,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400561560] [2022-03-20 15:19:25,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400561560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:25,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:25,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:19:25,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946598935] [2022-03-20 15:19:25,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:25,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:19:25,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:25,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:19:25,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:25,729 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:19:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:25,850 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-03-20 15:19:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 15:19:25,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2022-03-20 15:19:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:25,851 INFO L225 Difference]: With dead ends: 133 [2022-03-20 15:19:25,851 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 15:19:25,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=489, Invalid=701, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:19:25,852 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:25,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 15:19:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-20 15:19:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 15:19:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-03-20 15:19:25,867 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2022-03-20 15:19:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:25,867 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-03-20 15:19:25,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:19:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-03-20 15:19:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 15:19:25,868 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:25,868 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:25,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 15:19:26,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 15:19:26,075 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 23 times [2022-03-20 15:19:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [941838303] [2022-03-20 15:19:26,076 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 24 times [2022-03-20 15:19:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240592997] [2022-03-20 15:19:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:26,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:26,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600068580] [2022-03-20 15:19:26,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:26,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:26,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:26,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:19:27,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 15:19:27,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 15:19:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:27,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 15:19:28,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:28,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240592997] [2022-03-20 15:19:28,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:28,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600068580] [2022-03-20 15:19:28,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600068580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:28,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:28,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-20 15:19:28,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:28,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [941838303] [2022-03-20 15:19:28,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [941838303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:28,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:28,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:19:28,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302603417] [2022-03-20 15:19:28,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:28,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:19:28,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:19:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:28,264 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:19:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:28,443 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-03-20 15:19:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 15:19:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2022-03-20 15:19:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:28,444 INFO L225 Difference]: With dead ends: 142 [2022-03-20 15:19:28,444 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 15:19:28,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=512, Invalid=748, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:19:28,445 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 41 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:28,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 15:19:28,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 15:19:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 15:19:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-03-20 15:19:28,456 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2022-03-20 15:19:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:28,457 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-03-20 15:19:28,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:19:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-03-20 15:19:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 15:19:28,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:28,457 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:28,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 15:19:28,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 15:19:28,663 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 25 times [2022-03-20 15:19:28,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:28,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1859028592] [2022-03-20 15:19:28,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 26 times [2022-03-20 15:19:28,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:28,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467387306] [2022-03-20 15:19:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:28,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911098365] [2022-03-20 15:19:28,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:28,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:28,673 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:28,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 15:19:28,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:28,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:19:28,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:28,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 15:19:29,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467387306] [2022-03-20 15:19:29,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911098365] [2022-03-20 15:19:29,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911098365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:29,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:29,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-20 15:19:29,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1859028592] [2022-03-20 15:19:29,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1859028592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:29,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:29,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:19:29,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143453512] [2022-03-20 15:19:29,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:29,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:19:29,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:19:29,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:29,234 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:19:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:29,396 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-03-20 15:19:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 15:19:29,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2022-03-20 15:19:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:29,397 INFO L225 Difference]: With dead ends: 151 [2022-03-20 15:19:29,397 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 15:19:29,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=535, Invalid=797, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 15:19:29,398 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 52 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:29,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 174 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 15:19:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 15:19:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 15:19:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-20 15:19:29,410 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2022-03-20 15:19:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:29,410 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-20 15:19:29,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:19:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-20 15:19:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 15:19:29,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:29,411 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:29,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 15:19:29,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 15:19:29,623 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 27 times [2022-03-20 15:19:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:29,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543729164] [2022-03-20 15:19:29,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 28 times [2022-03-20 15:19:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:29,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549941436] [2022-03-20 15:19:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:29,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614120687] [2022-03-20 15:19:29,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:29,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:29,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:29,631 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:29,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 15:19:29,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:29,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:19:29,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:30,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 15:19:30,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:30,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549941436] [2022-03-20 15:19:30,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:30,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614120687] [2022-03-20 15:19:30,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614120687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:30,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:30,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 15:19:30,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:30,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543729164] [2022-03-20 15:19:30,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543729164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:30,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:30,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:19:30,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063632922] [2022-03-20 15:19:30,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:30,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:19:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:19:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:30,387 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:19:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:30,534 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-03-20 15:19:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 15:19:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2022-03-20 15:19:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:30,540 INFO L225 Difference]: With dead ends: 160 [2022-03-20 15:19:30,540 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 15:19:30,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=558, Invalid=848, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 15:19:30,541 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 81 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:30,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 188 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 15:19:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 15:19:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 15:19:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-03-20 15:19:30,567 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2022-03-20 15:19:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:30,568 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-03-20 15:19:30,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:19:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-03-20 15:19:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 15:19:30,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:30,576 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:30,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:30,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 15:19:30,780 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 29 times [2022-03-20 15:19:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:30,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118571628] [2022-03-20 15:19:30,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 30 times [2022-03-20 15:19:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:30,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009875341] [2022-03-20 15:19:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:30,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:30,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:30,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444096560] [2022-03-20 15:19:30,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:30,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:30,803 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:30,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 15:19:52,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 15:19:52,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:19:52,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:52,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 15:19:53,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009875341] [2022-03-20 15:19:53,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444096560] [2022-03-20 15:19:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444096560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:53,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:53,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-20 15:19:53,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118571628] [2022-03-20 15:19:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118571628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:53,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:53,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:19:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446842903] [2022-03-20 15:19:53,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:53,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:19:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:19:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:53,079 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:19:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:53,271 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-03-20 15:19:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 15:19:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2022-03-20 15:19:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:53,272 INFO L225 Difference]: With dead ends: 169 [2022-03-20 15:19:53,272 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 15:19:53,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=581, Invalid=901, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 15:19:53,273 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:53,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 202 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 15:19:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-20 15:19:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:19:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2022-03-20 15:19:53,286 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2022-03-20 15:19:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:53,286 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2022-03-20 15:19:53,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:19:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2022-03-20 15:19:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 15:19:53,287 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:53,287 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:53,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:53,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:53,496 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 31 times [2022-03-20 15:19:53,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1317580902] [2022-03-20 15:19:53,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 32 times [2022-03-20 15:19:53,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:53,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782298165] [2022-03-20 15:19:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:53,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:53,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:53,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785709150] [2022-03-20 15:19:53,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:53,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:53,515 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:53,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 15:19:53,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 15:19:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:53,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 15:19:54,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:54,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782298165] [2022-03-20 15:19:54,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:54,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785709150] [2022-03-20 15:19:54,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785709150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:54,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:54,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-20 15:19:54,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:54,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1317580902] [2022-03-20 15:19:54,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1317580902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:54,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:54,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:19:54,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914869849] [2022-03-20 15:19:54,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:54,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:19:54,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:19:54,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:54,223 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:19:54,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:54,412 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-03-20 15:19:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 15:19:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2022-03-20 15:19:54,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:54,415 INFO L225 Difference]: With dead ends: 178 [2022-03-20 15:19:54,415 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 15:19:54,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=604, Invalid=956, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:19:54,416 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 35 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:54,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 234 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 15:19:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 15:19:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 15:19:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-03-20 15:19:54,456 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2022-03-20 15:19:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:54,456 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-03-20 15:19:54,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:19:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-03-20 15:19:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 15:19:54,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:54,457 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:54,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:54,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:54,673 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 33 times [2022-03-20 15:19:54,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [876201144] [2022-03-20 15:19:54,674 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 34 times [2022-03-20 15:19:54,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6548047] [2022-03-20 15:19:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:54,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:54,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116578048] [2022-03-20 15:19:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:54,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:54,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:54,691 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:54,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:19:54,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:54,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:19:54,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:55,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-20 15:19:55,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6548047] [2022-03-20 15:19:55,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116578048] [2022-03-20 15:19:55,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116578048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:55,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:55,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-20 15:19:55,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [876201144] [2022-03-20 15:19:55,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [876201144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:55,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:55,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:19:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585362189] [2022-03-20 15:19:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:55,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:19:55,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:19:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:55,525 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:19:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:55,769 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-03-20 15:19:55,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 15:19:55,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2022-03-20 15:19:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:55,770 INFO L225 Difference]: With dead ends: 187 [2022-03-20 15:19:55,770 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 15:19:55,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=1013, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 15:19:55,771 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 84 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:55,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 206 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 15:19:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-20 15:19:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 15:19:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2022-03-20 15:19:55,786 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2022-03-20 15:19:55,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:55,787 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2022-03-20 15:19:55,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:19:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2022-03-20 15:19:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 15:19:55,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:55,787 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:55,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:55,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:55,992 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 35 times [2022-03-20 15:19:55,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:55,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1709172738] [2022-03-20 15:19:55,993 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 36 times [2022-03-20 15:19:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:55,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615978349] [2022-03-20 15:19:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:55,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:55,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428696140] [2022-03-20 15:19:55,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:55,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:55,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:56,000 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:56,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:19:58,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 15:19:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:19:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:58,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 15:19:58,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615978349] [2022-03-20 15:19:58,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428696140] [2022-03-20 15:19:58,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428696140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:58,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:58,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-20 15:19:58,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1709172738] [2022-03-20 15:19:58,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1709172738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:58,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:58,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:19:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622941357] [2022-03-20 15:19:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:58,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:19:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:19:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:58,831 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:19:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:59,010 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-03-20 15:19:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 15:19:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2022-03-20 15:19:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:59,013 INFO L225 Difference]: With dead ends: 196 [2022-03-20 15:19:59,013 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 15:19:59,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=650, Invalid=1072, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:19:59,014 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 65 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:59,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 214 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 15:19:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 15:19:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 15:19:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2022-03-20 15:19:59,035 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2022-03-20 15:19:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:59,036 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2022-03-20 15:19:59,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:19:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2022-03-20 15:19:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-20 15:19:59,037 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:59,037 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:59,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:59,244 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 37 times [2022-03-20 15:19:59,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:59,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897744885] [2022-03-20 15:19:59,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 38 times [2022-03-20 15:19:59,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:59,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145662487] [2022-03-20 15:19:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:59,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:59,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070215307] [2022-03-20 15:19:59,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:59,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:59,253 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:59,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:19:59,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:59,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:19:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:59,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-20 15:19:59,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:59,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145662487] [2022-03-20 15:19:59,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:59,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070215307] [2022-03-20 15:19:59,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070215307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:59,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:59,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-20 15:19:59,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:59,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897744885] [2022-03-20 15:19:59,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897744885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:59,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:59,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:19:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990929936] [2022-03-20 15:19:59,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:59,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:19:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:19:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:19:59,945 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:20:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:00,216 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-03-20 15:20:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 15:20:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2022-03-20 15:20:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:00,218 INFO L225 Difference]: With dead ends: 205 [2022-03-20 15:20:00,218 INFO L226 Difference]: Without dead ends: 200 [2022-03-20 15:20:00,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:20:00,218 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 59 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:00,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 228 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:20:00,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-20 15:20:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-20 15:20:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 15:20:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-03-20 15:20:00,237 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2022-03-20 15:20:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:00,237 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-03-20 15:20:00,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:20:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-03-20 15:20:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 15:20:00,238 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:00,238 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:00,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 15:20:00,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:00,443 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 39 times [2022-03-20 15:20:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:00,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542232893] [2022-03-20 15:20:00,443 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 40 times [2022-03-20 15:20:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:00,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281378018] [2022-03-20 15:20:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:00,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:00,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385260511] [2022-03-20 15:20:00,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:20:00,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:00,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:00,451 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:00,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:20:00,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:20:00,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 15:20:00,602 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 15:20:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 15:20:00,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 15:20:00,792 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 15:20:00,792 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 15:20:00,795 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 15:20:00,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:01,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:01,012 INFO L719 BasicCegarLoop]: Path program histogram: [40, 2, 2, 2, 2] [2022-03-20 15:20:01,013 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 15:20:01,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:20:01 BoogieIcfgContainer [2022-03-20 15:20:01,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 15:20:01,033 INFO L158 Benchmark]: Toolchain (without parser) took 47775.40ms. Allocated memory was 202.4MB in the beginning and 292.6MB in the end (delta: 90.2MB). Free memory was 150.6MB in the beginning and 118.5MB in the end (delta: 32.1MB). Peak memory consumption was 123.1MB. Max. memory is 8.0GB. [2022-03-20 15:20:01,033 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 202.4MB. Free memory is still 166.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 15:20:01,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.60ms. Allocated memory is still 202.4MB. Free memory was 150.5MB in the beginning and 176.4MB in the end (delta: -25.9MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. [2022-03-20 15:20:01,033 INFO L158 Benchmark]: Boogie Preprocessor took 32.24ms. Allocated memory is still 202.4MB. Free memory was 176.0MB in the beginning and 175.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 15:20:01,033 INFO L158 Benchmark]: RCFGBuilder took 229.29ms. Allocated memory is still 202.4MB. Free memory was 174.6MB in the beginning and 164.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 15:20:01,034 INFO L158 Benchmark]: TraceAbstraction took 47311.59ms. Allocated memory was 202.4MB in the beginning and 292.6MB in the end (delta: 90.2MB). Free memory was 164.1MB in the beginning and 118.5MB in the end (delta: 45.6MB). Peak memory consumption was 136.6MB. Max. memory is 8.0GB. [2022-03-20 15:20:01,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 202.4MB. Free memory is still 166.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.60ms. Allocated memory is still 202.4MB. Free memory was 150.5MB in the beginning and 176.4MB in the end (delta: -25.9MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.24ms. Allocated memory is still 202.4MB. Free memory was 176.0MB in the beginning and 175.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 229.29ms. Allocated memory is still 202.4MB. Free memory was 174.6MB in the beginning and 164.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 47311.59ms. Allocated memory was 202.4MB in the beginning and 292.6MB in the end (delta: 90.2MB). Free memory was 164.1MB in the beginning and 118.5MB in the end (delta: 45.6MB). Peak memory consumption was 136.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L28] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND FALSE !(counter++<20) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47.3s, OverallIterations: 24, TraceHistogramMax: 21, PathProgramHistogramMax: 40, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 751 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 750 mSDsluCounter, 3287 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2497 mSDsCounter, 336 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1225 IncrementalHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 336 mSolverCounterUnsat, 790 mSDtfsCounter, 1225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4591 GetRequests, 4028 SyntacticMatches, 11 SemanticMatches, 552 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=23, InterpolantAutomatonStates: 475, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 23 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 15:20:01,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...