/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:53:10,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:53:10,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:53:10,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:53:10,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 20:53:10,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 20:53:10,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 20:53:10,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 20:53:10,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 20:53:10,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 20:53:10,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 20:53:10,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 20:53:10,964 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 20:53:10,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 20:53:10,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 20:53:10,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 20:53:10,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 20:53:10,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 20:53:10,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:53:10,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:53:10,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:53:10,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:53:10,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:53:10,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:53:10,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:53:10,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:53:10,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:53:10,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:53:10,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:53:10,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:53:10,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:53:10,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:53:10,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:53:10,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:53:10,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:53:10,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:53:10,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:53:10,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:53:10,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:53:10,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:53:10,990 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:53:10,990 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:53:10,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:53:10,990 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:53:10,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:53:11,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:53:11,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:53:11,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:53:11,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:53:11,185 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:53:11,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-03-20 20:53:11,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f89d654/8bd493ade79a41129c59a665a125aa23/FLAGf07b408d9 [2022-03-20 20:53:11,551 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:53:11,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-03-20 20:53:11,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f89d654/8bd493ade79a41129c59a665a125aa23/FLAGf07b408d9 [2022-03-20 20:53:11,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f89d654/8bd493ade79a41129c59a665a125aa23 [2022-03-20 20:53:11,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:53:11,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:53:11,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:53:11,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:53:11,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:53:11,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518eb056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11, skipping insertion in model container [2022-03-20 20:53:11,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:53:11,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:53:11,696 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/egcd2-ll_valuebound5.c[490,503] [2022-03-20 20:53:11,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:53:11,715 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:53:11,721 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/egcd2-ll_valuebound5.c[490,503] [2022-03-20 20:53:11,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:53:11,734 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:53:11,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11 WrapperNode [2022-03-20 20:53:11,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:53:11,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:53:11,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:53:11,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:53:11,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:53:11,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:53:11,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:53:11,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:53:11,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (1/1) ... [2022-03-20 20:53:11,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:53:11,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:11,797 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 20:53:11,802 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 20:53:11,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:53:11,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:53:11,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:53:11,820 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:53:11,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:53:11,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:53:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:53:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:53:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:53:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:53:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:53:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:53:11,866 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:53:11,867 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:53:11,962 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:53:11,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:53:11,967 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 20:53:11,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:53:11 BoogieIcfgContainer [2022-03-20 20:53:11,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:53:11,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:53:11,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:53:11,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:53:11,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:53:11" (1/3) ... [2022-03-20 20:53:11,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7305bfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:53:11, skipping insertion in model container [2022-03-20 20:53:11,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:53:11" (2/3) ... [2022-03-20 20:53:11,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7305bfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:53:11, skipping insertion in model container [2022-03-20 20:53:11,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:53:11" (3/3) ... [2022-03-20 20:53:11,985 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2022-03-20 20:53:11,988 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:53:11,988 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:53:12,030 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:53:12,034 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 20:53:12,034 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:53:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 20:53:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 20:53:12,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:12,049 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:12,049 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-20 20:53:12,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:12,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369451131] [2022-03-20 20:53:12,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-20 20:53:12,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:12,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355710997] [2022-03-20 20:53:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:12,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:53:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:53:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:53:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:53:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 20:53:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 20:53:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 20:53:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:53:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 20:53:12,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:12,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355710997] [2022-03-20 20:53:12,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355710997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:12,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:12,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:53:12,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:12,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369451131] [2022-03-20 20:53:12,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369451131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:12,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:12,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:53:12,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995441411] [2022-03-20 20:53:12,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:12,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:53:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:53:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:53:12,323 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:53:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:12,383 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-20 20:53:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:53:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 20:53:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:12,389 INFO L225 Difference]: With dead ends: 73 [2022-03-20 20:53:12,390 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 20:53:12,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:53:12,394 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:12,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:53:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 20:53:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 20:53:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 20:53:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-20 20:53:12,421 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-20 20:53:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:12,422 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-20 20:53:12,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:53:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-20 20:53:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 20:53:12,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:12,423 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:12,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:53:12,424 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-20 20:53:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:12,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1172812139] [2022-03-20 20:53:12,425 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-20 20:53:12,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:12,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480919435] [2022-03-20 20:53:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:12,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:12,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643548939] [2022-03-20 20:53:12,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:12,452 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 20:53:12,466 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 20:53:12,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:12,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:12,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:53:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 20:53:12,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 20:53:12,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:12,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480919435] [2022-03-20 20:53:12,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:12,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643548939] [2022-03-20 20:53:12,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643548939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:53:12,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:53:12,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 20:53:12,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:12,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1172812139] [2022-03-20 20:53:12,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1172812139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:12,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:12,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:53:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846709276] [2022-03-20 20:53:12,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:12,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:53:12,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:53:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:53:12,774 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:53:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:12,864 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-20 20:53:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:53:12,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-20 20:53:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:12,868 INFO L225 Difference]: With dead ends: 52 [2022-03-20 20:53:12,868 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 20:53:12,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:53:12,870 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:12,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:53:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 20:53:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 20:53:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 20:53:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 20:53:12,884 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-20 20:53:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:12,884 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 20:53:12,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:53:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 20:53:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 20:53:12,887 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:12,887 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:12,906 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 20:53:13,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:13,104 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-20 20:53:13,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:13,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1146621584] [2022-03-20 20:53:13,106 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-20 20:53:13,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:13,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299260507] [2022-03-20 20:53:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:13,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:13,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:13,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252742836] [2022-03-20 20:53:13,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:13,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:13,140 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 20:53:13,156 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 20:53:13,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:53:13,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 20:53:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 20:53:13,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:53:13,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299260507] [2022-03-20 20:53:13,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252742836] [2022-03-20 20:53:13,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252742836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:13,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:13,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:13,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:13,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1146621584] [2022-03-20 20:53:13,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1146621584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:13,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:13,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:13,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008891418] [2022-03-20 20:53:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:13,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:53:13,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:53:13,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:53:13,291 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 20:53:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:13,333 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-20 20:53:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:53:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-20 20:53:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:13,336 INFO L225 Difference]: With dead ends: 50 [2022-03-20 20:53:13,336 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 20:53:13,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 20:53:13,345 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:13,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:53:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 20:53:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-20 20:53:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 20:53:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-20 20:53:13,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-20 20:53:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:13,354 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-20 20:53:13,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 20:53:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-20 20:53:13,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 20:53:13,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:13,357 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:13,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 20:53:13,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 20:53:13,574 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-20 20:53:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1411119159] [2022-03-20 20:53:13,575 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-20 20:53:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470176946] [2022-03-20 20:53:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:13,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:13,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:13,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849188145] [2022-03-20 20:53:13,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:13,587 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 20:53:13,602 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 20:53:13,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:53:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 20:53:13,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:53:13,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:13,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470176946] [2022-03-20 20:53:13,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:13,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849188145] [2022-03-20 20:53:13,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849188145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:13,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:13,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:13,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:13,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1411119159] [2022-03-20 20:53:13,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1411119159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:13,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:13,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:13,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101149204] [2022-03-20 20:53:13,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:13,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:53:13,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:53:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:53:13,795 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:53:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:13,828 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-20 20:53:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:53:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-03-20 20:53:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:13,833 INFO L225 Difference]: With dead ends: 58 [2022-03-20 20:53:13,833 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 20:53:13,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 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 20:53:13,835 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:13,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:53:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 20:53:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 20:53:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 20:53:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-20 20:53:13,855 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-20 20:53:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:13,855 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-20 20:53:13,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:53:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-20 20:53:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 20:53:13,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:13,856 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:13,872 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 20:53:14,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:14,064 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-20 20:53:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223189975] [2022-03-20 20:53:14,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-20 20:53:14,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:14,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051235079] [2022-03-20 20:53:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:14,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994889361] [2022-03-20 20:53:14,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:14,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:14,079 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 20:53:14,079 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 20:53:14,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:53:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 20:53:14,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:53:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051235079] [2022-03-20 20:53:14,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:14,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994889361] [2022-03-20 20:53:14,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994889361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:14,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:14,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:14,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:14,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223189975] [2022-03-20 20:53:14,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223189975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:14,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:14,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074190419] [2022-03-20 20:53:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:14,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:53:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:53:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:53:14,240 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:53:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:14,279 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-20 20:53:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:53:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-20 20:53:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:14,281 INFO L225 Difference]: With dead ends: 62 [2022-03-20 20:53:14,281 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 20:53:14,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 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 20:53:14,282 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:14,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:53:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 20:53:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 20:53:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 20:53:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-20 20:53:14,293 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-20 20:53:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:14,293 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-20 20:53:14,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:53:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-20 20:53:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 20:53:14,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:14,294 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:14,313 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 20:53:14,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:14,513 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-20 20:53:14,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:14,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [937291062] [2022-03-20 20:53:14,514 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:14,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-20 20:53:14,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:14,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144598259] [2022-03-20 20:53:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:14,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:14,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138472221] [2022-03-20 20:53:14,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:14,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:14,524 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 20:53:14,526 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 20:53:14,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:53:14,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 20:53:14,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:14,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:14,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144598259] [2022-03-20 20:53:14,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:14,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138472221] [2022-03-20 20:53:14,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138472221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:53:14,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:53:14,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 20:53:14,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:14,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [937291062] [2022-03-20 20:53:14,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [937291062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:14,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:14,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:53:14,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268095456] [2022-03-20 20:53:14,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:14,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:53:14,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:53:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:53:14,887 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 20:53:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:14,957 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-20 20:53:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:53:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-20 20:53:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:14,961 INFO L225 Difference]: With dead ends: 66 [2022-03-20 20:53:14,961 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 20:53:14,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:53:14,962 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:14,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 181 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:53:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 20:53:14,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 20:53:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 20:53:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-20 20:53:14,996 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-20 20:53:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:14,997 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-20 20:53:14,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 20:53:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-20 20:53:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 20:53:15,000 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:15,001 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:15,019 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 20:53:15,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:15,217 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-20 20:53:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333481592] [2022-03-20 20:53:15,218 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-20 20:53:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9779078] [2022-03-20 20:53:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:15,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:15,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711241078] [2022-03-20 20:53:15,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:15,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:15,234 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 20:53:15,235 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 20:53:15,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:53:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 20:53:15,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-20 20:53:15,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9779078] [2022-03-20 20:53:15,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711241078] [2022-03-20 20:53:15,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711241078] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:53:15,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:53:15,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 20:53:15,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333481592] [2022-03-20 20:53:15,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333481592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:15,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:15,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:15,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939303213] [2022-03-20 20:53:15,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:15,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:53:15,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:53:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:53:15,478 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 20:53:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:15,508 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-20 20:53:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:53:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-03-20 20:53:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:15,509 INFO L225 Difference]: With dead ends: 69 [2022-03-20 20:53:15,509 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 20:53:15,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:53:15,510 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:15,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:53:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 20:53:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-20 20:53:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 20:53:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-20 20:53:15,516 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-20 20:53:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:15,516 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-20 20:53:15,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 20:53:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-20 20:53:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:53:15,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:15,516 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:15,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 20:53:15,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:15,737 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-20 20:53:15,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:15,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139777106] [2022-03-20 20:53:15,738 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-20 20:53:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:15,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327932291] [2022-03-20 20:53:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:15,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:15,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:15,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895404826] [2022-03-20 20:53:15,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:15,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:15,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:15,778 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 20:53:15,779 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 20:53:15,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:15,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:53:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 20:53:15,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 20:53:16,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327932291] [2022-03-20 20:53:16,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895404826] [2022-03-20 20:53:16,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895404826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:53:16,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:53:16,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:53:16,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139777106] [2022-03-20 20:53:16,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139777106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:16,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:16,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:53:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359135547] [2022-03-20 20:53:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:16,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:53:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:53:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:53:16,018 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:53:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:16,124 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-20 20:53:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:53:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-20 20:53:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:16,125 INFO L225 Difference]: With dead ends: 106 [2022-03-20 20:53:16,126 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 20:53:16,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:53:16,126 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:16,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:53:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 20:53:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-20 20:53:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 20:53:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-20 20:53:16,137 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-20 20:53:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:16,137 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-20 20:53:16,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:53:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-20 20:53:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 20:53:16,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:16,138 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:16,154 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 20:53:16,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:16,345 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:16,345 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-20 20:53:16,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:16,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277937165] [2022-03-20 20:53:16,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-20 20:53:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:16,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906647390] [2022-03-20 20:53:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:16,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:16,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:16,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495248823] [2022-03-20 20:53:16,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:16,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:16,355 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 20:53:16,385 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 20:53:16,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 20:53:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 20:53:16,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 20:53:16,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906647390] [2022-03-20 20:53:16,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495248823] [2022-03-20 20:53:16,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495248823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:53:16,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:53:16,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-20 20:53:16,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277937165] [2022-03-20 20:53:16,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277937165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:16,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:16,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:53:16,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45127021] [2022-03-20 20:53:16,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:16,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:53:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:53:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:53:16,677 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:53:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:16,804 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-20 20:53:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:53:16,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-20 20:53:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:16,805 INFO L225 Difference]: With dead ends: 124 [2022-03-20 20:53:16,806 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 20:53:16,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:53:16,806 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:16,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:53:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 20:53:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-20 20:53:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:53:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-20 20:53:16,820 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-20 20:53:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:16,820 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-20 20:53:16,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:53:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-20 20:53:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 20:53:16,821 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:16,821 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-03-20 20:53:16,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 20:53:17,038 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,SelfDestructingSolverStorable8 [2022-03-20 20:53:17,038 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:17,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-20 20:53:17,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:17,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2122121296] [2022-03-20 20:53:17,039 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-20 20:53:17,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:17,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777486109] [2022-03-20 20:53:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:17,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:17,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397166816] [2022-03-20 20:53:17,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:53:17,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:17,048 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 20:53:17,076 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 20:53:17,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:53:17,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 20:53:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 20:53:17,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-20 20:53:18,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777486109] [2022-03-20 20:53:18,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397166816] [2022-03-20 20:53:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397166816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:53:18,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:53:18,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-03-20 20:53:18,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2122121296] [2022-03-20 20:53:18,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2122121296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:18,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:18,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:53:18,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146620434] [2022-03-20 20:53:18,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:18,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:53:18,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:53:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:53:18,264 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-20 20:53:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:18,716 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-20 20:53:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:53:18,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-03-20 20:53:18,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:18,717 INFO L225 Difference]: With dead ends: 134 [2022-03-20 20:53:18,717 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 20:53:18,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:53:18,718 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:18,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 287 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:53:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 20:53:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-20 20:53:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:53:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-20 20:53:18,731 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 80 [2022-03-20 20:53:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:18,732 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-20 20:53:18,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-20 20:53:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-20 20:53:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 20:53:18,732 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:18,732 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:18,749 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 20:53:18,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 20:53:18,936 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-20 20:53:18,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:18,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117680370] [2022-03-20 20:53:18,951 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-20 20:53:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:18,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854092954] [2022-03-20 20:53:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:18,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:18,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59452699] [2022-03-20 20:53:18,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:53:18,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:19,016 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 20:53:19,046 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 20:53:19,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:53:19,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 20:53:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-20 20:53:19,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:19,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854092954] [2022-03-20 20:53:19,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59452699] [2022-03-20 20:53:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59452699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:53:19,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:53:19,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 20:53:19,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117680370] [2022-03-20 20:53:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117680370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:19,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:19,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:53:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752895034] [2022-03-20 20:53:19,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:19,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:53:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:53:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:53:19,469 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 20:53:19,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:19,643 INFO L93 Difference]: Finished difference Result 142 states and 185 transitions. [2022-03-20 20:53:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:53:19,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-20 20:53:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:19,644 INFO L225 Difference]: With dead ends: 142 [2022-03-20 20:53:19,644 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 20:53:19,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:53:19,645 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:19,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 261 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:53:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 20:53:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-03-20 20:53:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 79 states have internal predecessors, (90), 47 states have call successors, (47), 14 states have call predecessors, (47), 13 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:53:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 181 transitions. [2022-03-20 20:53:19,658 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 181 transitions. Word has length 85 [2022-03-20 20:53:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:19,658 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 181 transitions. [2022-03-20 20:53:19,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 20:53:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 181 transitions. [2022-03-20 20:53:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 20:53:19,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:19,659 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:19,677 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 20:53:19,875 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,SelfDestructingSolverStorable10 [2022-03-20 20:53:19,875 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-20 20:53:19,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:19,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1937170430] [2022-03-20 20:53:19,876 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-20 20:53:19,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:19,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122650899] [2022-03-20 20:53:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:19,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:19,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:19,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340474828] [2022-03-20 20:53:19,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:19,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:19,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:19,887 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 20:53:19,888 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 20:53:19,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:19,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 20:53:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 20:53:20,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 20:53:20,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:20,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122650899] [2022-03-20 20:53:20,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:20,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340474828] [2022-03-20 20:53:20,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340474828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:53:20,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:53:20,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 20:53:20,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:20,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1937170430] [2022-03-20 20:53:20,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1937170430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:20,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:20,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:53:20,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452270572] [2022-03-20 20:53:20,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:20,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:53:20,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:53:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:53:20,610 INFO L87 Difference]: Start difference. First operand 138 states and 181 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:53:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:20,818 INFO L93 Difference]: Finished difference Result 165 states and 217 transitions. [2022-03-20 20:53:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:53:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-03-20 20:53:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:20,820 INFO L225 Difference]: With dead ends: 165 [2022-03-20 20:53:20,820 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 20:53:20,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:53:20,822 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:20,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:53:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 20:53:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2022-03-20 20:53:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 92 states have internal predecessors, (105), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:53:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 212 transitions. [2022-03-20 20:53:20,845 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 212 transitions. Word has length 91 [2022-03-20 20:53:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:20,845 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 212 transitions. [2022-03-20 20:53:20,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:53:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 212 transitions. [2022-03-20 20:53:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 20:53:20,847 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:20,847 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 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 20:53:20,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 20:53:21,063 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,SelfDestructingSolverStorable11 [2022-03-20 20:53:21,063 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-20 20:53:21,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1490613860] [2022-03-20 20:53:21,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-20 20:53:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473582577] [2022-03-20 20:53:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:21,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:21,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:21,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614518135] [2022-03-20 20:53:21,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:21,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:21,100 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 20:53:21,107 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 20:53:21,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:53:21,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-20 20:53:21,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:53:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473582577] [2022-03-20 20:53:21,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614518135] [2022-03-20 20:53:21,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614518135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:21,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:21,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:21,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1490613860] [2022-03-20 20:53:21,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1490613860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:21,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:21,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:53:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226246618] [2022-03-20 20:53:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:21,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:53:21,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:53:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:53:21,268 INFO L87 Difference]: Start difference. First operand 161 states and 212 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 20:53:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:21,317 INFO L93 Difference]: Finished difference Result 209 states and 286 transitions. [2022-03-20 20:53:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:53:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-03-20 20:53:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:21,318 INFO L225 Difference]: With dead ends: 209 [2022-03-20 20:53:21,318 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 20:53:21,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:53:21,319 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:21,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:53:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 20:53:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-03-20 20:53:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 84 states have (on average 1.119047619047619) internal successors, (94), 86 states have internal predecessors, (94), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:53:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2022-03-20 20:53:21,333 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 100 [2022-03-20 20:53:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:21,334 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2022-03-20 20:53:21,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 20:53:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2022-03-20 20:53:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 20:53:21,335 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:21,335 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:21,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 20:53:21,563 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,SelfDestructingSolverStorable12 [2022-03-20 20:53:21,563 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-20 20:53:21,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:21,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819409631] [2022-03-20 20:53:21,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-20 20:53:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870679707] [2022-03-20 20:53:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:21,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:21,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347709119] [2022-03-20 20:53:21,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:21,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:21,584 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 20:53:21,585 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 20:53:21,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:21,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 20:53:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 90 proven. 49 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 20:53:22,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:39,612 WARN L232 SmtUtils]: Spent 7.23s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:54:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 84 proven. 39 refuted. 1 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 20:54:02,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870679707] [2022-03-20 20:54:02,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347709119] [2022-03-20 20:54:02,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347709119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:02,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:02,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-20 20:54:02,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:02,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819409631] [2022-03-20 20:54:02,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819409631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:02,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:02,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:54:02,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906167181] [2022-03-20 20:54:02,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:02,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:54:02,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:54:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=471, Unknown=4, NotChecked=0, Total=600 [2022-03-20 20:54:02,970 INFO L87 Difference]: Start difference. First operand 155 states and 201 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:54:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:03,714 INFO L93 Difference]: Finished difference Result 162 states and 207 transitions. [2022-03-20 20:54:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:54:03,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-03-20 20:54:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:03,716 INFO L225 Difference]: With dead ends: 162 [2022-03-20 20:54:03,716 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 20:54:03,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=158, Invalid=650, Unknown=4, NotChecked=0, Total=812 [2022-03-20 20:54:03,717 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:03,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 278 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:54:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 20:54:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-03-20 20:54:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 89 states have internal predecessors, (97), 55 states have call successors, (55), 17 states have call predecessors, (55), 16 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:54:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2022-03-20 20:54:03,746 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 107 [2022-03-20 20:54:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:03,746 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2022-03-20 20:54:03,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:54:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2022-03-20 20:54:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 20:54:03,747 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:03,747 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:54:03,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 20:54:03,982 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,SelfDestructingSolverStorable13 [2022-03-20 20:54:03,982 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-20 20:54:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447197743] [2022-03-20 20:54:03,983 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-20 20:54:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172698059] [2022-03-20 20:54:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:03,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:03,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591742282] [2022-03-20 20:54:03,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:54:03,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:03,995 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 20:54:03,996 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 20:54:04,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:54:04,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 20:54:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:04,511 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:54:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 81 proven. 59 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 20:54:05,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:06,791 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:54:14,599 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:54:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 46 refuted. 4 times theorem prover too weak. 243 trivial. 0 not checked. [2022-03-20 20:54:40,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:40,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172698059] [2022-03-20 20:54:40,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:40,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591742282] [2022-03-20 20:54:40,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591742282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:40,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:40,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-20 20:54:40,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:40,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447197743] [2022-03-20 20:54:40,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447197743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:40,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:40,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 20:54:40,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589947632] [2022-03-20 20:54:40,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:40,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 20:54:40,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 20:54:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=708, Unknown=10, NotChecked=0, Total=870 [2022-03-20 20:54:40,247 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 20:54:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:42,073 INFO L93 Difference]: Finished difference Result 192 states and 250 transitions. [2022-03-20 20:54:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:54:42,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) Word has length 113 [2022-03-20 20:54:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:42,075 INFO L225 Difference]: With dead ends: 192 [2022-03-20 20:54:42,075 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 20:54:42,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=200, Invalid=980, Unknown=10, NotChecked=0, Total=1190 [2022-03-20 20:54:42,078 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:42,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 518 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 20:54:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 20:54:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-03-20 20:54:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 104 states have internal predecessors, (114), 67 states have call successors, (67), 19 states have call predecessors, (67), 18 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 20:54:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2022-03-20 20:54:42,102 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 113 [2022-03-20 20:54:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:42,103 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2022-03-20 20:54:42,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 20:54:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2022-03-20 20:54:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 20:54:42,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:42,104 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:54:42,122 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 20:54:42,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:42,317 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-20 20:54:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429210914] [2022-03-20 20:54:42,317 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-20 20:54:42,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:42,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897457834] [2022-03-20 20:54:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:42,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:42,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:42,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110831463] [2022-03-20 20:54:42,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:54:42,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:42,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:42,344 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 20:54:42,391 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 20:54:42,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:54:42,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:54:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 20:54:42,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 20:54:42,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897457834] [2022-03-20 20:54:42,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110831463] [2022-03-20 20:54:42,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110831463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:42,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:42,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-20 20:54:42,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429210914] [2022-03-20 20:54:42,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429210914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:42,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:42,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:54:42,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132870069] [2022-03-20 20:54:42,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:42,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:54:42,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:42,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:54:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:54:42,650 INFO L87 Difference]: Start difference. First operand 188 states and 245 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-20 20:54:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:42,757 INFO L93 Difference]: Finished difference Result 248 states and 345 transitions. [2022-03-20 20:54:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:54:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-03-20 20:54:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:42,758 INFO L225 Difference]: With dead ends: 248 [2022-03-20 20:54:42,759 INFO L226 Difference]: Without dead ends: 240 [2022-03-20 20:54:42,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:54:42,759 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:42,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 359 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:54:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-20 20:54:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2022-03-20 20:54:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 117 states have internal predecessors, (132), 87 states have call successors, (87), 19 states have call predecessors, (87), 18 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-20 20:54:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 303 transitions. [2022-03-20 20:54:42,783 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 303 transitions. Word has length 116 [2022-03-20 20:54:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:42,784 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 303 transitions. [2022-03-20 20:54:42,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-20 20:54:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 303 transitions. [2022-03-20 20:54:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 20:54:42,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:42,785 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:54:42,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 20:54:43,001 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,SelfDestructingSolverStorable15 [2022-03-20 20:54:43,001 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-20 20:54:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:43,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1428312755] [2022-03-20 20:54:43,002 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-20 20:54:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:43,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513397992] [2022-03-20 20:54:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:43,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:43,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:43,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119097630] [2022-03-20 20:54:43,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:54:43,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:43,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:43,020 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 20:54:43,024 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 20:54:43,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:54:43,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:54:43,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-20 20:54:43,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-20 20:54:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:43,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513397992] [2022-03-20 20:54:43,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:43,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119097630] [2022-03-20 20:54:43,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119097630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:43,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:43,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:54:43,362 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:43,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1428312755] [2022-03-20 20:54:43,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1428312755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:43,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:43,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:54:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152072137] [2022-03-20 20:54:43,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:43,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:54:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:54:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:54:43,363 INFO L87 Difference]: Start difference. First operand 221 states and 303 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 20:54:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:43,507 INFO L93 Difference]: Finished difference Result 235 states and 314 transitions. [2022-03-20 20:54:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:54:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-03-20 20:54:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:43,524 INFO L225 Difference]: With dead ends: 235 [2022-03-20 20:54:43,524 INFO L226 Difference]: Without dead ends: 232 [2022-03-20 20:54:43,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:54:43,525 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:43,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 182 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:54:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-20 20:54:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-03-20 20:54:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 125 states have internal predecessors, (141), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 20:54:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 309 transitions. [2022-03-20 20:54:43,551 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 309 transitions. Word has length 122 [2022-03-20 20:54:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:43,551 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 309 transitions. [2022-03-20 20:54:43,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 20:54:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 309 transitions. [2022-03-20 20:54:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 20:54:43,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:43,553 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:54:43,571 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 20:54:43,766 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,SelfDestructingSolverStorable16 [2022-03-20 20:54:43,766 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-20 20:54:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:43,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [855074338] [2022-03-20 20:54:43,767 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-20 20:54:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:43,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663029557] [2022-03-20 20:54:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:43,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:43,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:43,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404223384] [2022-03-20 20:54:43,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:54:43,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:43,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:43,779 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 20:54:43,780 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 20:54:43,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:54:43,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 20:54:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 20:54:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 20:54:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:45,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663029557] [2022-03-20 20:54:45,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:45,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404223384] [2022-03-20 20:54:45,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404223384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:45,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:45,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-03-20 20:54:45,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:45,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [855074338] [2022-03-20 20:54:45,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [855074338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:45,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:45,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:54:45,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234085583] [2022-03-20 20:54:45,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:45,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:54:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:54:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:54:45,133 INFO L87 Difference]: Start difference. First operand 231 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 20:54:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:45,510 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2022-03-20 20:54:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:54:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2022-03-20 20:54:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:45,512 INFO L225 Difference]: With dead ends: 269 [2022-03-20 20:54:45,512 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 20:54:45,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:54:45,512 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:45,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 514 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:54:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 20:54:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-03-20 20:54:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-20 20:54:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-20 20:54:45,542 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 127 [2022-03-20 20:54:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:45,543 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-20 20:54:45,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 20:54:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-20 20:54:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 20:54:45,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:45,543 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2022-03-20 20:54:45,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 20:54:45,760 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,SelfDestructingSolverStorable17 [2022-03-20 20:54:45,760 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-20 20:54:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192966862] [2022-03-20 20:54:45,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-20 20:54:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:45,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774262958] [2022-03-20 20:54:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:45,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:45,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:45,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689591312] [2022-03-20 20:54:45,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:54:45,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:45,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:45,768 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 20:54:45,809 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 20:54:45,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:54:45,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 20:54:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 145 proven. 85 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 20:54:46,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:47,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774262958] [2022-03-20 20:54:47,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689591312] [2022-03-20 20:54:47,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689591312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:54:47,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:54:47,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 20:54:47,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192966862] [2022-03-20 20:54:47,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192966862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:47,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:47,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 20:54:47,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771455793] [2022-03-20 20:54:47,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:47,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 20:54:47,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 20:54:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:54:47,610 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 20:54:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:48,838 INFO L93 Difference]: Finished difference Result 272 states and 360 transitions. [2022-03-20 20:54:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 20:54:48,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-20 20:54:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:48,864 INFO L225 Difference]: With dead ends: 272 [2022-03-20 20:54:48,864 INFO L226 Difference]: Without dead ends: 270 [2022-03-20 20:54:48,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:54:48,865 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 38 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:48,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 581 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 20:54:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-20 20:54:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2022-03-20 20:54:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 85 states have call successors, (85), 23 states have call predecessors, (85), 22 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 20:54:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 312 transitions. [2022-03-20 20:54:48,894 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 312 transitions. Word has length 129 [2022-03-20 20:54:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:48,894 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 312 transitions. [2022-03-20 20:54:48,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 20:54:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 312 transitions. [2022-03-20 20:54:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 20:54:48,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:48,895 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:54:48,912 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 20:54:49,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:49,111 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-20 20:54:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:49,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [208407097] [2022-03-20 20:54:49,112 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-20 20:54:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:49,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485568308] [2022-03-20 20:54:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:49,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:49,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:49,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972684834] [2022-03-20 20:54:49,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:54:49,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:49,119 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 20:54:49,124 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 20:54:49,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:54:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 20:54:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 121 proven. 114 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 20:54:50,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:55:36,238 WARN L232 SmtUtils]: Spent 27.38s on a formula simplification that was a NOOP. DAG size: 14 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 20:56:03,041 WARN L232 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:56:39,386 WARN L232 SmtUtils]: Spent 7.15s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:57:03,575 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse13 (* c_main_~s~0 c_main_~k~0)) (.cse14 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse18 (+ c_main_~p~0 .cse14)) (.cse0 (* c_main_~q~0 c_main_~x~0)) (.cse17 (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse19 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse20 (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse1 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse15 (* c_main_~p~0 c_main_~x~0)) (.cse16 (* c_main_~r~0 c_main_~y~0)) (.cse21 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse2 (* (- 1) c_main_~r~0 c_main_~y~0)) (.cse3 (* c_main_~s~0 c_main_~y~0)) (.cse4 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse5 (* (- 1) c_main_~p~0 c_main_~x~0)) (.cse22 (+ c_main_~r~0 (* (- 1) .cse13)))) (let ((.cse6 (* .cse22 c_main_~y~0)) (.cse8 (+ .cse0 .cse17 .cse19 .cse20 .cse1 .cse15 c_main_~c~0 .cse16 .cse21 .cse2 .cse3 .cse4 .cse5)) (.cse7 (* .cse18 c_main_~x~0))) (or (not (= (+ .cse0 .cse1 c_main_~c~0 .cse2 .cse3 .cse4 .cse5) c_main_~b~0)) (not (= (+ .cse6 .cse7) .cse8)) (let ((.cse10 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse14))) (.cse12 (+ c_main_~s~0 .cse13 (* (- 1) c_main_~r~0)))) (let ((.cse9 (* .cse12 c_main_~y~0)) (.cse11 (* .cse10 c_main_~x~0))) (= (+ .cse9 (* .cse10 c_main_~xy~0) .cse11 (* c_main_~yy~0 .cse12)) (+ (* (+ .cse9 .cse11) c_main_~y~0) .cse9 .cse11)))) (not (= (+ .cse0 .cse3 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (<= (+ .cse15 c_main_~c~0 .cse16) (+ .cse0 .cse1 .cse3 .cse4)) (not (= (+ .cse0 .cse17 (* c_main_~xy~0 .cse18) .cse19 .cse20 .cse1 .cse15 c_main_~c~0 .cse16 .cse21 .cse2 .cse3 (* c_main_~yy~0 .cse22) .cse4 .cse5) (+ .cse6 (* .cse8 c_main_~y~0) .cse7))))))) is different from true [2022-03-20 20:58:03,877 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~q~0 c_main_~xy~0)) (.cse3 (* c_main_~yy~0 c_main_~s~0)) (.cse6 (* c_main_~yy~0 c_main_~r~0)) (.cse7 (* c_main_~xy~0 c_main_~p~0)) (.cse4 (* c_main_~q~0 c_main_~xy~0 c_main_~k~0)) (.cse5 (* c_main_~yy~0 c_main_~s~0 c_main_~k~0)) (.cse10 (* c_main_~p~0 c_main_~x~0)) (.cse11 (* c_main_~r~0 c_main_~y~0)) (.cse0 (* c_main_~q~0 c_main_~x~0)) (.cse8 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse1 (* c_main_~s~0 c_main_~y~0)) (.cse9 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (not (= (+ .cse0 .cse1 (* c_main_~b~0 c_main_~y~0)) (+ .cse2 .cse3 c_main_~b~0))) (= (+ .cse2 .cse4 .cse5 .cse3 (* c_main_~p~0 c_main_~x~0 c_main_~y~0) (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) .cse6 (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0) .cse7 (* c_main_~s~0 c_main_~y~0 c_main_~y~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse0 .cse1))) (not (= (+ .cse6 .cse8 c_main_~c~0 .cse9 .cse7) (+ .cse4 .cse5 .cse10 .cse11 (* c_main_~c~0 c_main_~y~0)))) (not (= (+ .cse10 .cse11) (+ .cse8 c_main_~c~0 .cse9))) (<= (+ .cse10 c_main_~c~0 .cse11) (+ .cse0 .cse8 .cse1 .cse9)))) is different from true [2022-03-20 20:58:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 141 proven. 59 refuted. 2 times theorem prover too weak. 342 trivial. 6 not checked. [2022-03-20 20:58:20,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485568308] [2022-03-20 20:58:20,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972684834] [2022-03-20 20:58:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972684834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:20,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-20 20:58:20,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [208407097] [2022-03-20 20:58:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [208407097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:20,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:58:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276790427] [2022-03-20 20:58:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:20,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:58:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:58:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=625, Unknown=34, NotChecked=110, Total=930 [2022-03-20 20:58:20,774 INFO L87 Difference]: Start difference. First operand 235 states and 312 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 20:58:24,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:58:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:31,553 INFO L93 Difference]: Finished difference Result 244 states and 320 transitions. [2022-03-20 20:58:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 20:58:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2022-03-20 20:58:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:31,555 INFO L225 Difference]: With dead ends: 244 [2022-03-20 20:58:31,555 INFO L226 Difference]: Without dead ends: 242 [2022-03-20 20:58:31,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 230 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 101.7s TimeCoverageRelationStatistics Valid=259, Invalid=1043, Unknown=38, NotChecked=142, Total=1482 [2022-03-20 20:58:31,556 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:31,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 523 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 20:58:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-20 20:58:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2022-03-20 20:58:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 20:58:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2022-03-20 20:58:31,585 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 132 [2022-03-20 20:58:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:31,585 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2022-03-20 20:58:31,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 20:58:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2022-03-20 20:58:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 20:58:31,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:31,586 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:31,603 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 20:58:31,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:31,799 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-20 20:58:31,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:31,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60817451] [2022-03-20 20:58:31,800 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-20 20:58:31,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:31,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44209314] [2022-03-20 20:58:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:31,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:31,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:31,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67470320] [2022-03-20 20:58:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:31,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:31,807 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 20:58:31,812 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 20:58:31,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:31,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 20:58:31,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 67 proven. 48 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 20:58:32,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:32,679 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:32,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44209314] [2022-03-20 20:58:32,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67470320] [2022-03-20 20:58:32,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67470320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:32,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:32,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 20:58:32,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:32,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60817451] [2022-03-20 20:58:32,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60817451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:32,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:32,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:58:32,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097313756] [2022-03-20 20:58:32,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:32,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:58:32,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:58:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:58:32,765 INFO L87 Difference]: Start difference. First operand 239 states and 315 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 20:58:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:33,531 INFO L93 Difference]: Finished difference Result 280 states and 374 transitions. [2022-03-20 20:58:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:58:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-03-20 20:58:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:33,533 INFO L225 Difference]: With dead ends: 280 [2022-03-20 20:58:33,533 INFO L226 Difference]: Without dead ends: 277 [2022-03-20 20:58:33,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:58:33,534 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 29 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:33,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 471 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 20:58:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-20 20:58:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2022-03-20 20:58:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 148 states have internal predecessors, (167), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 20:58:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 367 transitions. [2022-03-20 20:58:33,585 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 367 transitions. Word has length 135 [2022-03-20 20:58:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:33,586 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 367 transitions. [2022-03-20 20:58:33,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 20:58:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 367 transitions. [2022-03-20 20:58:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 20:58:33,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:33,587 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2022-03-20 20:58:33,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 20:58:33,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 20:58:33,804 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-20 20:58:33,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:33,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1516051637] [2022-03-20 20:58:33,804 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-20 20:58:33,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:33,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14504031] [2022-03-20 20:58:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:33,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:33,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:33,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661200728] [2022-03-20 20:58:33,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:33,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:33,812 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 20:58:33,813 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 20:58:33,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 20:58:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:35,000 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:35,002 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:35,003 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:35,029 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 142 proven. 92 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2022-03-20 20:58:35,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:36,451 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2022-03-20 20:58:36,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:36,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14504031] [2022-03-20 20:58:36,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:36,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661200728] [2022-03-20 20:58:36,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661200728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:36,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:36,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2022-03-20 20:58:36,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:36,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1516051637] [2022-03-20 20:58:36,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1516051637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:36,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:36,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 20:58:36,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853505660] [2022-03-20 20:58:36,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:36,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 20:58:36,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 20:58:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:58:36,656 INFO L87 Difference]: Start difference. First operand 274 states and 367 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2022-03-20 20:58:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:38,427 INFO L93 Difference]: Finished difference Result 291 states and 389 transitions. [2022-03-20 20:58:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 20:58:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 138 [2022-03-20 20:58:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:38,429 INFO L225 Difference]: With dead ends: 291 [2022-03-20 20:58:38,429 INFO L226 Difference]: Without dead ends: 284 [2022-03-20 20:58:38,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 20:58:38,430 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 51 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:38,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 401 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 754 Invalid, 0 Unknown, 101 Unchecked, 1.5s Time] [2022-03-20 20:58:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-20 20:58:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2022-03-20 20:58:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 149 states have (on average 1.1409395973154361) internal successors, (170), 150 states have internal predecessors, (170), 105 states have call successors, (105), 26 states have call predecessors, (105), 25 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 20:58:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 378 transitions. [2022-03-20 20:58:38,466 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 378 transitions. Word has length 138 [2022-03-20 20:58:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:38,466 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 378 transitions. [2022-03-20 20:58:38,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2022-03-20 20:58:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 378 transitions. [2022-03-20 20:58:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 20:58:38,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:38,467 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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 20:58:38,486 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 20:58:38,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 20:58:38,684 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1351165176, now seen corresponding path program 11 times [2022-03-20 20:58:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051664903] [2022-03-20 20:58:38,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:38,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1351165176, now seen corresponding path program 12 times [2022-03-20 20:58:38,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:38,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231535623] [2022-03-20 20:58:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:38,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:38,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607048619] [2022-03-20 20:58:38,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:58:38,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:38,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:38,696 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 20:58:38,696 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 20:58:39,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:58:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 20:58:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 89 proven. 72 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-03-20 20:58:40,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:40,425 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:42,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231535623] [2022-03-20 20:58:42,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607048619] [2022-03-20 20:58:42,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607048619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:42,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:42,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 20:58:42,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051664903] [2022-03-20 20:58:42,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051664903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:42,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:42,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 20:58:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128318080] [2022-03-20 20:58:42,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:42,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 20:58:42,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 20:58:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:58:42,286 INFO L87 Difference]: Start difference. First operand 280 states and 378 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-20 20:58:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:43,734 INFO L93 Difference]: Finished difference Result 314 states and 424 transitions. [2022-03-20 20:58:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 20:58:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2022-03-20 20:58:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:43,752 INFO L225 Difference]: With dead ends: 314 [2022-03-20 20:58:43,752 INFO L226 Difference]: Without dead ends: 312 [2022-03-20 20:58:43,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 20:58:43,752 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 52 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:43,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 571 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 20:58:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-20 20:58:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2022-03-20 20:58:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 165 states have internal predecessors, (187), 117 states have call successors, (117), 28 states have call predecessors, (117), 27 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 20:58:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 419 transitions. [2022-03-20 20:58:43,796 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 419 transitions. Word has length 149 [2022-03-20 20:58:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:43,796 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 419 transitions. [2022-03-20 20:58:43,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-20 20:58:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 419 transitions. [2022-03-20 20:58:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 20:58:43,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:43,797 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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 20:58:43,804 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 20:58:44,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:44,002 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 13 times [2022-03-20 20:58:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [195616921] [2022-03-20 20:58:44,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 14 times [2022-03-20 20:58:44,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:44,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743016023] [2022-03-20 20:58:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:44,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:44,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384443581] [2022-03-20 20:58:44,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:44,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:44,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:44,027 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 20:58:44,028 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 20:58:44,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:44,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 20:58:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:44,587 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:44,589 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 50 proven. 120 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2022-03-20 20:58:45,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:46,762 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 53 proven. 93 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2022-03-20 20:58:49,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:49,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743016023] [2022-03-20 20:58:49,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:49,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384443581] [2022-03-20 20:58:49,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384443581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:49,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:49,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 31 [2022-03-20 20:58:49,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:49,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [195616921] [2022-03-20 20:58:49,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [195616921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:49,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:49,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 20:58:49,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143767720] [2022-03-20 20:58:49,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:49,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 20:58:49,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 20:58:49,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=766, Unknown=1, NotChecked=0, Total=930 [2022-03-20 20:58:49,442 INFO L87 Difference]: Start difference. First operand 309 states and 419 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-03-20 20:58:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:50,974 INFO L93 Difference]: Finished difference Result 380 states and 512 transitions. [2022-03-20 20:58:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 20:58:50,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) Word has length 149 [2022-03-20 20:58:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:50,977 INFO L225 Difference]: With dead ends: 380 [2022-03-20 20:58:50,977 INFO L226 Difference]: Without dead ends: 378 [2022-03-20 20:58:50,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=266, Invalid=1215, Unknown=1, NotChecked=0, Total=1482 [2022-03-20 20:58:50,978 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 57 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:50,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 414 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 20:58:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-20 20:58:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2022-03-20 20:58:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 200 states have (on average 1.135) internal successors, (227), 201 states have internal predecessors, (227), 141 states have call successors, (141), 34 states have call predecessors, (141), 33 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-20 20:58:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 507 transitions. [2022-03-20 20:58:51,039 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 507 transitions. Word has length 149 [2022-03-20 20:58:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:51,040 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 507 transitions. [2022-03-20 20:58:51,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-03-20 20:58:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 507 transitions. [2022-03-20 20:58:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 20:58:51,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:51,042 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:51,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:51,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,257 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 15 times [2022-03-20 20:58:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725825685] [2022-03-20 20:58:51,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 16 times [2022-03-20 20:58:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:51,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812339125] [2022-03-20 20:58:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:51,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:51,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217940394] [2022-03-20 20:58:51,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:51,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:51,265 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 20:58:51,266 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 20:58:51,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:51,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:51,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 20:58:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 244 proven. 53 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2022-03-20 20:58:51,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 58 proven. 53 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-03-20 20:58:52,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:52,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812339125] [2022-03-20 20:58:52,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:52,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217940394] [2022-03-20 20:58:52,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217940394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:52,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:52,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 20:58:52,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:52,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725825685] [2022-03-20 20:58:52,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725825685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:52,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:52,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:58:52,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818717350] [2022-03-20 20:58:52,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:52,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:58:52,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:58:52,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:58:52,239 INFO L87 Difference]: Start difference. First operand 375 states and 507 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 20:58:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:52,586 INFO L93 Difference]: Finished difference Result 418 states and 561 transitions. [2022-03-20 20:58:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 20:58:52,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 151 [2022-03-20 20:58:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:52,588 INFO L225 Difference]: With dead ends: 418 [2022-03-20 20:58:52,588 INFO L226 Difference]: Without dead ends: 346 [2022-03-20 20:58:52,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-03-20 20:58:52,589 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 38 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:52,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 516 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:58:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-03-20 20:58:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-03-20 20:58:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 185 states have (on average 1.1297297297297297) internal successors, (209), 186 states have internal predecessors, (209), 129 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-20 20:58:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 465 transitions. [2022-03-20 20:58:52,644 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 465 transitions. Word has length 151 [2022-03-20 20:58:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:52,645 INFO L478 AbstractCegarLoop]: Abstraction has 346 states and 465 transitions. [2022-03-20 20:58:52,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 20:58:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 465 transitions. [2022-03-20 20:58:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 20:58:52,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:52,646 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 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 20:58:52,662 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 20:58:52,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 20:58:52,863 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:52,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 17 times [2022-03-20 20:58:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [819462190] [2022-03-20 20:58:52,869 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 18 times [2022-03-20 20:58:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147922899] [2022-03-20 20:58:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:52,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:52,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95719506] [2022-03-20 20:58:52,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:58:52,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:52,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:52,888 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:52,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 20:58:53,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:58:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:53,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 20:58:53,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 107 proven. 150 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2022-03-20 20:58:55,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:56,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:56,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147922899] [2022-03-20 20:58:56,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:56,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95719506] [2022-03-20 20:58:56,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95719506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:56,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:56,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 20:58:56,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [819462190] [2022-03-20 20:58:56,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [819462190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:56,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:56,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 20:58:56,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244212272] [2022-03-20 20:58:56,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:56,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 20:58:56,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 20:58:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:58:56,806 INFO L87 Difference]: Start difference. First operand 346 states and 465 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-20 20:58:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:58,126 INFO L93 Difference]: Finished difference Result 380 states and 513 transitions. [2022-03-20 20:58:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:58:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 154 [2022-03-20 20:58:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:58,137 INFO L225 Difference]: With dead ends: 380 [2022-03-20 20:58:58,137 INFO L226 Difference]: Without dead ends: 378 [2022-03-20 20:58:58,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:58:58,138 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:58,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 466 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 620 Invalid, 0 Unknown, 80 Unchecked, 0.9s Time] [2022-03-20 20:58:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-20 20:58:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2022-03-20 20:58:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 197 states have (on average 1.1370558375634519) internal successors, (224), 198 states have internal predecessors, (224), 141 states have call successors, (141), 33 states have call predecessors, (141), 32 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-20 20:58:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 504 transitions. [2022-03-20 20:58:58,200 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 504 transitions. Word has length 154 [2022-03-20 20:58:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:58,200 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 504 transitions. [2022-03-20 20:58:58,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-20 20:58:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 504 transitions. [2022-03-20 20:58:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 20:58:58,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:58,201 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 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 20:58:58,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:58,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 20:58:58,407 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 19 times [2022-03-20 20:58:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1585850031] [2022-03-20 20:58:58,408 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:58,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 20 times [2022-03-20 20:58:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196778893] [2022-03-20 20:58:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:58,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244096106] [2022-03-20 20:58:58,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:58,415 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:58,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 20:58:58,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:58,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:58,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 20:58:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:59,820 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:59,822 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:59,822 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 199 proven. 154 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-20 20:59:10,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196778893] [2022-03-20 20:59:11,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244096106] [2022-03-20 20:59:11,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244096106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:11,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:11,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 20:59:11,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1585850031] [2022-03-20 20:59:11,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1585850031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:11,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:11,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:59:11,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164122311] [2022-03-20 20:59:11,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:11,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:59:11,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:59:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=361, Unknown=1, NotChecked=0, Total=462 [2022-03-20 20:59:11,834 INFO L87 Difference]: Start difference. First operand 371 states and 504 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-20 20:59:15,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:59:17,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:59:19,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:59:21,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:59:23,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:59:57,602 WARN L232 SmtUtils]: Spent 34.15s on a formula simplification. DAG size of input: 65 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:00:29,904 WARN L232 SmtUtils]: Spent 32.22s on a formula simplification. DAG size of input: 69 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:00:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:30,420 INFO L93 Difference]: Finished difference Result 388 states and 518 transitions. [2022-03-20 21:00:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:00:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 154 [2022-03-20 21:00:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:30,422 INFO L225 Difference]: With dead ends: 388 [2022-03-20 21:00:30,422 INFO L226 Difference]: Without dead ends: 386 [2022-03-20 21:00:30,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 78.3s TimeCoverageRelationStatistics Valid=160, Invalid=651, Unknown=1, NotChecked=0, Total=812 [2022-03-20 21:00:30,423 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 57 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:30,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 634 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 744 Invalid, 5 Unknown, 0 Unchecked, 11.9s Time] [2022-03-20 21:00:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-03-20 21:00:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 383. [2022-03-20 21:00:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 206 states have (on average 1.1310679611650485) internal successors, (233), 207 states have internal predecessors, (233), 141 states have call successors, (141), 36 states have call predecessors, (141), 35 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-20 21:00:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 513 transitions. [2022-03-20 21:00:30,487 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 513 transitions. Word has length 154 [2022-03-20 21:00:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:30,487 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 513 transitions. [2022-03-20 21:00:30,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-20 21:00:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 513 transitions. [2022-03-20 21:00:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 21:00:30,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:30,489 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:30,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:30,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 21:00:30,708 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-03-20 21:00:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [55007496] [2022-03-20 21:00:30,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-03-20 21:00:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065339981] [2022-03-20 21:00:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:30,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:30,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:30,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15247313] [2022-03-20 21:00:30,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:00:30,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:30,745 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:30,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 21:00:30,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:00:30,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 21:00:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 112 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-03-20 21:00:31,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:32,426 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 107 proven. 85 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-03-20 21:00:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065339981] [2022-03-20 21:00:38,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15247313] [2022-03-20 21:00:38,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15247313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:38,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:38,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-20 21:00:38,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [55007496] [2022-03-20 21:00:38,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [55007496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:38,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:38,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:00:38,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501658938] [2022-03-20 21:00:38,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:38,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:00:38,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:38,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:00:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=543, Unknown=2, NotChecked=0, Total=650 [2022-03-20 21:00:38,083 INFO L87 Difference]: Start difference. First operand 383 states and 513 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:00:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:39,080 INFO L93 Difference]: Finished difference Result 400 states and 527 transitions. [2022-03-20 21:00:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:00:39,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 157 [2022-03-20 21:00:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:39,083 INFO L225 Difference]: With dead ends: 400 [2022-03-20 21:00:39,083 INFO L226 Difference]: Without dead ends: 397 [2022-03-20 21:00:39,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=165, Invalid=825, Unknown=2, NotChecked=0, Total=992 [2022-03-20 21:00:39,083 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:39,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 258 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 21:00:39,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-03-20 21:00:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2022-03-20 21:00:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 215 states have (on average 1.1209302325581396) internal successors, (241), 216 states have internal predecessors, (241), 141 states have call successors, (141), 39 states have call predecessors, (141), 38 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-20 21:00:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 521 transitions. [2022-03-20 21:00:39,151 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 521 transitions. Word has length 157 [2022-03-20 21:00:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:39,151 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 521 transitions. [2022-03-20 21:00:39,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:00:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 521 transitions. [2022-03-20 21:00:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 21:00:39,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:39,156 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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, 1, 1] [2022-03-20 21:00:39,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:39,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 21:00:39,372 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-03-20 21:00:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:39,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364609392] [2022-03-20 21:00:39,373 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:39,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-03-20 21:00:39,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:39,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106513608] [2022-03-20 21:00:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:39,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:39,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:39,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309101824] [2022-03-20 21:00:39,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:00:39,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:39,392 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:39,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 21:00:39,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:00:39,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:39,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 21:00:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 193 proven. 82 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-03-20 21:00:40,760 INFO L328 TraceCheckSpWp]: Computing backward predicates...